Method and device for treating organic wastewater with two-phase anaerobic tubular membrane bioreactor

A technology of organic wastewater treatment and bioreactor, which is applied in anaerobic digestion treatment, water treatment parameter control, chemical instruments and methods, etc. It can solve the problems of reactors that are difficult to prevent acidification, reactors and occupying a large area, activity and conversion rate Restrictions and other issues, to achieve the effect of easy automatic control, clean water production, and less labor requirements

Active Publication Date: 2015-04-01
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

These two types of systems are both completely mixed systems. Acidogenic bacteria and methanogenic bacteria with different suitable conditions are completely mixed. The activity and conversion rate of the two bacteria are limited, and it is difficult to prevent acidification in the reactor, especially under high load.
Two-phase anaerobic digestion uses independent reactors to enrich acid-producing bacteria and methanogenic bacteria respectively, so that the activity of the two bacteria and the conversion rate of pollutants are high, and the acidification of the methane phase can still be effectively controlled under high load. But the reactor and occupy a larger area

Method used

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  • Method and device for treating organic wastewater with two-phase anaerobic tubular membrane bioreactor
  • Method and device for treating organic wastewater with two-phase anaerobic tubular membrane bioreactor
  • Method and device for treating organic wastewater with two-phase anaerobic tubular membrane bioreactor

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Embodiment 1

[0062] The membrane circulation reactor is composed of an up-flow composite acid production reactor 1, a completely mixed methane production reactor 2, a tubular membrane module 3, a circulation pump 4, a reactor control system 5 and a gas metering system 6. It is used for Treatment of waste water from agricultural and sideline food processing industry.

[0063] According to the organic load of the two phases (0.5-2.5kgCOD Cr / kgVSS*d) and residence time (0.5-7d), inoculate the anaerobic digested sludge into the upflow compound acidogenic reactor 1 and the complete mixed methanogenic reactor 2, respectively, and then gradually increase the sewage dosage. The inoculum sludge can be derived from the anaerobic digestion process of surplus sludge or other agricultural and sideline food processing wastewater.

[0064] After inoculation, the wastewater from the agricultural and sideline food processing industry pumped in from the water inlet is transported to the up-flow composite ...

Embodiment 2

[0068] The internal membrane circulation reactor is composed of an upflow composite acid production reactor 1, a completely mixed methanation reactor 2, a tubular membrane module 3 and a circulation pump 4, and is used for treating urban sewage.

[0069] According to the organic load of the two phases (0.5-2.5kgCOD Cr / kgVSS*d) and residence time (0.5-7d), inoculate the anaerobic digested sludge into the upflow compound acidogenic reactor 1 and the complete mixed methanogenic reactor 2, respectively, and then gradually increase the sewage dosage. The seed sludge may originate from an anaerobic digestion process of surplus sludge.

[0070] After inoculation, the urban sewage pumped from the water inlet after the sand settling and the membrane grid is transported to the upflow compound acid production reactor, and then passes through the four reaction chambers a, b, c, and d successively, and enters the complete Mixed-type methanogenic reactor; the methane-phase mixed liquid is...

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Abstract

The invention discloses a method for treating organic wastewater with a two-phase anaerobic tubular membrane bioreactor. The method comprises the following steps of: adding anaerobic digested sludge into an up-flow complex acid-production reactor and a completely mixed methane-production reactor in an inoculating way; enabling organic wastewater to flow through all reaction chambers in the up-flow complex acid-production reactor in sequence and enter the completely mixed methane-production reactor, and adding wastewater into the completely mixed methane-production reactor by controlling the gas generation rate and the pH value; enabling a methane-phase mixed solution in the completely mixed methane-production reactor to scour the inner side of a tubular membrane component and flow back to the completely mixed methane-production reactor in a circulating way so as to be mixed hydraulically; separating the methane-phase mixed solution by using the membrane component to obtain effluent and methane gas; and collecting the methane gas at the methane gas outlet of the completely mixed methane-production reactor. The invention further discloses a device for implementing the method. The method and the device can be used for treating high-concentration organic wastewater so that the organic wastewater reaches the standard in a short process, and the method and the device can be also used for treating low-concentration organic wastewater so that the discharge of methane dissolved in effluent as a greenhouse gas can be reduced.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment and new energy, and in particular relates to a short-process treatment method (also known as a process flow) for organic waste water. [0002] The present invention also relates to a device for realizing the above method, more specifically, the device of the present invention refers to a two-phase anaerobic tubular membrane bioreactor. Background technique [0003] As a kind of high-concentration organic wastewater, agricultural and sideline food processing wastewater discharges 11.4% of industrial COD with 6.0% of total industrial discharge Cr Pollutants (Yearbook 2010), typical. Wastewater from the agricultural and sideline food processing industry has high pollutant concentration, large discharge volume and low compliance discharge rate, and the potential for pollution reduction and resource utilization is huge. According to the yearbook statistics, in 2010, the wastewater disch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/28
CPCC02F3/28C02F2209/001C02F2209/003C02F2209/06C02F2209/38C02F2303/20Y02E50/30
Inventor 魏源送郁达伟
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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