Technology and special device for extracting humic acids from landfill leachate

Abstract

The invention provides a technology for extracting humic acids from landfill leachate. The technology comprises the following steps: firstly feeding raw water into a pretreatment system so as to adjust the water quality, and then intercepting the humic acids in pretreated yielding water in a concentrated solution by using a membrane separation method so as to form a humic acid concentrated solution, thus finally obtaining the humic acid concentrated solution, the concentration of which is 30-60 times higher than that of the pretreated yielding water. The technology has the advantages that firstly after the landfill leachate subjected to biochemical treatment is treated, the humic acids are extracted from the landfill leachate, can serve as organic fertilizers and raw materials for fertilizer production and have very good fertilizer efficiency, relatively high application value and certain practical application value, and resources are effectively utilized; secondly, the accumulation of organic matters difficult to biochemically degrade in the system is avoided, and the treatment capacity of a biochemical system is not affected; meanwhile, as humic acid waste liquid is extracted and separated out, the back-injection incineration or fly ash solidification or chemical oxidation treatment is not needed, and the treatment cost of the humic acids in the landfill leachate is reduced.

Description

technical field [0001] The invention belongs to the field of environmental protection technology, and specifically relates to a process and a special device for extracting humic acid from landfill leachate. The process extracts humic acid from landfill leachate and realizes resource utilization of landfill leachate. The environment is protected. Background technique [0002] With the increase in the number of cities and the population in our country, urban garbage has also increased rapidly, and the situation of garbage siege has become very severe. At present, landfill and incineration are the main methods of waste disposal, among which landfill is still the main method, accounting for 45%-50%, incineration accounts for about 12%, and there are still 30% of domestic waste that cannot be Compared with landfill, the incineration method can effectively reduce the garbage volume by more than 75%, save land, and is not easy to produce pollution such as sewage infiltration, and ...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a technology and a special device for extracting humic acid from landfill leachate in view of the technical defect that humic acid in landfill leachate cannot be effectively treated, which can extract humic acid in landfill leachate. It is extracted and used as agricultural fertilizer, which not only harmlessly treats the landfill leachate, but also turns waste into treasure and saves resources

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