Summary of cognitive practice of environmental engineering

Summary of cognitive practice of environmental engineering

In order to better let us know our major, better grasp the future development direction and participate in the understanding practice, the following is a summary of the understanding practice of environmental engineering for everyone. Welcome to read!

Summary of environmental engineering cognitive practice 1 practice time: x years x months x days -X years x months x days.

The purpose of cognitive practice:

(1) Cognitive practice means that before we have taken a professional course or just finished it, the college organizes us to go deep into enterprises, factories and workshops to know what we are going to learn in advance and what we are interested in, so as to preliminarily define our learning goals.

(2) In order to better understand our major and better grasp the future development direction, the college organized us to carry out cognitive practice. In cognitive practice, I am familiar with some basic industrial processing methods and techniques, understand the operation methods of some commonly used machines, and recognize the methods and efforts of environmental protection in enterprises. It is a rare learning opportunity and experience for us students who are only in the xx tower of our school, which lays a certain practical foundation and accumulates valuable experience for entering the factory in the future.

(3) This internship can cultivate students' concept of integrating theory with practice, increase students' initiative in learning this major, enhance students' ability to observe things, find problems and ask questions, broaden their horizons, enhance their love for the major, and establish a solid career ideal.

Cognitive exercise tasks:

I. Brief Analysis of Domestic Sewage Treatment Process (Xinglin Sewage Treatment Plant) June 25th (Wednesday)

Two. Electroplating Wastewater Treatment Process (Song Lin Bathroom) June 27th (Friday)

Three. Analysis of Chemical Wastewater Treatment Process (Luxiang Petrochemical) June 30th (Monday)

Four. Analysis of atmospheric bag filter technology (3D Silk Environmental Protection Co., Ltd.) July 2 (Wednesday)

Verb (abbreviation of verb) Brief analysis of technological production process (Sanda membrane technology) Cognitive practice content Thursday, July 3:

I Xinglin Sewage Treatment Plant (June 25th)

On Wednesday, June 25th, 20xx, led by the staff of Xinglin Sewage Treatment Plant, environmental engineering 12 class visited Xinglin Sewage Treatment Plant.

Among them, we followed the sewage flow, from the dark water inlet full of various sundries, to the aeration tank and sedimentation tank with surging black water, to the final sedimentation tank of water flow, and finally to the Xinglin sewage treatment plant at the outlet. Sewage treatment processes include grid separation, gravity sedimentation and A2/O activated sludge process. Sewage treatment system includes primary treatment, secondary treatment and sludge treatment. After the harmless treatment of sewage, the water quality can reach the first-class B standard.

The weather is not strong enough today, and the heavy rain in the afternoon failed to stop us from visiting Xinglin Sewage Treatment Plant. The teacher with a microphone and an umbrella explained it carefully to the students. The students jostled shoulder to shoulder, stood on tiptoe and pricked up their ears to listen to the teacher's introduction.

It is understood that A2/O process is an anaerobic-anoxic-aerobic biological nitrogen and phosphorus removal wastewater treatment process, which has a high removal effect on BOD5, ss, nitrogen and phosphorus, so it is also called biological nitrogen and phosphorus removal process.

A2/O process divides the biological reaction tank into anaerobic stage, anoxic stage and aerobic stage. In the anaerobic stage, phosphorus accumulating bacteria in sludge released phosphorus, and BOD5 was partially removed. After entering the aerobic stage, phosphorus accumulating bacteria absorb more and more phosphorus, and sludge becomes high phosphorus sludge. By discharging excess sludge, phosphorus is removed, BOD5 is further removed, and NH3-N is digested. Through the internal reflux of the mixed solution containing nitrate and nitrite, NH3-N will undergo a digestion and denitrification reaction in the anoxic section, so the process has the function of biological nitrogen and phosphorus removal.

A2/O process makes full use of the principles of anaerobic-aerobic phosphorus removal and anoxic-aerobic nitrogen removal.

Aeration tank is a structure for sewage treatment by activated sludge process. Provide a certain sewage retention time in the tank to meet the oxygen demand of aerobic microorganisms and the mixing conditions of full contact between sewage and activated sludge. The aeration tank is mainly composed of tank body, aeration system and water inlet and outlet.

Today's trip to "Xinglin Sewage Treatment Plant" made us gain a lot. We know the process and technology of sewage treatment, and we no longer know nothing about sewage treatment. It laid the foundation for future work.

2. Song Lin Sanitary Bathroom (June 27th)

Song Lin Sanitary Ware Wastewater Treatment Workshop treats electroplating wastewater generated in the production process.

On Friday, June 27th, 20xx, led by Gao and warmly introduced by the engineers of the Science Park, we visited the electroplating workshop and electroplating wastewater treatment workshop of the bathroom.

