A method for improving sludge dewatering performance

Abstract

The invention discloses a method for improving the dehydration properties of sludge. According to the method, a biosurfactant and a skeleton builder are used for combined regulation of original sludge. The biosurfactant and the skeleton builder are used for combined regulation so as to improve the dehydration properties of the sludge, so the dehydration properties of the sludge can be substantially improved, the water content of the sludge can be substantially reduced, and the purposes of sludge reduction and reduction in treatment cost can be achieved; the sludge treated by using the method is low in water content and in the content of poisonous and harmful substances and pathogens, and can be used for backfilling and composting or directly used for soil improvement, so a foundation is laid for subsequent treatment and utilization of sludge; and the method is of critical significance to stable, harmless and resourceful treatment of sludge.

Description

technical field [0001] The invention belongs to the technical field of excess sludge treatment in urban sewage plants, and relates to a method for improving sludge dewatering performance, in particular to a method for improving sludge dewatering performance by combining a biosurfactant and a skeleton construct. Background technique [0002] Sludge is a by-product of sewage treatment and is a concentrated and enriched pollutant. Sludge has a high content of organic matter, is perishable, and has a strong odor. Moreover, if sludge that has not been properly treated enters the environment, it will directly cause secondary pollution to water bodies and the atmosphere, posing a serious threat to the ecological environment and humans. Sludge must be treated and disposed of properly before it can enter the ecological environment system. Relevant data show that in 2015, the sewage treatment capacity of my country's urban sewage treatment plants reached 41.03 billion cubic meters, a...

AI Technical Summary

Problems solved by technology

Existing methods to improve sludge dewatering performance mainly include physical, chemical and microbial conditioning methods. Physical methods alone have limited effect on improving sludge dewatering performance, and the treatment effect on sludge with low organic content is poor; chemical methods alone There are problems such as expensive chemicals and increased follow-up dry sludge volume; using microbial conditioning alone has problems such as long time and poor pertinence

Due to the problems of these methods, it is difficult for the existing conventional conditioning agents to simultaneously achieve the goals of reducing sludge dewatering and reducing agent costs

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