Home position strengthening fermentation regenerated carbon source sewage disposal system for sewage plant

Abstract

The invention belongs to the technical field of environment protection, particularly relates to a home position strengthening fermentation regenerated carbon source sewage disposal system for sewage plant. The system comprises structures including a primary adjusting tank, an alkaline fermentation tank, an adjusting tank a carbon source storage and the like tank, and devices including a pipeline, a meter and a dehydration, anhydration control system and the like. Primary sludge, excess sludge and urban utensil garbage from sewage plant are taken as the raw materials for strengthening fermentation to regenerate carbon source in the alkaline fermentation tank under certain temperature and certain pH after being adjusted by the primary adjusting tank, and then chemical agent is added into the adjusting tank, thus not only obtaining high-quality carbon source simply but also obtaining a byproduct which can be used as a fertilizer, and realizing stabilization, reduction, decontamination and utilization of waste sewage. The technique has the advantages of low investment, low running cost, steady quality of regenerated carbon source, high-value byproduct and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an in-situ enhanced fermentation carbon source sewage treatment system of a sewage plant. Background technique [0002] The source of water in our country is relatively poor, but water pollution is becoming more and more serious. In recent years, China's Environmental Status Bulletin shows that the main causes of my country's water pollution include excessive nitrogen and phosphorus emissions. In order to control nitrogen and phosphorus pollution, my country's "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) stipulates that NH in urban secondary sewage plants 4 + -N≤5mg / L, TN≤15mg / L, TP≤0.5mg / L. Although many cities have built sewage treatment plants, due to the relatively low content of organic matter in sewage, the actual effect of nitrogen and phosphorus removal is not ideal, and the effluent often cannot meet the...

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Problems solved by technology

In order to achieve the above purpose, methane production by sludge anaerobic digestion is one of the commonly used processes, but the methane content in the methane gas produced is often not high, and the flammability is not good

Another process is anaerobic sludge digestion acid production process, but due to the low acid production rate under normal conditions and high concentration of nitrogen and phosphorus, this process is rarely used in actual sewage plants

In addition, although it has been reported in recent years that alkaline conditions can improve the efficiency of anaerobic acid production, so far there is no mature process available for wastewater treatment plants.

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