In the electroplating workshop of Song Lin Bathroom, we learned about the electroplating process as follows:

Wax removal, oil removal, hydrophilization, coarsening, reduction, pre-impregnation, activation, water washing before degumming, water washing after degumming, electroless nickel plating, water washing before coke copper, water washing before acid copper, ammonium persulfate, semi-nickel polishing, full nickel polishing, chromium pre-activation, nickel polishing and back hanging.

The sewage treatment workshop of Song Lin Sanitary Ware Group was completed with a total investment of US$ 2 million, covering an area of 600 square meters, with a daily treatment capacity of1.2000 tons. After sewage treatment, the discharge is reduced and can be recycled, and the recovery rate is over 70%. Sewage discharge is monitored by environmental monitoring station in real time, so that all sewage and pollution are zero. The electroplating workshop discharges the sewage into the sewage treatment workshop for treatment, including copper sludge pool, nickel sludge pool, chromium sludge pool and comprehensive sludge pool. After this understanding and practice, I have a deeper understanding of the choice of sewage treatment methods. Before I went, my understanding only stayed in the book theory, only knowing how to do the electroplating wastewater treatment system, and I didn't know why. Through today's site visit, the engineers patiently explained in detail. I feel that I have a more intuitive contact with the treatment of electroplating wastewater, and I have a higher level understanding of all parts of the system process and the working principle of wastewater treatment. At present, the reserve of professional knowledge is still insufficient. From now on, we should read more professional books, lay a solid professional foundation and lay a deep theoretical knowledge for future work.

3. Luxiang Petrochemical (June 30)

The sewage treated by Luxiang Petrochemical is mainly oil.

Before the visit, Director Huang mainly explained the sewage treatment, the use of sewage treatment devices and the sewage treatment process. Director Huang introduced the anaerobic tank, the first-class aerobic tank, the V-shaped sand filter, the falling water aeration tank and two kinds of membrane groups in turn when he visited the site.

Among them, the water in UASB anaerobic tank is as black as ink, and the water containing activated sludge in the first aerobic tank keeps tumbling. Director Huang said that after anaerobic treatment, COD decreased obviously, and then some SS, COD, cobalt, manganese and iron were removed by V-shaped sand filtration, so that the water could meet the first-class discharge standard.

After this understanding and practice, I have a deeper understanding of the choice of sewage treatment methods. Before I went, my understanding only stayed in the book theory, only knowing the petrochemical sewage treatment process. Through today's on-site visit, Director Huang is not afraid of the hot summer and patiently and meticulously explains. Have a deeper understanding of the basic characteristics of chemical wastewater, the company's environmental protection measures and various units of water treatment, and once again realize the application of ultrafiltration and reverse osmosis technology in practical projects. It is no longer just theoretical knowledge, but real knowledge gained from practice.

Four, three-dimensional silk (July 2)

Three-dimensional silk bag filter.

On Wednesday, July 2nd, 20xx, Mr. Li and Mr. Long led by 12 Environmental Engineering 1 Class visited the bag filter technology research institute and the bag production workshop of 3D Silk Company.

Before the visit, the engineer introduced 3D Silk Company to us. The first thing we visited was the bag filter technology research institute.

This research institute is the first bag research institute in China, which was established by 3D silk at a cost of over 100 million yuan. The research institute has a product development laboratory, a filter material (bag) monitoring center, a working condition simulation platform, a PM2.5 control engineering simulation test platform and a pilot plant. It has a series of comprehensive strengths such as professional and functional filter material development, filter material (bag) performance evaluation, life prediction, failure analysis, working condition simulation experiment, and industry standard formulation. Then we visited the filter bag production workshop and learned how a short piece of fiber became a dust hero.

After this three-dimensional silk trip, I got to know the dust removal tool-dust removal filter material, and deeply understood how it came into being. As the dust removal technology with the lowest emission concentration, bag dust removal is the main force to reduce atmospheric pollutants and plays an important role in reducing pollutant emissions. As students majoring in environmental engineering, we should strive to enrich our knowledge and prepare for the future.

Verb (abbreviation of verb) Sanda movie (July 3)

Sanda membrane produces various membranes and water purifiers.

On Friday, July 4th, 20xx, 12 Environmental Engineering 1 Class visited the membrane assembly exhibition hall, ceramic membrane workshop, sewage treatment and reclaimed water reuse system of Sanda Membrane Company under the leadership of teacher Ye Qian. Before the visit, the engineers popularized the knowledge of the company and the film for us. The first thing we visited was the exhibition hall of the membrane group. We saw ceramic membrane, hollow fiber membrane and flat membrane, and the engineer also demonstrated the water purification process of the water purifier for us. Secondly, we went to the production workshop to see how technicians produce ceramic membranes. Finally, we visited the sewage treatment and reclaimed water reuse system closely related to environmental engineering. The engineer said that the system adopts BIO-CEL flat membrane module MBR system to treat domestic sewage and production wastewater of the factory. Through this understanding and practice, I have a deeper understanding of membrane treatment of water pollution, and know that in addition to the traditional sewage treatment process, emerging and developing membrane treatment technology is more and more loved and popularized by people because of its superior performance. Today, through on-site direct contact and engineer's explanation, I feel that I am very interested in membrane treatment of water pollution, hoping to have a deeper understanding and research in the following study and work.

