# internship report # Introduction Through the internship, I have a preliminary understanding of environmental engineering and am full of hope for my employment prospects. Because human survival depends on the environment, and the important task of protecting the environment will soon fall on our shoulders, we must study professional knowledge seriously and master the professional knowledge we have learned, and hone ourselves in practice. I have compiled "3 Summary of Environmental Professional Internship Reports" for everyone. I hope it will be helpful to everyone!
Part 1
According to the school's arrangement, our environmental major will go to the following four places to conduct a series of internships in the two days from x, month x to x, 20xx:
On the morning of x, month x, 20xx, we went to xx Group xxx Carbon Black Co., Ltd. to get to know the internship. xxx Carbon Black Co., Ltd., formerly known as xxx (Group) Co., Ltd., was founded in 1964 and has a history of producing carbon black for more than 40 years. It is the first carbon black industry enterprise in mainland China to obtain a public offering of stocks and is a company planned by the Ministry of Chemical Industry. It is one of the four largest carbon black production bases in the country. It is a large-scale carbon black factory in the five southern provinces and one of the 500 chemical companies in China. It is a national second-level enterprise with import and export rights. At present, it has an annual production capacity of 60,000 tons of carbon black. Among them, xx brand carbon black n220, n330 and n660 are provincial and ministerial quality products. They enjoy the honor of export inspection exemption and have been recognized by many merchants and relevant certification departments. xx brand Carbon black has been awarded the honorary title of Guangdong Provincial Trademark.
This is a company engaged in the production of carbon black using industrial waste. During the production process, a large amount of pollution emissions (waste gas, waste water and solid waste) are produced. During the production process, this company Different methods and equipment are used to treat and treat the large amounts of pollutant emissions generated by production. According to the description of an internal official, for wastewater, the sewage from the production process is collected into the sewage treatment tank and its content exceeding the standard is prohibited from being discharged and treated again. At the same time, this company also purchased advanced foreign equipment (such as toc-4100) for full-process automated monitoring in order to meet national emission standards. The exhaust gas mainly produces a large amount of sulfur dioxide. This company has established a desulfurization and dust removal system to process it. , for solid waste, it is classified and recycled, and it can also be recycled to achieve the effect of making the best use of materials. The waste heat generated during the production process can also be used to respond to the national slogan of energy conservation and emission reduction.
On the afternoon of x, month x, 20xx, we went to the Hedong Water Plant of the xx City Water Supply Company to study. The purpose of tap water purification treatment is to remove suspended substances, colloidal substances, cocci, algae, heavy metals, organic pollutants and other harmful components in the raw water, so that the purified water quality can meet the needs of domestic or industrial water. Commonly used water purification processes include: natural sedimentation, oxidation (pre-oxidation) aeration, coagulation sedimentation or clarification, air flotation, filtration, adsorption, etc. There are also various special treatments for removing algae, iron, manganese, fluorine, etc. Craftsmanship.
The process flow of water purification treatment: raw water pretreatment---coagulation sedimentation or clarification---filtration---disinfection
On the morning of x, month x, 20xx, we came I came to study at the No. 1 Sewage Treatment Plant in XX City. The plant mainly treats domestic sewage in xx urban area. The sewage from this sewage treatment plant mainly collects the domestic sewage from the urban area of ??xx in different areas, and then mixes the sewage through gravity flow and retains it in the plant for treatment. The plant treats domestic sewage in the following six categories: garbage, sediment, organic matter, phosphorus, nitrogen, and coliform bacteria.
The process flow of wastewater treatment in this plant mainly consists of three parts: 1. Pretreatment of domestic sewage 2. Treatment in biological pool (anaerobic, anoxic, oxygen-consuming) 3. Precipitation.
The process is:
Pretreatment: mainly to remove large particle size substances and also remove some organic substances, such as leaves, plastic bags in the water, and sand. Generally, grating rooms (coarse and fine), grit chambers, and settling tanks are used.
Secondary treatment: the main process of removing organic matter, using many processes, such as traditional activated sludge method, oxidation ditch method, biological filter, biological turntable, biological fluidized bed method, etc.
Third-level treatment: Some main processes are not effective in removing nitrogen and phosphorus, and a semi-process is required to ensure that nitrogen and phosphorus are discharged up to standard. Disinfection must be carried out before final discharge. The method selected is determined by economic conditions, including Chlorine disinfection, ozone disinfection, UV disinfection.
