Alkaline and residual sludge coupled carbon cyclone releasing method and device

Abstract

The invention relates to an alkaline and residual sludge coupled carbon cyclone releasing method and device. The alkaline and residual sludge coupled carbon cyclone releasing method includes the steps of 1), using alkali dreg wastewater to regulate the pH (potential of hydrogen) value of residual sludge to pre-treat the residual sludge with alkali; 2), further cracking and treating the residual sludge through cyclone releasing of carbon and regulating cracking strength through the reflux ratio of cyclone; 3), subjecting supernate of the residual sludge of the cracking treatment to pH regulation prior to hydrolytic acidification, wherein alkali process regulation is accompanied with the hydrolytic acidification process; 4), precipitating the residual sludge subjected to hydrolytic acidification and draining out the supernate to supplement the carbon source. The invention further provides the alkaline and residual sludge coupled carbon cyclone releasing device.

Description

technical field [0001] The invention belongs to the field of resource utilization of activated sludge, and relates to a novel method and device for harmlessly treating residual sludge of an activated sludge process by a combined mechanical and chemical method, and utilizing the processed product as a resource. Specifically, it relates to a new combined process of using swirl cracking to pretreat excess sludge in an alkaline environment to promote its hydrolysis and acidification and use it as a biochemical carbon source, and a device for realizing the method. Background technique [0002] Residual activated sludge is organic matter mainly composed of microbial cytoplasm, and small molecule organic matter such as volatile acids produced during its hydrolysis and acidification process is a good carbon source for nitrogen and phosphorus removal from sewage. The main components of sludge, protein and polysaccharides, are considered to be the main substrates of volatile acids pro...

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Problems solved by technology

2) Ozone pretreatment: Ozone dissolves the extracellular structure and cell wall successively, which can effectively dissolve and oxidize most of the organic matter, improve the proportion of volatile organic matter in the sludge and the biodegradability of the sludge; but the ozone oxidation will dissolve N / P (nitrogen / phosphorus) to increase subsequent removal load

In view of the above-mentioned problems existing in the prior art, so far there is still no suitable industrialization approach, which is a feasible entry point for effectively improving and enhancing the resource utilization of surplus sludge.

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