A system and method for anaerobic resource utilization of rural sewage

Abstract

The invention discloses a system and method for utilizing rural sewage anaerobic resources. The system includes an anaerobic membrane bioreaction area, and anaerobic membranes communicating with the anaerobic membrane bioreaction area are arranged on both sides of the anaerobic membrane bioreaction area. The hydrolysis reaction area, the interior of the anaerobic hydrolysis reaction area is divided into at least two upflow reaction compartments by folding plates, and the upflow reaction compartment is provided with two-phase separation packing along the horizontal direction, the anaerobic membrane biological reaction area and the anaerobic hydrolysis reaction area A water distribution system and an aeration system are provided below, and a mud discharge port is provided below the aeration system. The method includes: after the water is distributed by the water distribution system, the sewage flows into the anaerobic hydrolysis reaction zone from bottom to top between the folding plates for primary treatment; the sewage passing through the anaerobic hydrolysis reaction zone flows into the anaerobic membrane biological reaction zone for further treatment, and the sludge is passed through the anaerobic hydrolysis reaction zone for further treatment. The mud outlet is discharged, and the purified water is discharged. The invention has the advantages of simple structure, stable operation, high reaction efficiency, low energy consumption, low cost, easy start-up, simple operation and stable operation and treatment effect.

Description

technical field [0001] The invention relates to a sewage treatment system and method, in particular to a rural sewage anaerobic resource utilization system and method. Background technique [0002] Anaerobic sewage treatment process has a good application prospect in the recovery and utilization of energy resources. BOD in sewage 5 Through anaerobic treatment, it can be converted into biogas and other energy gases. The organic nitrogen in the sewage is converted into ammonia nitrogen through anaerobic treatment. The anaerobic treated sewage contains a large amount of nitrogen and phosphorus elements that can be used for crop growth. If the heavy metals in it are removed In the case of pollution indicators such as ions and pathogenic microorganisms, the effluent can be recycled. [0003] The key to efficient operation of anaerobic wastewater treatment process is the interception and enrichment of anaerobic microorganisms. Because anaerobic microorganisms proliferate slowly,...

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Problems solved by technology

Traditional anaerobic folded-plate reactors have problems such as long start-up time, difficulty in two-phase separation, and unstable treatment effect when treating rural sewage; anaerobic biofilters have fillers that are easy to block when treating rural sewage, low treatment efficiency, and ineffective Suitable for treating high organic load sewage and other problems

Although the anaerobic membrane bioreactor can achieve a better water effluent effect, the problem of membrane fouling still restricts its development and promotion.

Therefore, it is difficult for the traditional anaerobic process to treat rural sewage to achieve the purpose of resource utilization of effluent.

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