On the afternoon of x month x, 20xx, we arrived at xx Brand Cement Co., Ltd. in xx City. The leader of the factory explained to us the raw materials needed for cement production: limestone, silicate, clay, oil page Yan et al. Its principle: two grinding and one burning.
The main links in the production process are:
1. Crushing and pre-homogenization
2. Raw meal preparation
3. Homogenization of materials
4. Pre-decomposition
5. Burning of cement clinker
6. Cement powdered sugarcane
7. Cement packaging
Cement factory production enterprises are also a high-energy-consuming and high-pollution industry. During the production process, they will emit a large amount of dust and generate a large amount of noise pollution. Therefore, the company introduced an electrostatic dust removal system and a cyclone dust removal system to deal with dust. In dealing with noise, centralized control and sealing control methods are used to reduce noise pollution to the environment.
Through this trip to various factories, we can further understand the application of our professional knowledge in production practice, allowing us to further deepen our understanding of professional knowledge. At the same time, we are also wary that only by learning professional knowledge well can we meet the requirements for this job in the future. In order to have more employment opportunities in the future, I will work harder to expand my horizons, learn more practical knowledge, and deepen my knowledge of knowledge outside of my major.
Part 2
I have been studying environmental engineering for almost a year, but I am still very vague about the work I will do in this major in the future. Through this understanding and internship, I have become more familiar with this field. Have a general understanding of the work required by the major.
1. Purpose of internship:
Understanding that internship is a very important practical part of students' university studies. Internship is a required course for every college student. It not only allows us to learn a lot of knowledge that we cannot learn in class, but also broadens our horizons and increases our knowledge, so that we can better apply the knowledge we have learned to practice in the future. Lay a solid foundation at work.
2. The specific content of the internship:
(1) xx Water Conservancy Commission xxx Hydrology and Water Resources Survey Bureau
Internship time: the morning of x, month xx, 20xx
1. Overview:
The xxx Hydrology and Water Resources Survey Bureau is a national second-level monitoring station. It monitors 30 projects. The same level of monitoring station covers the entire xx main stream*** There are 7, mainly responsible for hydrology and water resources survey, main stream and main tributary hydrology, river course, sediment, and water quality basic data collection, in hydrology and water resources monitoring and evaluation, water resources demonstration, water environment monitoring, water quality analysis, water volume calculation, hydrology In terms of weather forecasting, hydrological analysis and calculation, flood control, etc., it has advanced technology and equipment and strong strength.
2. Processing technology:
The monitoring station has many laboratories, which can be divided according to their functions: biochemical room, sterile room, quality control room, digestion room, Balance room, instrument room one, two, and three, atomic fluorescence room, atomic absorption room, meteorological chromatography room, sediment analysis room, and sediment balance room. Each laboratory is equipped with relevant instruments.
The daily monitoring items include five conventional parameters (water temperature, pH, dissolved oxygen, conductivity, turbidity), ammonia nitrogen, chemical oxygen demand, permanganate index, total organic carbon (TOC), Total nitrogen, total phosphorus, nitrate nitrogen, phosphate, cyanide, fluoride, chloride, phenols, oils, heavy metals such as mercury, fecal coliforms, and total bacterial count.
Moreover, the monitoring station is fully equipped, such as GM-0.35 diaphragm vacuum pump, PXD-12 digital ion meter, AA-400 atomic absorption meter, AFS-900 atomic fluorescence spectrophotometer, and gas chromatograph. , mercury meter, oil meter, DDSJ-380 conductivity meter, PHSJ-4A7PH meter, ion chromatograph, UV-754 UV-visible spectrophotometer, 7-225 visible spectrophotometer, AE200 electronic balance, GPI-2 Gas purifier, LDZX-40BI three-dimensional This information comes from secretarial model automatic electric pressure steamer, YXZ automatic constant temperature water bath, PSH525 biochemical incubator, TG16-WS high-speed centrifuge, BOD5 constant temperature incubator, Molecule series ultrapure Water machine, BOD-220B rapid tester, Z-2000 atomic absorption meter and a series of advanced instruments. According to webmaster Gao, there are many instruments worth more than one million yuan.
