Environmental Engineering Professional Understanding Internship Report

One. Internship purpose:
Understanding internships is an important practical part of student university study. Internship is a compulsory course for every college student. It not only allows us to learn a lot of knowledge that we can't learn at all in the classroom, but also allows us to broaden our horizons, increase our knowledge, and apply our knowledge to the real world. Lay a solid foundation in the work.

I have been studying environmental engineering for almost a year, but the work I am going to do in this profession is still very vague. Through this internship, I have already had a general understanding of the work that this profession is going to do.

two. The specific content of the internship:

Yangtze River Water Resources Commission Yangtze River Three Gorges Hydrology and Water Resources Survey Bureau

Internship time: June 20, 2019 morning

1. Overview:

The Yangtze River Three Gorges Hydrology and Water Resources Survey Bureau is a national secondary monitoring station. It monitors 30 projects. There are 7 rivers in the same level of monitoring stations. It is mainly responsible for hydrology and water resources survey, main stream and main tributary hydrology, river channel, sediment, The basic data collection of water quality, advanced in technical and equipment, and strong in hydrological and water resources monitoring and evaluation, water resources demonstration, water environment monitoring, water quality analysis, water quantity calculation, hydrometeorological forecasting, hydrological analysis and calculation, flood control, etc.

2. Process:

The monitoring station has more laboratories, which can be divided into: biochemical room, sterile room, quality control room, digestion room, balance room, instrument one, two, three chambers, atomic fluorescence chamber, atomic absorption chamber, meteorological chromatography. Room, sediment analysis room, sediment balance room. Each laboratory is equipped with associated instruments.

The daily monitoring items include conventional five parameters, ammonia nitrogen, chemical oxygen demand, permanganate index, total organic carbon, total nitrogen, total phosphorus, nitrate nitrogen, phosphate, cyanide, fluoride, chloride, phenols. Heavy metals such as oils, mercury, etc., fecal E. coli, total number of bacteria.

Moreover, the monitoring station is fully equipped, for example, gm-0.35 diaphragm vacuum pump, pxd-12 digital ion meter, aa-400 atomic absorption meter, afs-900 atomic fluorescence spectrophotometer, gas chromatograph, mercury detector, Oil measuring instrument, 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 stereo automatic electric pressure steamer, yxz automatic constant temperature water bath, psh525 biochemical incubator, tg16-ws high speed centrifuge, bod5 constant temperature incubator, Moore element series ultra pure water machine, bod-220b fast tester, z - XX Atomic Absorption Apparatus and other advanced instruments. According to the high stationmaster, there are not a few instruments with a value of more than one million.

3. Monitoring station workflow:

Quality System Operation → Business Contract Acceptance → Planning, Program → Environmental Facilities Confirmation → Equipment Confirmation Guaranteed to be used within the validity period → Personnel Confirmation → Sampling / Sample Delivery → Sample Receiving, Processing → Leading Samples, Standard Test → Data, Record Control → Reporting → Service Customer

Yichang Hydrological Station

Internship time: June 20, 2019 morning

1. Overview:

Located on the banks of the Yangtze River, Yichang Hydrological Station is known as the national first-level hydrological station, the world's first-class UNESCO station, and also plays a very important role in the world. At the same time, its long history has added a lot of charm to itself. Founded in the Republic of China, the station was one of the earliest and most important hydrological stations in China and played an extremely important role during the flood fighting in 1998. Since its inception, the station has played an important role in hydrology and has left us with a lot of valuable data. such as:

July 31, 1153 59.5m August 1, 1227 58.47 m

August 25, 1560 58.45 m July 23, 1788 57.5 m

July 18, 1796 56.81 m July 18, 1613 56.67 m

July 18, 1860 58.32 m July 20, 1870 59.5 m

September 4, 1896 55.92 m August 14, 19XX 55.14 m

July 17, 1921 55.33 m August 10, 1931 55.02 m

September 6, 1945 55.71 m August 7, 1954 55.73 m

The hydrological station is a grassroots hydrological institution that observes and collects hydrological and meteorological data of rivers, lakes, reservoirs and other water bodies. Hydrological elements observed at hydrological stations include water level, flow rate, flow direction, wave, sediment concentration, water temperature, ice conditions, groundwater, water quality, etc. Meteorological elements include precipitation, evaporation, temperature, humidity, air pressure and wind. According to the test items, it is divided into hydrological stations that observe water level, flow rate or other items; water level stations that only observe water level or measure precipitation; rain stations that only observe precipitation; only water quality stations that measure water quality; only groundwater Groundwater well observation station; sediment station for measuring river sediment; evaporation station for observing surface evaporation and land surface evaporation. China divides hydrological stations into basic stations and dedicated stations according to their nature. The former task is to collect measured data and provide information for exploring basic hydrological laws to meet the needs of water resources assessment, hydrological calculation, hydrological intelligence, hydrological forecasting and hydrological research.

1. Process flow:

The station mainly deployed 10 monitoring points on the surface of a kilometer of water, took a sample at a depth of 30 cm, and began to analyze.

Yangtze River Nanjin Water Quality Automatic Monitoring Station

Internship time: June 21, 2019 morning

1. Overview:

In January XX, the National Environmental Monitoring Station began construction of an automatic water quality monitoring station in Nanjinguan, Yichang City, to monitor the water quality of the Nanjinguan section of the Yangtze River Basin in real time. The trial operation began on January 15th, XX, and is currently delivered to the station for operation by the National Terminus. Monitoring items include permanganate index, total organic carbon, ammonia nitrogen, pH, conductivity, turbidity, dissolved oxygen, and water temperature. At the XX terminus, three monitoring projects of total phosphorus, total nitrogen and fecal coliforms were added, making the testing project more perfect.

