How to Strengthen the Design, Operation and Management of Activated Sludge System

The strengthening design of activated sludge system mainly considers the optimization of process design, the setting of strengthening equipment and the degree of automation.

In terms of process design optimization, due to the late start and rapid development of sewage treatment in China, biochemical treatment processes are mainly used for sewage treatment, and the common processes include contact oxidation, AB method, A/O method, oxidation ditch, SBR, biological aerated filter and directed biological aerated filter.

Diversion biological aerated filter is a new sewage treatment process with independent intellectual property rights in China. According to the different subsequent treatment processes, it can be divided into hydrolysis-diversion biological aerated filter, anaerobic-diversion biological aerated filter, air flotation-diversion biological aerated filter, rapid sedimentation-diversion biological aerated filter, ultrasonic-diversion biological aerated filter, microwave-diversion biological aerated filter, ozone-diversion biological aerated filter and so on.

Combined with the upgrading of old sewage treatment project, nitrogen and phosphorus removal and other processes in reclaimed water reuse, the two-stage diversion biological aerated filter developed AB method-diversion biological aerated filter; A/O process-shunt biological aerated filter; A2/O method-diversion biological aerated filter; Oxidation ditch-diversion biological aerated filter; SBR guided biological aerated filter; Advanced treatment processes such as biological contact oxidation-split aeration biological filter.

Three-diversion biological aerated filter fully draws lessons from eight design methods, such as biological aerated filter method, contact oxidation method, biofilm method, intermittent aeration method, artificial rapid filtration method, precipitation separation method, nitrification and denitrification method and water supply rapid filtration method, and develops a new sewage treatment process and technology by combining two-stage or three-stage sewage treatment process. The diversion biological aerated filter has been used in Beijing, Shandong, Hebei, Guizhou, Shanxi, Sichuan, Inner Mongolia, Heilongjiang, Jiangsu, Jilin, Henan, Hubei, Tianjin, Xinjiang and other places in China, involving sewage treatment in the fields of life, hospital, chemical industry, slaughter, food, flax, alcohol, pharmacy and pickled mustard tuber. A large number of applications have proved that the CODcr of effluent quality is generally below 20mg/L, and the lowest is 5.95 mg/L; Generally, BOD5 is below 10mg/L, and the lowest is 3.50mg/L.: SS is generally below 20mg/L, and the lowest is 6.55 mg/l.

Four-flow biological aerated filter makes sewage aerate twice, precipitate twice and filter twice in the same treatment tank, which solves the technological process that other sewage treatment needs four tanks to complete, especially in the case of continuous water inflow, intermittent aeration is realized, activated sludge returns, and the whole operation does not idle. Its advantages are more prominent than traditional treatment methods, and the treatment effect is particularly remarkable. In August 2009, it was listed as an "innovative project" by the Ministry of Science and Technology; In June 5438+February 2009, the product was listed in the Catalogue of Environmental Protection Technologies Encouraged by the State by the Ministry of Environmental Protection. 20 10 was recognized as "national key new product" by the Ministry of Science and Technology, the Ministry of Environmental Protection, the Ministry of Commerce and the General Administration of Quality Supervision, Inspection and Quarantine in May. 20 12 was listed as "environmental protection technology encouraged by the state" by the Ministry of Environmental Protection in July.

5. In strengthening equipment, biochemistry is the mainstream of sewage treatment in China at present. In the past, it mainly focused on developing biochemical processes. The technical core of biochemical treatment is to cultivate microorganisms. The common biochemical treatment of sewage is to cultivate microorganisms in sewage through aeration. Because the microbial biomass produced by aeration biochemical method can not meet the needs of sewage treatment, three ways are often used in design to make up for the shortcomings of this process: increasing aeration volume, expanding aeration tank and prolonging the long residence time of sewage. However, due to the influence of climate, impact load, water quality and other factors, it is difficult to reach the standard stably, and then the project is upgraded. Some projects have been changed and changed, which is not only costly, time-consuming and laborious.

Microbial generator is a new type of sewage purification equipment developed by fully drawing lessons from the design methods of aerobic biological method, immobilized microbial method and biological addition method. Under the conditions of saving sewage treatment investment, reducing sewage treatment land occupation, saving sewage treatment operation cost, eliminating sewage odor and reducing sludge discharge. This equipment can make the sewage superior to the national standard after advanced treatment, and can be discharged or recycled, and it has obtained the national patent of 20 14.