3. Monitoring station work flow:
Quality system operation → Business contract acceptance → Preparation of plans and procedures → Confirmation of environmental facilities → Confirmation of instruments and equipment to ensure use within the validity period → Confirmation of personnel → Sampling\sample delivery→sample reception and processing→receiving samples and testing according to standards (function instructions)→data and record control→report preparation→servicing customers
(2) xx Hydrological Station
Internship time: the morning of xx, month x, 20xx
1. Overview:
The xx hydrological station is located next to xx. It is known as the national first-level hydrological station in the world. A UNESCO first-level station also occupies a very important position in the world, and its long history also adds a lot of charm to itself. The station was built during the Republic of China and is one of the earliest and most important hydrological stations in my country. It played an extremely important role during the 1998 flood fight. The station has played an important role in hydrology since the day it was put into operation and has left us with a lot of valuable data.
Hydrological stations are grassroots hydrological institutions that observe and collect hydrological and meteorological data on rivers, lakes, reservoirs and other water bodies. The hydrological elements observed by hydrological stations include water level, flow speed, flow direction, waves, sand content, water temperature, ice conditions, groundwater, water quality, etc.; meteorological elements include precipitation, evaporation, temperature, humidity, air pressure and wind. According to the test items, they are divided into hydrological stations that observe water level, flow or other items; water level stations that only observe water level, or also measure precipitation; rainfall stations that only observe precipitation; water quality stations that only measure water quality; and that only measure groundwater. Groundwater well observation station; sediment station for measuring river sediment; evaporation station for observing water surface evaporation and land surface evaporation. China divides hydrological stations into basic stations and special stations according to their nature. The mission of the former is to collect measured data, provide data for exploring basic hydrological laws, and meet the needs of water resources evaluation, hydrological calculations, hydrological intelligence, hydrological forecasting and hydrological scientific research.
2. Process flow:
The station mainly arranges 10 monitoring points on the river surface of one kilometer, collects a sample at a water depth of 30 centimeters, and then starts analysis .
(3) xxx Pass Water Quality Automatic Monitoring Station
Internship time: the morning of x, month xx, 20xx
1. Overview:
In June 20xx, the National Environmental Monitoring Station began to build an automatic water quality monitoring station in Nanjinguan, xx City, to conduct real-time monitoring of the water quality at the xx section of the xx basin. The trial operation started on June xx, 20xx, and it is currently handed over to the station for hosting operation by the National Headquarters. Monitoring items include permanganate index, total organic carbon, ammonia nitrogen, pH, conductivity, turbidity, dissolved oxygen, and water temperature. In 20xx, the station added three monitoring items: total phosphorus, total nitrogen and fecal coliform, making the testing items more complete.
2. Process flow:
By implementing automatic monitoring of surface water, this monitoring station can implement real-time continuous monitoring and remote monitoring of water quality, so as to promptly grasp the status of water bodies in key sections of major river basins. Water quality status, to achieve early warning of major or water pollution accidents in river basins, and to resolve disputes over water pollution accidents across administrative regions. The monitoring frequency of the automatic water quality monitoring station can be continuously monitored or monitored every few hours according to the situation, and managers can set it themselves through the control software Certainly.
Currently, the frequency of sampling and analysis is adopted every 4 hours. Each monitoring can get 6 monitoring results every day. These data are transmitted to the environmental monitoring stations near each site through telephone lines to facilitate the maintenance and management of automatic monitoring. Personnel can keep abreast of its operating status, and the data is transmitted to the China Environmental Monitoring Station via satellite transmission, allowing the national environmental protection management department to promptly understand the water quality status of each key section.
Water quality automatic monitoring technology is a system engineering that integrates analysis instruments, water intake, control, data transmission and processing. The entire water quality automatic monitoring system consists of the following parts:
1. Automatic monitoring The station building;
2. External water collection system;
3. Water distribution system and internal water sample pretreatment;
4. Instrument part;
5. Communication and control system;
6. Central software;
7. Auxiliary facilities.
(4) The sewage treatment station in the xx factory area of ??xx Group
Internship time: the morning of x, month xx, 20xx
1. Overview:
Shuanghui Group is a Chinese enterprise and one of the top 500 in the country. However, there is an undeniable fact that it is also a large polluter. Therefore, my country also has strict standards for its sewage discharge. This time we visited It is a sewage treatment station inside its xx factory area. Although the xx factory is not large, its entire production process contains production wastewater, so it is also a key management unit in xx. Therefore, in 2004, the xx municipal government ordered the factory to build this sewage treatment station, with a total investment of 7-8 million yuan. It was established by Station Manager Lin with a daily processing capacity of 2,200 tons. After treatment, the COD content of the wastewater reaches the national Class I emission standard, less than 100mg/L, and the treatment efficiency reaches 97%-98%.