2. Process:

By implementing automatic monitoring of surface water, the monitoring station can implement real-time continuous monitoring and remote monitoring of water quality, to timely grasp the water quality of key water bodies in major river basins, to achieve pre-alert major or watershed pollution accidents, and to solve cross-administrative areas. Water pollution accident disputes. The monitoring frequency of the water quality automatic monitoring station can be continuously monitored according to the situation or monitored every few hours. The management personnel can set it by the control software. Currently, the frequency of sampling is analyzed once every 4 hours, and each monitoring can get 6 per day. The monitoring results are transmitted to the environmental monitoring stations near the stations through telephone lines, which facilitates the maintenance of automatic monitoring. The management personnel know their operating status in a timely manner, and the data is transmitted to the China Environmental Monitoring Center through satellite transmission to enable the national environmental management. The department timely understands the water quality of each key section.

The automatic water quality monitoring technology is a system engineering that integrates analytical instruments, water intake, control and data transmission and processing. The entire water quality automatic monitoring system consists of the following components:
1. The station of the automatic monitoring station;
2. External water collection system;
3. Pretreatment of the water distribution system and internal water samples;
4. Instrument part;
5. Communication and control systems;
6, the center software;
7. Auxiliary facilities.

Sewage treatment station of Yichang Plant of Shuanghui Group

Internship time: June 22, 2019 morning

1. Overview:

Shuanghui Group is a famous enterprise in China and one of the top 500 in the country. However, it is an undeniable fact that it is also a large emitter. Therefore, China has strict standards for its sewage discharge. This time we visited it. A sewage treatment station inside the Yichang plant. Although the Yichang plant is not large, it contains production wastewater in its entire production process, so it is also a key management unit in Yichang. Therefore, in XX, the Yichang Municipal Government ordered the plant to establish this sewage treatment station, with a total investment of 7-8 million yuan, which was formed by the forest stationmaster with a daily processing capacity of 2,200 tons. After treatment, the cod content of the wastewater reaches the national i-level emission standard, less than 100mg/l, and the treatment efficiency reaches 97%-98%.

2. Process:

Activated sludge process, also known as biochemical treatment, anaerobic and oxygen-consuming, activated sludge process is the most widely used aerobic biochemical treatment technology.

3. Process flow:

The high-concentration wastewater enters from the mountain pool first. The so-called mountain pool is not only a mesh, but also removes the bulky wood in the wastewater; then reaches the primary sedimentation tank; the third step is to adjust the pool, the role is When the water is big, it is impossible for the front to enter inside. It can only stay inside. When there is little water, it will exist in it first. When the water is big, there is still a role of pre-acidification to make the waste water. The ph value is above a certain value; then the wastewater is lifted to the air floatation tank by the pump, and the function is to inflate the waste water to fully consume oxygen, and in the pool, a highly effective disinfectant and a degradation agent are chlorinated. Aluminum, the role is to remove oil, heavy metals and a part of the salt; the fifth step is to the anaerobic tank, the purpose is to remove all the oxygen in the waste water, because some microorganisms can consume other microorganisms without oxygen, anaerobic pool It is to use such a principle to treat other microorganisms in the wastewater; the sixth step is to enter the oxygen-consuming pool, that is, the aeration tank, in order to fully oxygenate the wastewater, and fully activate the activated sludge in the inside. Breeding; seventh step into the secondary sedimentation tank, activated sludge and wastewater play a separate role in the secondary settling tank sludge back to the aeration pond again; and finally into disinfectant pool and then discharged.

Yichang No. 4 Water Supply Plant

Internship time: June 23, 2019 morning

1. Overview

The factory was established in the 1970s and was completed in the mid-eighties. It used the tap water production process of the 1980s, which is a relatively advanced automation process. There are four waterworks in Yichang City. The one water plant is used by the Three Gorges University. It was established on the mountain next to the TV tower before the liberation, but the process is relatively aging. The second water plant was repaired in the place of Yangshuo Road in the 1960s. Later, due to the development of Yichang City, the third and fourth water plants were repaired.

2. Process:

Water is pumped from the Guanzhuang Reservoir, piped to the primary pumping station and chlorine is added in front of the primary pumping station to kill algae, plants and shellfish. The water is sent to the in-plant processing system through the primary pumping station. Usually through mixed reaction, precipitation, filtration, disinfection and other treatment processes, each process is equipped with the corresponding structure, after filtration and disinfection is generally chlorination and ammonia, the water added with disinfectant through the clear water pool, and stay in the pool After about an hour, it becomes qualified drinking water, and then is pumped into the urban pipe network through the secondary pumping station for living and drinking.

Yihua Chemical

Internship time: June 24, 2019

1. Overview:

The factory is the last stop for our internship and is also an important one, because the treatment of exhaust gas is also an important part of our environmental engineering research. The exhaust gas treatment device in the plant is quite advanced, and the dust removal rate can reach 95%.

2. Process:

Desulfurization and dust removal. First, electrostatic precipitator is a method of separating suspended particles from airflow by electrostatic force, and the energy of separating dust particles is low. Generally, the power consumption of dusty gas of 1000m 3 /h is only 0.1-0.8kw. .h, the air pressure loss is also small. Because a relatively large electrostatic force acts on the particles, even very small particles can be effectively trapped, so the dust removal effect is very good, and the dust removal rate is over 95%.

three. Internship summary:

After this internship, I have a preliminary understanding of environmental engineering and I am full of hope for my employment prospects. Because human survival depends on the environment, and the task of protecting the environment is about to fall on our shoulders. Therefore, we must study professional knowledge and master the professional knowledge we have learned, and hone ourselves in practice so that we can learn the majors we have learned. Knowledge can be integrated, know how to apply what you have learned, and become a qualified environmental worker, a qualified environmental engineer!