Method used for improving waste active sludge dehydration performance through adding of bacterial broth

Abstract

The invention discloses a method used for improving waste active sludge dehydration performance through adding of bacterial broth. According to the method, aspergillus niger, Pseudomonas aeruginosa, Streptococcus thermophilus, and Rhodococcus rhodococcus are adopted, a fermentation culture solution is prepared from a waste molasses diluted solution and waste active sludge; the fermentation culturesolution is inoculated with the above four microbes respectively at certain ratios, fermentation is carried out for 2 to 5d at 25 to 35 DEG C 160-180r / min so as to obtain a composite bacterial broth;the composite bacterial broth is added into waste active sludge, stirring reaction is carried out for 4h, dehydration is carried out, and after conditioning, sludge water content is reduced to be lower than 50%. The bacterial broth is excellent in adaptability on temperature and pH value, and excellent in flocculation capability, dehydration effect is improved obviously; the method is simple; cost is low; sludge obtained through dehydration treatment can be taken as a plantation substrate or a microbial fertilizer; and sludge resource utilization is promoted.

Description

technical field [0001] The invention relates to the technical fields of environmental engineering and sludge treatment, in particular to a method for improving the dewatering performance of waste activated sludge by adding microbial fermentation liquid. Background technique [0002] In recent years, with the acceleration of my country's urbanization process and the improvement of environmental quality standards, the amount of sewage to be treated has increased sharply. Therefore, various sewage treatment processes such as oxidation ditch, biological filter and oxidation pond have been widely used at this stage, and finally Lead to a large amount of another pollutant (sludge) in sewage treatment. [0003] At present, the treatment and disposal methods of sludge mainly include sanitary landfill, incineration, manufacturing fertilizer, manufacturing building materials, etc., all of which require sludge to be dehydrated and dried, that is, to reduce the moisture content in the sl...

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Problems solved by technology

[0005] The patent of the present invention aims at the poor dehydration performance of sludge in urban and industrial sewage treatment plants and the high cost of subsequent treatment and disposal of mud cakes, and overcomes the economic limitations of conventional physical and chemical means to treat sludge, and provides a method of adding microbial fermentation liquid to condition sludge The method and the waste activated sludge prepared by the method and the application of the waste activated sludge can improve the dehydration performance of the sludge, the cost is low, and the purpose of realizing sludge reduction and resource disposal can be achieved while avoiding problems such as secondary pollution

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