Summary of cognitive practice:

What you get on paper is so shallow that you never know what you have to do. In two weeks, I got a lot of contacts, feelings and gains. Before we visited the enterprise, the teachers of the college gave us an introduction about the technological process, and the engineers in the enterprise also enthusiastically answered. In just half a month, we not only got to know each other on the next floor, but also increased our knowledge and gained some insights in practical ability. More importantly, let us know what environmental engineering is and why we should study this major, and guide us to think about how to study this major better. This internship is thought-provoking, get rid of impetuous psychology, adjust future planning and make life more directional.

Thank you for arranging so many internship opportunities for us, so that we are no longer confused and confused, have more goals in life, have a more positive attitude, have higher fighting spirit and stronger will, and lead us forward towards our dreams!

Summary of Environmental Engineering Cognition Practice 2 I. Purpose of Practice

Through this internship, I combined the theoretical knowledge in class with the practice of practical operation, understood the similarities and differences between them, and more clearly realized the gap between theoretical study and practical operation.

As we all know, production practice is a very important practical link in students' college study. Internship is a compulsory course for every college graduate. Not only let us learn a lot of knowledge that we can't learn in class, but also broaden our horizons and increase our knowledge, laying a solid foundation for us to better apply what we have learned to practical work in the future. Through production practice, I can get in touch with professional knowledge more deeply, further understand the reality of environmental protection work, understand the problems existing in the process of environmental governance and the difficult problems that conflict between theory and practice, and write an internship report, so that I can learn to comprehensively use what I have learned and improve my ability to analyze and solve professional problems.

Second, the internship content arrangement

1, 20XX June 7, Kunming No.2 Sewage Treatment Plant

On June 8, 2.20XX, the scheme design of campus garbage investigation and treatment in Forestry Vocational College was designed.

4. Wujiatang Wetland Park, Guandu District, Kunming, June 20XX 10

5. 20XX June 1 1 Practice Summary and Practice Content Summary PPT Production

Third, the internship team personnel arrangement

Team leader: # # # # # #

Team members: # # # # # # #

Fourth, the internship content

(1) Visit and study the sewage treatment plant

1. Internship time: 8: 00- 14: 00.

2. Internship location: Kunming No.2 Sewage Treatment Plant, Guannan Avenue, Kunming.

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. After entering the factory, we first visited all kinds of data display walls in the lobby of the office building, and then came to the conference room. The chief engineer of the factory gave us a detailed explanation of the technological process and theoretical knowledge of the actual operation of the factory. Later, all our classmates were divided into two groups, and two projects led us to visit the whole factory. During the visit, we asked the engineer questions in time when we encountered problems, and the engineer patiently explained them to us.

1995 Kunming second sewage treatment plant was completed and put into use. Located on Guannan Avenue, the plant is mainly responsible for treating domestic sewage of residents around Guandu District, with a designed water treatment capacity of 654.38+10,000 tons/day.

After treatment, the water quality can reach the national standard (GB 189 18-2002-I B), and the treated water is discharged into Panlong River. The sewage treatment plant adopts A2/O process.

The effluent and influent indexes of the plant are also clearly defined according to the relevant national regulations. The influent water quality is BOD =180mg/l ss = 250mg/l t-n = 45mg/l t-p = 5mg/l, and the effluent water quality is BOD ≤ 15mg/l SS ≤ 65438.

1, water pump room

Function: To raise the height of sewage is to form a height difference from high to low in the later process, so as to run smoothly.

Five submersible sewage pumps are used for the water inlet pump of the second plant, and the flow rate of a single pump is 0. 43 m3/ s, 4 for use 1 standby. The PLC system can control the start and stop of the water pump according to the water level, and can also make the water pump run alternately. An electric control valve is installed on the outlet pipe of a pump, which can play a fine-tuning role in controlling the water level. If the water inflow is greater than the design flow and the water level rises abnormally, it will overflow through the overflow channel, and the overflow water level is 3.40 m.

Step 2 check

Function: The main equipment installed in sewage treatment project is grid machine, which is used to intercept and remove floating objects in sewage.

The second plant is equipped with coarse grid wells, which are divided into two grids, each of which is 2m wide and 9m long. The front pond on the north side is provided with a fixed grille, and a grille machine with chain drive and rake teeth moving on the grille strip is used to clean the dirt; The front pond on the south side adopts chain drive and continuous screen to filter the flap grid. Coarse grid of sewage plant: the spacing between coarse grids is 40mm; fine grid: the spacing between grids is 6mm; the coarse grid of this plant is started every 30min.

3, grit chamber