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Phosphorus enrichment method and system based on membrane bioreactor

A membrane bioreactor and enrichment technology is applied in the field of phosphorus enrichment methods and systems to achieve the effects of reducing sludge discharge, ensuring clarity and extending service life

Pending Publication Date: 2021-06-25
HOHAI UNIV
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Problems solved by technology

In addition, these three methods require facilities such as anaerobic digesters and incinerators

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  • Phosphorus enrichment method and system based on membrane bioreactor
  • Phosphorus enrichment method and system based on membrane bioreactor
  • Phosphorus enrichment method and system based on membrane bioreactor

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Embodiment Construction

[0024] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] The present invention designs a phosphorus enrichment method based on a membrane bioreactor, cultivating phosphorus accumulating bacteria in the membrane bioreactor; the membrane bioreactor operates alternately under aerobic and anaerobic conditions, and accumulates phosphorus under aerobic conditions The bacteria absorb phosphorus in the influent, and the phosphorus accumulating bacteria release phosphate to the enrichment tank under anaerobic conditions to enrich phosphorus. In the aerobic stage, the incoming water is phosphorus-containing wastewater such as domestic sewage and industrial wastewater; under anaerobic conditions, the incoming water is the phosphorus-rich concentrate in the enrichment tank. In the aerobic stage, phosphorus-containing wastewater is pumped into the membrane bioreactor, and after the process of phosphoru...

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Abstract

The invention discloses a phosphorus enrichment method and system based on a membrane bioreactor. The method comprises the following steps: phosphorus-accumulating bacteria is cultured in a membrane bioreactor; and the membrane bioreactor alternately operates under aerobic and anaerobic conditions, phosphorus-accumulating bacteria absorb phosphorus in inlet water under the aerobic condition, and the phosphorus-accumulating bacteria release phosphate into an enrichment tank to enrich phosphorus under the anaerobic condition. The phosphorus enrichment method and system can be directly used for enriching phosphorus in domestic sewage and industrial wastewater to reach the phosphorus concentration standard of recycling phosphorus by a crystallization method, the existence of the membrane module can reduce the outflow of sludge, and meanwhile, the phosphorus-accumulating bacteria are intercepted and completely retained in the membrane bioreactor, so that phosphorus absorption / release is smoothly carried out. Meanwhile, the pollution of the membrane can be greatly reduced under the aerobic / anaerobic alternate operation, and the service life of the membrane is prolonged.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a phosphorus enrichment method and system. Background technique [0002] Phosphorus is polluting and scarce. As of 2019, the world's total phosphate rock reserves are about 50 billion tons, while the economic reserves are less than 18 billion tons. According to the current mining speed, the usable life of global phosphate rock resources is less than 70 years. Moreover, the phosphorus recovered from municipal wastewater treatment plants can meet 15-20% of the phosphorus demand. Phosphorus in sewage treatment plants will become an important place for phosphorus resources. [0003] At present, in the existing phosphorus recovery process, the enhanced biological phosphorus removal system is based on the suspended activated sludge method. Phosphorus is recovered from the excess sludge through the phosphorus flow measurement process. There are three main methods for recover...

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Application Information

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IPC IPC(8): C02F3/30C02F9/14C02F3/34C02F101/10C02F1/52
CPCC02F3/301C02F3/34C02F1/52C02F2101/105C02F2203/006C02F2303/14C02F2001/5218
Inventor 朱亮章豪陈琳张伟何福东姜龙杰
Owner HOHAI UNIV
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