Deep dehydration method for solidifying fresh sludge through landfill stabilized sludge incineration residue

Abstract

The invention discloses a deep dehydration method for solidifying fresh sludge through landfill stabilized sludge incineration residue. The method comprises two steps of chemical conditioning and modifying: adding water into fresh sludge to be dehydrated into sludge with moisture content of 80%-85%, conditioning into sludge with moisture content of 90%-93%, adding landfill stabilized sludge incineration residue 10%-30% the weight of the sludge, mixing uniformly; mechanical squeezing and deep dehydrating: pumping the conditioned sludge into a plate-and-frame filter press, deep dehydrating for 1 hour under the pressure of 1MPa. The method has the advantages that due to the utilization of the landfill stabilized sludge incineration residue, the capillary water absorption time of the sludge can be obviously shortened, and the dehydration performance of the sludge can be sharply improved; after filter pressing and dehydrating, the moisture content of the sludge is reduced to be less than 60%; the waste is used for processing waste, the dehydration performance of fresh sludge can be greatly improved, and the landfill stabilized sludge is excavated and recycled.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment and resource utilization, and relates to a deep dehydration method for solidifying fresh sludge by utilizing landfill stabilized sludge incineration residues. Background technique [0002] At present, the main methods of sludge treatment and disposal in my country are composting, sanitary landfill, incineration and land utilization. Among them, sanitary sludge landfill has become the most commonly used method for sludge disposal in my country because of its short construction period, low investment, convenient management, and simple operation. However, with the continuous increase of the sewage treatment capacity of my country's sewage treatment plants, the sludge production continues to increase, which makes the land for urban landfills increasingly tight. In order to ensure the sustainable development of sludge landfills, the land occupied by landfill sludge cannot The avoided need to b...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problems of mining and utilization of existing landfill sludge, high cost of existing sludge dewatering agents, low cost performance, and difficulty in deep dehydration treatment, and to utilize the residual inorganic dehydrating agent content in landfill stabilized sludge High, and after the incineration treatment, the properties are activated and the structure is loose. It provides a deep dehydration method that utilizes the landfill stabilized sludge incineration residue to solidify the fresh sludge.