2. Treatment process:
Activated sludge method, also called biochemical treatment method, is anaerobic and oxygen-consuming. The activated sludge method is the most widely used aerobic biochemical treatment of wastewater. Processing technology.
(5) xx City xx Water Plant
Internship time: the morning of xx, x month xx, 20xx
1. Overview
The The factory was established in the 1970s and completed in the mid-1980s. It uses the tap water production technology of the 1980s, which is a relatively advanced automated technology. There are four water plants in xx City. The first water plant is used by Three Gorges University. It is on the mountain next to the TV Tower. It was established before liberation, but the technology is relatively outdated. The Second Water Plant was built on Yangcha Road in the 1960s. Later, due to the development of xx city, the third and fourth water plants were built successively.
2. Process:
Extract water from Guanzhuang Reservoir, transport it through pipelines to the first-level pump room (water intake pump room), and add chlorine in front of the first-level pump room to kill Algae, plants and shellfish. The water is then sent to the plant treatment system through the primary pump room. Usually after mixing (adding an appropriate amount of aluminum chloride, commonly known as alum) to the source water, reaction, precipitation, filtration, disinfection and other treatment processes, each process is equipped with corresponding structures (such as sedimentation tanks, filters, clean water pools, etc.), and the filter Post-disinfection generally involves adding chlorine and ammonia. The water with the disinfectant added passes through the clear pool and stays in the pool for about an hour before it becomes qualified drinking water. It is then pressurized and transported to the city through the secondary pump room (water transfer pump room). In the pipe network, it is used for domestic drinking and production.
(6) Yihua Chemical Industry
Internship time: morning of xx, 20xx year
1. Overview:
The factory This is the last stop for our internship, and it is also an important stop, because the treatment of waste gas is also an important part of our environmental engineering major. The exhaust gas treatment device in the factory is quite advanced, with a dust removal rate of up to 95%.
2. Process:
Desulfurization and dust removal. First, electrostatic precipitator is used. Electrostatic precipitator is a method that uses electrostatic force to separate suspended particles from the air flow, and the energy consumption for separating dust particles is low. Generally, the power consumption for processing 1000m3/h of dust-containing gas is only 0.1-0.8kw. .H, the air pressure loss is also very small. Because the relatively large electrostatic force acts on the particles, even extremely small particles can be effectively captured, so the dust removal effect is very good, with a dust removal rate of more than 95%.
3. Internship summary:
After passing this internship, I have a preliminary understanding of environmental engineering and am full of hope for my employment prospects. Because human survival depends on the environment, and the important task of protecting the environment is about to fall on our shoulders, we must study professional knowledge seriously and master the professional knowledge we have learned, hone ourselves in practice, and make the professional knowledge we have learned You can integrate knowledge, know how to apply what you have learned, and become a qualified environmental worker and a qualified environmental engineer!
Part Three
1. Purpose of Internship
Through this internship, we will combine the theoretical knowledge in the classroom with the actual practice, and understand the relationship between them. similarities and differences, and a clearer understanding of the gap between theoretical learning and practical operation.
As we all know, production internship is a very important practical part of students’ university study. Internship is a required course for every university graduate. It not only allows us to learn a lot of knowledge that we cannot learn in the classroom, It also broadened our horizons, increased our knowledge, and laid a solid foundation for us to better apply the knowledge we have learned to practical work in the future. Through production internships, I have more in-depth contact with professional knowledge, further understand the reality of environmental protection work, understand the problems existing in the environmental governance process and the difficult issues that conflict between theory and practice, and through writing internship reports, I learn to comprehensively apply what I have learned. Learn knowledge and improve your ability to analyze and solve professional problems.