7. Microbial generator is a waste strengthening equipment in wastewater treatment, which can be used with various wastewater or sewage treatment processes. According to the different follow-up processes, it can be organically combined as follows: AB process-microbial generator strengthening process; A/O method-microbial generator strengthening process; A2/O method-microbial generator strengthening process; Oxidation ditch-microbial generator strengthening process; SBR- microbial generator strengthening process; Contact oxygen method-microbial generator strengthening process, membrane bioreactor-microbial generator strengthening process; Biological aerated filter-microbial generator strengthening process; Biological aerated filter-microbial generator strengthening process and so on.

Eight microbial generators can be used for new sewage treatment projects; It can also be used for upgrading old sewage treatment projects; It can also be used for nitrogen and phosphorus removal and landscape management of rivers, lakes and rivers; Ecological restoration of wetland park; Sewage treatment plant sludge reduction, reclaimed water reuse, high concentration, high ammonia nitrogen, high salt content, heavy metals and other toxic and harmful wastewater treatment fields.

The enhanced treatment process of microbial generator has been applied in Chongqing, Hebei, Guizhou, Jilin and other places in China, involving high-salt wastewater, hospital wastewater, chemical wastewater, slaughter wastewater, food wastewater, pharmaceutical wastewater, printing and dyeing wastewater and other fields. A large number of applications have proved that the CODcr of effluent quality is generally below 20mg/L, and the lowest is 5.95 mg/L; Generally, BOD5 is below 10mg/L, and the lowest is 3.50mg/L.: SS is generally below 20mg/L, and the lowest is 6.55 mg/l.

The microbial generator has the following characteristics:

1, rapidly degrade BOD5, CODcr and TSS, and purify sewage;

2. Improve the removal effect and ability of total nitrogen (TN) and total phosphorus (TP);

3. The treatment efficiency can be increased by about 50%, and the influent load can be increased by about 40%;

4. Respond to the possible emergency failure of aeration tank quickly;

5. Improve the biochemical efficiency of refractory pollutants;

6. There is no need for site reconstruction and expansion, which effectively solves the problem of increased sewage volume or load;

7. Effectively solve the problem of sludge bulking caused by abnormal proliferation of filamentous bacteria;

8. Reduce sludge while treating sewage to achieve the effect of not dredging and removing sludge;

9. It only takes a few days to eliminate the odor in sewage and remove the odor in sewage;

10, using the dominant harmless strains selected in nature or at home and abroad, without the worry of secondary pollution;

1 1. After the pollution is purified, the microorganisms die out due to the loss of life energy and become CO2 and H2O；; ;

12. Uninhibited microorganisms can also be used as bait for fish and plankton; Upgrading the old sewage treatment project, 13, saving investment by 70% compared with other sewage treatment methods;

14, compared with other biochemical treatment methods, it saves about 80% electric energy;

15, and the microbial concentration is as high as 1.8× 1020CFU/ml. The high concentration of microorganisms greatly improves the treatment efficiency, reduces the volume of aeration tank and saves 40% of engineering investment.

16, which solves the technical problem that the number of microorganisms decreases due to climate change and water temperature decrease, thus affecting the sewage treatment effect;

17, the army of microorganisms fought bravely, effectively solving technical problems such as high salt, high concentration, toxicity, harmfulness, chemicals, heavy metals and landfill leachate. Inhibit the growth of microorganisms and make them difficult to survive;

18, to upgrade or expand the old sewage treatment project without changing the civil engineering;

19. Without changing the sewage treatment process, it can effectively remove phosphorus and nitrogen from sewage, improve the effluent quality of treated sewage, and achieve the effect of discharging up to standard or reusing reclaimed water;

20, directly used in the upstream of micro-pollution sources such as rivers and lakes, directly blocking the source of pollution, at the same time effectively controlling micro-pollution, realizing no discharge of sludge, completely innovating the traditional river treatment methods such as dam opening, water cut-off and dredging, and providing ideal equipment for micro-pollution treatment;

2 1, convenient installation, flexible application, simple operation, only one person in charge can complete the task;

22. Flexible layout, small floor space, high degree of automation, simple operation and management, and low operating cost.

In terms of operation management, it is mainly based on automation and automatic supervision. The so-called degree of automation is to realize real-time operation, control, display and alarm of the whole sewage treatment process through the control system, so as to realize intelligent operation and reduce management personnel and labor intensity.

The so-called automatic supervision means intensive management, centralized remote control of equipment, and optimization and concentration of management, testing and technology platforms by region. The factory is mainly for equipment care operation (65,438+0 people), and the remote monitoring and inspection mechanism of the factory. Its advantages are: the number of operators is greatly reduced, and the waterworks with one group of personnel are optimized into three groups of personnel 18 waterworks, which greatly improves the work efficiency and reduces the operation cost.

Intensive management platform includes: information processing platform, sludge disposal platform, equipment control system, factory monitoring system, equipment maintenance system, patrol management system, water sample analysis center, integrated management center, etc.