Method for extracting phosphorus from urban excrement

A feces and urban technology, applied in the direction of chemical instruments and methods, phosphate, phosphorus oxyacids, etc., can solve the problems of phosphorus pollution, eutrophication, damage to the balance of nature, damage to the living environment, etc., to achieve high treatment efficiency and solve the problem of rich Nutritization and the effect of protecting the natural environment

A feces and urban technology, applied in the direction of chemical instruments and methods, phosphate, phosphorus oxyacids, etc., can solve the problems of phosphorus pollution, eutrophication, damage to the balance of nature, damage to the living environment, etc., to achieve high treatment efficiency and solve the problem of rich Nutritization and the effect of protecting the natural environment

CN102815824BActive Publication Date: 2013-11-06BEIJING CENTURY GREEN ENVIRONMENTAL ENG &TECH +2
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  • Method for extracting phosphorus from urban excrement

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Embodiment Construction

[0018] The specific embodiment of a method for extracting phosphorus from urban excrement of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] As shown in Figure 1, a method for extracting phosphorus from urban excrement of the present invention, its process route design is mainly: release phosphorus into the liquid, then separate and recover from the liquid, wherein a part of phosphorus is originally present in the liquid , the other part is released from the sludge, which can maximize the recovery of phosphorus, and obtain high-quality phosphorus compounds through crystallization recovery, and the products of the process can be discharged up to the standard or enter the subsequent treatment process.

[0020] The first step of solid-liquid separation: input the feces into the solid-liquid separation device, separate the solids >20mm in the feces, and discard the separated solids >20mm to the landfill. The solid conten...

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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...

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Application Information

Patent Timeline
06 Nov 2013
Publication
CN102815824B
IPC
C02F9/04; C02F11/00; C01B25/26
Inventors
王绍康; 王海山