2. Internship content arrangement
1. Kunming Second Sewage Treatment Plant on June 7, 20xx
2. Lin on June 8, 20xx Vocational college campus waste investigation and treatment plan design
4. Wujiatang Wetland Park, Guandu District, Kunming City on June 10, 20xx
5. Summary of the internship on June 11, 20xx And the production of PPT summary of internship content
3. Arrangement of internship team members
Team leader:
Team members:
4. Internship content
(1) Sewage treatment plant visit and study
1. Internship time: 8:00-14:00
2. Internship location: Guannan, Kunming City Dadao Kunming Second Sewage Treatment Plant
3. Internship content
On the morning of June 7, we gathered in front of the school training building and then the school bus took us to the sewage treatment plant and entered After the factory, we first visited the display wall of various data located in the lobby of the office building, and then went to the large conference room. The chief engineer of the factory gave us a detailed explanation of the factory's process flow and theoretical knowledge of practical operations. Afterwards, we all The students were divided into two groups and two projects led us on a tour of the entire factory. During the visit, when we encountered problems, we immediately asked the engineers questions, and the engineers patiently explained them to us.
Kunming Second Sewage Treatment Plant was completed and put into use in 1995. The plant is located on Guannan Avenue and is mainly responsible for treating domestic sewage from residents around Guandu District. The designed water treatment capacity reaches 100,000 tons/day. ,
The treated water quality can meet the national standards and implement the GB18918-2002-Class A B standard, and the treated water is discharged to Panlong River. This sewage treatment plant uses the A2/O process.
The plant’s effluent and inlet water indicators also have clear indicators according to relevant national regulations. Inlet water quality: BOD=180mg/LSS=250mg/LT-N=45mg/LT-P=5mg/ L, effluent quality: BOD15mg/LSS15mg/LT-N8mg/LT-P1mg/L.
1. Water inlet pump room
Function: Raising the height of sewage creates a height difference from high to low in the subsequent processes, allowing for smooth operation.
The water inlet pump of the second plant uses five submersible sewage pumps. The flow rate of a single water pump is 0.43m3/s, 4 are in use and 1 is in standby. The PLC system can control the start and stop of the water pump according to the water level, and can also make the pump run in an alternating manner. The outlet pipe of one of the pumps is equipped with an electronic control valve, which can play a fine-tuning role in controlling the water level. If the incoming water volume is greater than the design flow rate and the water level rises abnormally, it will overflow through the overflow channel. The overflow water level is 3.40m.
2. Grille
Function: The main equipment installed in the sewage treatment project is the grille machine, which is used to intercept and remove floating objects in the sewage.
The setting of the second factory: a coarse grid well, divided into two grids, each grid is 2m wide and 9m long. The front pool on the north side is equipped with a fixed grille, which uses a chain-driven grating machine with rake teeth to move the dirt on the grille; the front pool on the south side uses a chain-driven, continuous-screening flipping grille. The coarse grid of the sewage plant: the coarse grid spacing is 40mm; the fine grid: the grid spacing is 6mm. The coarse grid of the sewage plant adopts an operation mode that starts every 30 minutes.
3. Grit tank
Function: The grit tank removes mud and other suspended solids in sewage through the principle of gravity sedimentation. The sedimentation tank is generally equipped with a mud scraper, which runs continuously at a very slow speed.
Settings of the Second Plant: The grit chamber used in this sewage plant is a horizontal flow grit chamber. The vortex flow in the pond is very large, and a loud sound of water flow can be heard above it.
4. Anaerobic tank
The sewage from the grit chamber is mixed with the return sludge accounting for 5% to 10% of the water input, and then enters two parallel anaerobic tanks. There is a vertical mixer on the top of each grid, and the volume of each group of pools is 4426.1m3. The residence time of the anaerobic tank is approximately 2.12h (Q=10104m3/d) and 1.42h (Q=15104m3/d).
The effluent mixture from the anaerobic tank flows through the water distribution well to four circular nitrification and denitrification tanks with a diameter of 70m.
Activated sludge is a flocculent sludge whose main component is microbial aerobic bacteria. Sludge concentration indirectly reflects the number of aerobic bacteria. It can intuitively understand the growth of aerobic bacteria and also provides a basis for determining the amount of return sludge.
Whether there is enough oxygen in the aerobic zone is crucial to whether the nitrification reaction can be completed. At the same time, oxygen is also a key factor in whether aerobic bacteria can live normally.
5. Concentric circle activated sludge method
This part is the most important treatment structure in the sewage treatment project, providing places and conditions for the biological treatment of sewage.
