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MBR membrane sewage complete sets of equipment
1, project overview
According to the relevant provisions of the state, for protecting the surface water environment from pollution and save precious water resources, the owners adopted construction wastewater recycling of reclaimed water reuse system, treated water is mainly used for ground, and landscape water flushing toilet flushing, landscaping, garage.
Will the domestic sewage reuse for life service.
In understanding life of the drainage and the relevant circumstances, our company for the project of design, the scheme to water quality reach the national "urban sewage recycling - urban miscellaneous water quality standard GB / T18920-2002 and landscape water quality standard for the premise, according to the owners to provide water and effluent requirements and our company for many years of practical experience, the present domestic mature and reliable MBR + disinfection process design. The combination of MBR technology, COD technology, BOD,, ammonia nitrogen, strong processing capacity and excellent water quality, stable characteristics, to ensure the stability of the entire project running, water stability standards.
2, design principles
1, the use of advanced membrane bioreactor wastewater treatment process, to ensure that the indicators of the treatment of water to meet the discharge requirements.
2, sewage treatment station sewage for the living area of the workshop integrated drainage, discharge of the sewage to be treated, and to reach the sewage treatment station after the water requirements, can be incorporated into the sewage treatment system.
3, the sewage treatment station is convenient for operation management, equipment maintenance, while reducing the impact on the surrounding environment.
4, 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.
5, designed to take full account of the secondary pollution of the sewage treatment station, control, for equipment deodorant, vibration and noise reduction, have 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.
6, the sewage treatment system is equipped with emergency bypass and dual power supply and other protective measures.
7, sewage treatment power equipment and other ancillary equipment are the use of domestic well-known manufacturers of products, to ensure stable operation, reliable, reliable.
3, sewage water quality, water quantity and discharge standards
(1) design water quantity
According to the owner of the original information to design.
(2) design of inlet water quality
CODcr: 450mg/L: BOD5 = 250mg / L
PH:6~9 SS: less than 300 mg / L
Escherichia coli: less than 2.4 * 105 / L
(3) discharge standard
After treatment, the effluent of sewage treatment station must reach the GB/T18920-2002 standard of "urban sewage recycling and utilization of urban miscellaneous water quality",
Project | Urban miscellaneous water quality |
CODc r (mg/l) | ≤50 |
BOD5 (mg/l) | ≤10 |
S S (mg/l) | ≤10 |
Total coli group（Number/L） | ≤1000Number |
PH | 6~9 |
4, processing process
According to the above design principles and the design of water quality, water quantity and discharge standards, this project considers the use of advanced membrane bioreactor method (MBR method), the treatment process is as follows:
5, the main role of each unit in the sewage treatment process:
(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) membrane bioreactor (MBR):
In the membrane bioreactor, by the membrane element with a unique structure for combination into membrane soaked in the aeration tank, due to the flat sheet membrane 0.3 micron aperture can prevent bacteria through, so the aeration tank of the zoogloea and free bacteria are reserved in the aeration tank, so as to realize the separation of sludge and water, eliminating the subsequent sedimentation tank, variety of suspended particles, bacteria, algae, COD and organic matter were effectively removed to ensure the effluent suspended solids close to zero the excellent water quality, can be reused directly.
Due to the microfiltration membrane of almost 100% of the bacterial isolation effect, can make the biological concentration in aeration tank to reach more than 10000 mg / L, not only improve the ability of resisting shock loading of the aeration tank, and required aeration tank volume reduced to 1/5~1/8 traditional aeration mode. The reduction of the volume of the pool can greatly reduce the investment cost and operation cost of the biochemical system.
(4) disinfection device
The disinfection method uses the contact type to disinfect, completely kills all kinds of germs.
(5) sludge digestion tank:
Aerobic digestion of residual sludge discharged from the membrane bioreactor was used to reduce the volume of sludge 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.
(6) fan:
Aerobic digestion process for membrane bioreactor, conditioning tank pre aeration and sludge digestion tank.
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