Method for extracting phosphorus from urban excrement

Abstract

The invention relates to a method for extracting phosphorus from urban excrement, in particular to a method for recycling phosphorus from excrement, and relates to the technical field of urban excrement treatment. The method includes processes of excrement solid-liquid separation, flocculation dehydration, copropel and sludge acidification, sludge hydration, phosphorus crystallization recycling and stink deodorization. By the process method, more than 70% of phosphorus in excrement can be recycled, harmless treatment and resource utilization of urban excrement are achieved, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of urban excrement treatment methods, in particular to a method for extracting phosphorus from urban excrement. Background technique [0002] In the daily operation of modern cities, a large amount of waste is generated every day, of which feces account for a large proportion. To deal with such a large amount of feces, it is completely incompetent to use traditional composting methods to digest them. Place replaces. The process used by most manure treatment plants is to first remove impurities from the manure, then separate the solids in the manure for composting, and the separated waste water enters the sewage pipeline for sewage treatment. This process route is very important for the realization of urban The harmless treatment of feces has practical significance. However, there is also a big defect in this process route, that is, there are many useful resources in urban excrement that have not been separ...

AI Technical Summary

Problems solved by technology

However, there is also a big defect in this process route, that is, there are many useful resources in urban excrement that have not been separated, and the separated wastewater still contains a large amount of phosphorus. After being discharged into nature, It will cause phosphorus pollution in nature and eutrophication of water, destroying the balance of nature and thus destroying the living environment of people

[0003] In the prior art, people try to improve the treatment of urban manure through technical means, and some useful components are separated and utilized in the manure treatment field. Its technical scheme is disclosed in the public document of the invention patent application, which is to recover part of the useful resources phosphorus and ammonia in the process of processing animal manure, and the recovery of phosphorus is only enriched on the basis of flocculation and dehydration. Sludge to make fertilizer, no real fine recycling

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