In the A2/O treatment process visited this time, the biological treatment tank is divided into three areas: anaerobic, anoxic and aerobic. Since the process conditions of each zone are different, the types of microorganisms that grow are not exactly the same, so the processing functions of each zone are different. Through these different functional combinations, the purpose of phosphorus and denitrification is achieved.
The sewage from the denitrification area continues to enter the nitrification area (or aeration area) outside the pool. The nitrification zone is oxygenated with a rotating brush. In addition to oxygenating, the rotating brush also has push flow and mixing functions. Control the mixed liquid that flows back from the nitrification zone to the denitrification zone, and the reflux ratio is 400%.
6. Sedimentation tank
Specifications: The water distribution well of the sedimentation tank flows to four sedimentation tanks respectively, each tank has a diameter of 53m; the effective volume is 4961.4m3; the total height is 8.25m; hydraulic retention time 4.76h (Q=10104m3/d) or 3.17h (Q=15104m3/d), the surface load of precipitation is 0.47m3/(m2/h).
7. Sludge treatment
Return sludge pump room: The return sludge pump room adopts a semicircular annular layout plan. The inner diameter of the pump room is 6.9m and the outer diameter is 12.5m. It collects sludge. The pool area is 43m2
The remaining sludge pumping room: The remaining sludge pumping room is equipped with a sludge pool of 6.75m4.5m2.64m. There are three submersible sewage pumps in the pool. The lifted sludge is transported underground. The pipeline is discharged to the sludge concentration tank for sludge treatment. The operation of the pump is controlled by a timer, and the flow rate of each pump is Q=1550m3/d.
The equipment for sludge treatment in the second plant only includes: conditioning tank, sludge feed pump, dosing system, dosing tank, dosing pump, belt filter press, and filter press. The treated sludge will be dehydrated for you and transported out. The sludge will be transported to a garbage treatment plant on the outskirts of Kunming for landfill treatment.
After the visit to the sewage treatment plant, we gained a lot. The learning in the classroom was mainly based on theoretical knowledge. This kind of internship allowed us to closely combine theoretical knowledge with practice. Let our classroom knowledge be more comprehensive and concrete.
(2) School waste investigation and treatment method design
1. Internship time: June 8, 9:30 am to 4:00 pm
2 , Internship location: Mainly campus garbage gathering points
1) Garbage generated by students and teachers
General classification: iron cans, aluminum cans, glass bottles, plastic bottles, Aluminum foil packages, batteries, etc.; Paper: newspapers, books, magazines, paper cups, packaging cartons and oil-free waste paper, etc.; Used clothes; Disposable tableware: disposable lunch boxes, chopsticks, instant noodle boxes, etc.; Plastic bags: Plastic bags of various materials and packaging bags for various foods, etc.
2) Garbage generated by the college cafeteria
Leftovers from various students’ meals and a large number of disposable tableware (lunch boxes and disposable chopsticks); cinders, various Food processing waste and various washing water, etc.
3) Other types
Construction debris and waste materials generated at various construction sites; various types of garbage and students left in and out of vehicles; remaining cigarette butts, etc.
We collected and investigated various garbage collection points on campus and conducted a general survey of types.
For general garbage, because there are various debris in the general student garbage, it needs to be cleaned up before further processing. First, the collected garbage is manually cleaned to remove recyclable plastic bottles, iron, aluminum cans, discarded books, ironware, etc., which can be sent to the waste collection station in exchange for a certain economic value; the remaining garbage can be manually screened again , where conditions permit, garbage of a certain size can be mechanically screened for further sorting; the remaining garbage is generally directly sent to designated locations for landfill or incineration.
For resource waste, we must recycle and reuse as much as possible.
Through the investigation, we learned about the garbage disposal situation on campus and the entire later treatment situation.
(3) Reclaimed water treatment station
The scale of our school’s reclaimed water treatment station is relatively small. The sewage treated mainly comes from domestic sewage from boys’ and girls’ apartments and from the new library. Domestic sewage and domestic sewage from the school training center. Part of the treated gray water is reused for greening and watering flowers, and part is reused for toilet water in apartments and dormitories.
The school’s reclaimed water treatment method is also relatively simple. The entire visit only took about 15 minutes.
In this reclaimed water treatment process, several pieces of equipment were not used. to daily water quality treatment operations, such as membrane reactors and contact disinfection tanks. These are because the cost of equipment operation is too expensive to be put into practical use.
