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Organic waste water processing method

A technology for organic wastewater treatment and organic wastewater, which is applied in biological water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of unsatisfactory effluent comprehensive indicators and large differences in optimal conditions. and other problems, to achieve the effect of removing organic pollutants, phosphorus and nitrogen removal, high-efficiency chromaticity, and chromaticity removal rate improvement.

Active Publication Date: 2008-03-12
BEIJING ORIGINWATER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Typical anaerobic-anoxic-oxic (AAO, or A 2 O) Nitrogen and phosphorus removal process can remove nitrogen and phosphorus at the same time, but the optimal conditions for the removal of the two are quite different, and because the optimal conditions for aerobic nitrification and aerobic removal of BOD are also quite different, in the same aerobic pool It is difficult to efficiently take into account both reactions at the same time, so that the comprehensive index of effluent is not ideal

Method used

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  • Organic waste water processing method

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Embodiment 1

[0060] Wastewater treatment with a daily treatment capacity of 1,000 tons of organic wastewater.

[0061] Using the existing anaerobic-anoxic-aerobic (A2O) nitrogen and phosphorus removal method, the hydraulic retention time in the anaerobic pool, anoxic pool, and aerobic pool is 1 hour, 4 hours, and 4 hours respectively. The volume ratio of gas to water in the oxygen tank is 6:1, the sludge concentration in the aerobic tank is 4.5g / l, and the sludge load is 0.160kgBOD 5 / kg / MLSS / d, the amount of nitrifying liquid flowing back from the aerobic tank to the anoxic tank is 150%, and the amount of sludge flowing back from the secondary settling tank to the anaerobic tank is 20%. The effluent after treatment is required to be higher than the pollutant discharge standard for urban wastewater treatment plants Class I B (GB18918-2002). The design and operation results are shown in Table 1.

[0062] In the present invention, COD cr Indicates the chemical oxygen demand, which is deter...

Embodiment 2

[0075] Wastewater treatment with a daily treatment capacity of 1,000 tons of organic wastewater.

[0076] Use the organic wastewater listed in Table 1 for treatment.

[0077] The organic wastewater first enters the pretreatment system 1 generally composed of coarse screens, lifting pump rooms, fine screens, grit chambers and ultra-fine screens to remove large particles of impurities present in the wastewater; then 10% pretreatment by volume The waste water enters the first anoxic pond 2, while the remaining pretreated waste water enters the anaerobic pond 3;

[0078] In the first anoxic tank 2, the pretreated waste water was mixed with 50% by volume of the backflow nitrification liquid from the membrane bioreactor 6 for 1.0 hour under the condition of anoxic, and a preliminary denitrification reaction was carried out to obtain The reaction solution then enters the anaerobic tank 3, and is mixed with the remaining part of the pretreated wastewater under anaerobic conditions fo...

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Abstract

The present invention relates to an organic wastewater treatment method of membrane bioreactor, which has dephosphorization and denitriding functions. The method is provided with an oxygen-poor pool before the typical anaerobic-oxygen-poor-aerobic dephosphorization and denitriding method and provided with an aerobic pool adopting integrated membrane bioreactor behind the method. The method of the present invention not only has the advantages of the membrane bioreactor, but also can more completely remove organic contaminations, dephosphorize and denitride as well as eliminate the chroma of yielding water efficiently. The present invention is a method to reach the regenerated water standard of high quality by one time treatment of wastewater.

Description

【Technical field】 [0001] The present invention relates to a wastewater treatment method, and more specifically, the present invention relates to a method of utilizing a membrane bioreactor process with phosphorus and nitrogen removal functions to treat wastewater once to reach the high-quality reclaimed water standard. 【Background technique】 [0002] With the rapid development of my country's economy, the consumption of water resources has doubled. On the one hand, it has caused a shortage of water resources, and on the other hand, it has caused a large increase in wastewater, which has caused tremendous pressure on the sustainable development of society and the environment. A lot of money has been invested in the research of wastewater treatment and its reuse, and great progress has been made in wastewater treatment technology. [0003] The wastewater treatment method using membrane bioreactor is a regenerated water production method developed in recent years. This method or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/28C02F3/12
CPCY02W10/10
Inventor 文剑平杨建州俞开昌梁辉
Owner BEIJING ORIGINWATER TECH CO LTD
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