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Complete sets of sewage treatment equipment
1, engineering survey
New rural construction residential area sewage summary discharge of sewage processing, using AO biochemical treatment process, again after disinfection to the urban sewage regeneration use urban miscellaneous water quality (GB / T18920-2002) standard back part used for watering and greening, part of the discharged into the water body.
Domestic sewage treatment project is mainly civil, installation, equipment, automatic control functions, the use of PLC independent work, the normal work for the full automatic control, when necessary, can be switched to manual control.
2, discharge standard
The effluent after treatment of sewage treatment station must reach the first level B standard of "urban sewage recycling and utilization of urban miscellaneous water quality" GB8978-2002.
Project | Urban miscellaneous water quality |
CODc r (mg/l) | ≤60 |
BOD5 (mg/l) | ≤20 |
S S (mg/l) | ≤20 |
Total coli group（Number/L） | ≤104Number |
PH | 6~9 |
3, design principles
A, using AO biochemical sewage treatment process, to ensure that the indicators of the treatment of water to meet the discharge requirements.
B, sewage treatment station sewage for the hospital's comprehensive drainage, bathing wastewater, etc., the discharge of sewage to be treated, and to meet the requirements of the sewage treatment station, can be incorporated into the sewage treatment system.
C, sewage treatment station is convenient for operation and management, equipment maintenance, while reducing the impact on the surrounding environment.
D, sewage treatment facilities in operation with greater flexibility and adjustability, to meet the water quality, water content, and tries to sewage treatment station covers an area of small, project investment, energy consumption low processing cost less.
E, the design fully consider the prevention and control of the secondary pollution of the sewage treatment station,, for equipment deodorization, vibration and noise reduction, a corresponding measures, sewage treatment produced in the process of the small amount of residual sludge after aerobic digestion process regularly by outsourcing unit cleaning Sinotrans, so as to avoid causing secondary pollution to the environment.
F, sewage treatment system with emergency bypass and dual power supply and other protective measures.
G, sewage treatment power equipment and other ancillary equipment are the use of domestic well-known manufacturers of products, to ensure stable operation, reliable, reliable.
4, processing process
5, detailed engineering:
(1) grid:
Used to ensure the smooth flow of the subsequent pipeline, interception of particles and fibrous material in the sewage. The intercept of the gate slag is regularly removed by artificial. The grid adopts two thick and thin, and is placed in the regulating tank.
(2) sewage conditioning tank:
Used to regulate the water and even water, so that the sewage can be more evenly into the subsequent processing unit. A submersible sewage pump is arranged in the sewage pool, which is used to send the sewage to the following processing unit.
(3) integrated equipment:
Function: biochemical process, the use of microorganisms to remove the organic matter in the sewage.
The anaerobic reaction pool, under anaerobic conditions return sludge and water are fully mixed, poly phosphate bacteria on the release of phosphorus and to absorb in the environment of low molecular acid, in the form of PHB stored in the aerobic environment, poly phosphate bacteria absorb a great amount of phosphorus and phosphorus removal.
Using biological contact oxidation pool, pool of dissolved oxygen and excellent biological bacteria and organic pollutants contact reaction, for organic pollutants in the oxidation of ammonia and phosphorus absorption and removal of creating the best adapted to their environment and improve the organic pollutants and ammonia nitrogen and phosphorus removal efficiency.
Secondary sedimentation tank is mainly meet the contact reaction tank with water outflow sloughed biofilm, free zoogloea, organic impurities of the settlement, in order to achieve satisfactory effect of sedimentation by reasonable design of surface load, settling velocity, the sludge bucket angle, to avoid dead ends, shorten the sludge residence time in the pool, guarantee clarification effect and mud water separation effect.
(4) filter tank:
The sewage is pumped into the filter tank through the sump pump, and the pollutant in the water is further removed through filtration and adsorption of activated carbon in the filter tank.
(5) disinfection device:
The disinfection method uses the contact type chlorine dioxide disinfection, completely kills all kinds of germs.
(6) sludge digestion tank:
Aerobic digestion and stable treatment of the sludge in the tank after biochemical sedimentation to reduce the sludge volume and improve the stability of the sludge. Good after anaerobic digestion sludge quantity is less, regular contact by the sanitation department pumping mud car clearance Sinotrans and sludge dewatering Sinotrans. The supernatant was returned to the regulation pool.
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