(4) Wujiatang Wetland Park
1. Internship time: June 10, 8:00 am 14:30 pm
2. Internship location ：Wujiatang Constructed Wetland Park, Wujia Township, Guandu District, Kunming City
3. Internship content:
Wujiatang Wetland Park is located in Liujia Township and Xiaobanqiao, Guandu District, Kunming City Within the territory, it reaches Baoxiang River in the south, Wujia River in the north, and Dianchi Lake in the west. It is mainly composed of water surface, tidal flats and swamps, covering an area of ??about 1,300 acres. Construction started on March 15 this year and is the first wetland park in Kunming. The former barren tidal flats reproduce the beautiful scenery of Dianchi Lake with green feathers and red clouds, willows in three springs and hibiscus in nine summers.
Wetlands play an irreplaceable role in sewage treatment compared with other rapid water treatment technologies. Wetlands, with their unique functions of adsorbing, degrading and removing pollutants, suspended solids and nutrients in water, It is the conversion of potential pollutants into resources. This transformation process affects the ecological cycle system simultaneously through three forms: physical, chemical and biological. Moreover, the ability of the wetland itself to beautify the environment and evolve the air cannot be achieved by other treatment technologies.
There are different divisions of wetlands in this province: according to the construction principle, there are artificial wetlands and natural wetlands, but generally speaking, they refer to swamps regardless of whether they are natural or artificial, permanent or temporary. Areas of land, wetlands, peatlands or waters with bodies of water, either static or flowing, fresh, brackish or salty, including waters whose depth at low tide does not exceed six meters.
In the international wetland protection list, my country has 36 wetlands included in its protection list, including 4 in Yunnan. It can be seen that in Yunnan we have rich wetland resources and the rich animal and plant resources brought by the existence of wetlands. Wetlands have a very good effect in purifying sewage, are of extraordinary significance to environmental protection, and are also of great significance to the protection of biological diversity. Protecting wetland resources has also become an important task for our environmental workers.
Wetland treatment methods mainly include: physical action, chemical action, and biological action to carry out evolutionary treatment of sewage. The physical effect is mainly the filtration, sedimentation and adsorption of wetlands; the chemical effect is mainly the organic microorganisms adsorbed in the pores of the wetland to provide an acidic environment, transform and degrade heavy metals in the water; the biological effect includes microbial action and plant action, the former refers to the wetland soil And hygiene in the rhizosphere soil such as the degradation of pollutants by bacteria, the latter refers to the role of large plants such as aloe vera, calamus and algae in absorbing nutrients from sewage during their growth, thereby purifying it. Biological action is the main way of wetland environmental purification function.
Wujiatang Wetland Park is mainly divided into five areas: 1) Original ecological wetland protection area; 2) Artificial wetland protection area; 3) Wetland display area; 4) Native plant landscape area; 5) Entrance functional area; 6) Water center area; 7) Wetland plant cultivation base; 8) Park supporting facilities area.
5. Internship Summary
The one-week internship ended quickly. Although the time was short, I still felt that I had gained a lot. On the last day of the training week, we summarized and recalled the week's internship, and recalled the entire internship process with the students by making a PPT presentation. In the internship summary, our group achieved good results. To this end, We are all very happy.
Throughout the internship process, the summary of the gains is as follows:
1. Mentality change
School life is relatively It is relatively simple, and we don’t need to worry about many problems. In the three-point and one-line life of the school, it is enough to keep up with the study, but in actual operation, this is not the case. In reality, we have to consider more and timely Changing our mindset will make our work run more smoothly.
2. Plan to do things.
With a clear plan, the goals will be clear, so that you will not be at a loss at work. During our internship, we followed the teacher's arrangements step by step, but before that, the teacher's preparation was very hard and meticulous. It is precisely because of this that our practical training was organized and arranged smoothly. Comprehensive and meticulous planning, this is what we need to learn from the teacher in addition to the knowledge in the textbook.
3. Don’t ignore things that are too small.
There are different stages in doing big things and small things. If you want to do big things, you must do small things well. We are in the internship stage, and it is necessary to do some tedious little things. These little things are worth doing. Although the matter is small, the process is crucial.
Although the one-week internship was very short and the things I learned were very limited, it was enough for me to realize that only through continuous efforts and learning more knowledge can I gradually improve myself and improve myself.