Sludge discharge system structure between hydrolysis and acidification

Abstract

The invention provides a sludge discharge system structure between hydrolysis and acidification. The system structure comprises a hydrolysis and acidification tank and an aerobic tank which are mutually connected, wherein one side of the aerobic tank is sequentially connected with a first membrane biological reaction tank and a second membrane biological reaction tank, sludge discharge pumps are arranged in the hydrolysis and acidification tank, the aerobic tank, the first membrane biological reaction tank and the second membrane biological reaction tank, and each sludge discharge pump is connected with a sludge discharge pipe through a pipeline. The system structure disclosed by the invention has the effects that the sludge discharge system structure can be suitable for better and more complete operation of an oily wastewater treatment system, the water outlet effect is good, the water quality of oil-containing wastewater after treatment can achieve the first level B standard in discharge standard of pollutants for municipal wastewater treatment plant (GB 18918-2002) for discharge or achieve the requirements of the corresponding standard in urban wastewater recycling and urban miscellaneous water quality (GB 18920-2002) standards for recycling.

Description

technical field [0001] The invention relates to a sewage treatment technology, in particular to a sludge discharge system structure in a hydrolysis acidification room. Background technique [0002] As the core process of this renovation project, MBR technology emerged in the 1980s. In recent years, with the improvement of membrane production technology and the reduction of production cost, in the field of sewage treatment, the MBR process combining membrane technology and bioreactor has received widespread attention in China. It has the advantages of saving land and being easy to realize automation. . [0003] With the renovation of the oily sewage treatment system in Nanjiang Wastewater Treatment Center completed and put into operation, some activated sludge was put into the biochemical pool of the hydrolytic acidification room as its core system, but due to various reasons, the activated sludge was poisoned and its activity was limited. Inhibit the changes in the propert...

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Problems solved by technology

[0003] With the renovation of the oily sewage treatment system in Nanjiang Wastewater Treatment Center completed and put into operation, some activated sludge was put into the biochemical pool of the hydrolytic acidification room as its core system, but due to various reasons, the activated sludge was poisoned and its activity was limited. Inhibit the changes in the properties and groups of microorganisms produced, and the excessive growth of some microorganisms (such as filamentous bacteria) will form a large amount of foam or scum, resulting in excessive foam and scum in the treatment pool, and some water-containing foam and scum will overflow, causing damage to the outer wall of the pool. The installed distribution boxes and instruments cause corrosion, and cause short circuit and damage to the distribution system, posing serious safety hazards

At the same time, the floating sludge is lost with the treated water, which not only increases the amount of suspended solids in the effluent, but also seriously deteriorates the quality of the effluent

Finally, the water quality of sewage treatment cannot meet the first-class B discharge standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) or meet the corresponding standards in the "Urban Sewage Reuse and Utilization of Urban Miscellaneous Water Quality" (GB18920-2002) standards request for reuse

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