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Efficient nitrogen and phosphorus removal waste water treatment process and device

A sewage treatment device and a technology for denitrification and phosphorus removal, which are applied in the field of water treatment, can solve the problems of poor nitrification effect, insufficient utilization of carbon sources, and low treatment efficiency of structures, and achieve less sludge deposition, low cost, and large promotion. The effect of applying value

Active Publication Date: 2016-04-20
HUAQI ENVIRONMENT PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a high-efficiency denitrification and phosphorus removal sewage treatment process and its device. The process and its device successfully solve the problems of insufficient carbon source utilization in raw water and the dosage of phosphorus removal agents in the traditional biological aerated filter process. Excessive size, frequent backwashing cycles of biofilter, low treatment efficiency of structures, poor nitrification effect, additional denitrification carbon source, etc. It has the characteristics of high sewage purification efficiency and good water quality, and the device structure is simple and low cost. low

Method used

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  • Efficient nitrogen and phosphorus removal waste water treatment process and device
  • Efficient nitrogen and phosphorus removal waste water treatment process and device
  • Efficient nitrogen and phosphorus removal waste water treatment process and device

Examples

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Effect test

Embodiment 1

[0024] A domestic sewage treatment plant with a treatment capacity of 10,000 m 3 / d, influent COD concentration is 240mg / L, TP12mg / L, NH 3 -N (ammonia nitrogen) concentration is 40mg / L, TN (total nitrogen) is 60mg / L, and suspended solids (SS) is 135mg / L. Sewage is treated sequentially through a flow-type membrane mud coupling tank, a chemical phosphorus removal tank, an aerobic nitrification biological filter, and a clear water tank. The hydraulic retention time of the flow-type membrane-slime coupling tank is 1h, with 4 sets of stirring devices, the carrier filling rate is 50%, and the reflux ratio of the nitrifying liquid is 100%. 1h. The final effluent meets the first-class A discharge standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

Embodiment 2

[0026] A chemical wastewater treatment plant with a treatment capacity of 3,000 m 3 / d, influent COD concentration is 2240mg / L, TP42mg / L, NH 3 -N (ammonia nitrogen) concentration is 90mg / L, TN (total nitrogen) is 600mg / L, and suspended solids (SS) is 635mg / L. Wastewater is treated sequentially through membrane mud coupling pool, chemical phosphorus removal pool, aerobic nitrification biological filter, and clear water pool. The hydraulic retention time of the membrane mud coupling tank is 10h, 5 sets of stirring devices, the carrier filling rate is 60%, the reflux ratio of the nitrification liquid is 300%; the dissolved oxygen of the aerobic nitrification biological filter is 6.0mg / L, and the hydraulic retention time is 12h. Final effluent COD concentration is 150mg / L, TP0.02mg / L, NH 3 -N (ammonia nitrogen) concentration is 2mg / L, TN (total nitrogen) is 65mg / L, and suspended solids (SS) is 8mg / L.

Embodiment 3

[0028] A domestic sewage treatment plant with a treatment capacity of 10,000 m 3 / d, influent COD concentration is 240mg / L, TP12mg / L, NH 3-N (ammonia nitrogen) concentration is 40mg / L, TN (total nitrogen) is 60mg / L, and suspended solids (SS) is 135mg / L. Sewage is treated sequentially through fixed membrane-mud coupling tank, chemical phosphorus removal tank, aerobic nitrification biological filter and clear water tank. The hydraulic retention time of the fixed membrane-mud coupling tank is 2 hours, and the reflux ratio of the nitrification liquid is 150%; the dissolved oxygen of the aerobic nitrification biological filter is 4.0 mg / L, and the hydraulic retention time is 3 hours. The final effluent meets the first-class A discharge standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

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Abstract

The invention discloses an efficient nitrogen and phosphorus removal waste water treatment process and device. The device is formed by connecting a membrane and sludge coupling pond, a chemical phosphorus removal pond, an aerobiotic nitrifying biological filter and a clean water pond in series. A nitrifying liquid reflux system formed by a reflux pump and a reflux pipe is arranged between the membrane and sludge coupling pond and the clean water pond. The membrane and sludge coupling pond comprises a flowing membrane and sludge coupling pond body or a fixed membrane and sludge coupling pond body. The efficient nitrogen and phosphorus removal treatment process is achieved through the steps of hydrolysis, carbon removal and nitrogen removal; phosphorus removal, carbon removal and suspended solid (SS) removal; nitration and carbon removal. By means of the efficient nitrogen and phosphorus removal waste water treatment process and device, the objective of synchronous nitrogen, carbon and phosphorus removal can be achieved, and the advantages of low cost, few sludge deposits, multiplied organisms and the like are achieved at the same time.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a high-efficiency denitrification and dephosphorization sewage treatment process and a device thereof. Background technique [0002] Biological aerated filter (BAF) is a new type of biofilm sewage treatment process developed in recent years. It has the characteristics of high efficiency in nitrogen and carbon removal, small footprint, low operating cost, and no secondary sedimentation tank. However, the biological aerated filter process requires a high concentration of suspended solids in the influent, and requires complex pretreatment, such as commonly used coagulation sedimentation, membrane filtration or other combined processes, which will undoubtedly increase the capacity of the biological aerated filter. The technical process and operation management are difficult, and at the same time, a large amount of organic matter will be removed in the pretreatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F3/2806C02F3/2853C02F3/302C02F3/34C02F9/00C02F2101/105C02F2101/16C02F2101/30
Inventor 郑俊张德伟郑杰
Owner HUAQI ENVIRONMENT PROTECTION SCI & TECH
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