Phosphor recovery crystallization reactor and phosphor recovery method

Abstract

The invention relates to a phosphor recovery crystallization reactor and a phosphor recovery method. The reactor is in inner-outer dual barrel structure, wherein the inner barrel is disposed at the center position of the outer barrel. The reactor includes an aeration stripping area, a crystallization reaction area, a precipitation separation area, a high concentration phosphor mud area and a buffering area, wherein the crystallization reaction area communicates with the precipitation separation area through the upper portion of the buffering area, so that the sewage water after the crystallization reaction in the crystallization reaction area flows into a precipitation separation area without affecting the high concentration phosphor mud area. The invention fully utilizes effective ingredients in the anaerobic treated water of the high concentration waste water of domestic animal and poultry, enhances pH value of the anaerobic treated water by aeration stripping, removes phosphor in the form of crystal of ammoniomagnesium phosphate using relatively high concentration of phosphor and ammonian in the waste water of domestic animal and poultry. The total removal rate of the phosphor can reach 50-60% without any chemical agents added. Phosphor is recovered in form of crystals, which is beneficial to utilization of the recovered phosphor.

Description

technical field [0001] The invention relates to a device for treating livestock and poultry wastewater and recovering phosphorus resources, in particular to a crystallization reactor for phosphorus recovery and a method for efficiently recovering phosphorus from livestock and poultry wastewater. Background technique [0002] The treatment of livestock and poultry wastewater is one of the most important components in environmental governance. At present, the treatment of livestock and poultry wastewater is mainly based on terminal treatment and standard discharge. At the same time, part of the energy—biogas—is recovered through anaerobic treatment during the treatment process. In recent years, with the increasing depletion of phosphorus and other mineral resources, people have begun to pay attention to the recovery of phosphorus and other mineral resources in wastewater. The theory and technology of phosphorus recovery have also been developed to a certain extent. At presen...

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However, these reactors have not been used in actual engineering

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