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Method of utilizing phosphorized sludge to prepare culture medium

A phosphating sludge and culture medium technology, which is applied in the direction of culture medium, botany equipment and methods, and planting substrates, can solve the problems of increasing production costs, occupation of public environmental protection resources, and potential resources not being utilized.

Inactive Publication Date: 2019-04-19
ANHUI CHAOHU CASTING FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the presence of heavy metals, phosphating sludge is included in the National Hazardous Waste Catalogue, and the usual disposal method is to transport it to hazardous solid waste landfills for safe landfilling. Not only are potential resources unusable, but it also increases the cost of the enterprise. Production costs and occupation of public environmental resources

Method used

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Embodiment Construction

[0018] The present invention will be further described in detail according to the examples below.

[0019] The invention discloses a method for preparing a medium by using phosphating sludge, and the specific implementation includes the following steps:

[0020] 1. Sludge drying

[0021] The phosphating sludge after pressure filtration is further dried, and the moisture content is reduced to below 40%, so that it can be evenly mixed with the soil. Depending on the specific situation, the waste heat in the phosphating process can be utilized, such as the tail steam of steam.

[0022] 2. Soil mixing

[0023] Phosphated sludge with a moisture content below 40% and ordinary soil are in a ratio of 1:3 to 1:5, and sawdust (volume ratio of 2:1 to 3:1 to the mixed soil), biochar ( The volume ratio to the mixed soil is 5:1~10:1), organic fertilizer (the mass ratio to the mixed soil is 10:1~20:1) and other modified fillers, and the mixed materials are uniformly mixed. Among them, sa...

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Abstract

The invention discloses a method of utilizing phosphorized sludge to prepare a culture medium. The method includes steps: drying sludge: drying the phosphorized sludge after being press-filtered to lower water content to below 40%; mixing with soil: using the phosphorized sludge with the water content below 40% and common soil according to a proportion of 1:3-1:5, adding sawdust, charcoal and organic fertilizer, and uniformly mixing; planting crop: diluting the mixed soil to form a culture medium of 20cm in thickness. The method has the advantage that harmless recycling of the phosphorized sludge is realized.

Description

technical field [0001] The invention relates to a method for preparing culture medium by using phosphating sludge, which is mainly applied in the technical field of environmental protection. Background technique [0002] As a traditional surface treatment process, the discharge of wastewater after phosphating treatment has always been the focus of environmental protection supervision, especially in the severe situation of high eutrophication in rivers and lakes in my country, TP (total phosphorus) and Zn ( Heavy metals such as zinc) all pose a threat to water quality safety. In order to ensure the standard discharge, the phosphating wastewater mainly adopts the coagulation precipitation process, that is, the addition of alkali promotes the soluble phosphate to form insoluble phosphate precipitation, and realizes the simultaneous removal of TP and heavy metals. From the perspective of the life cycle of pollutants, sludge transfer must be safely disposed of after the phosphati...

Claims

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Application Information

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IPC IPC(8): A01G24/20A01G24/23A01G24/10
CPCA01G24/10A01G24/20A01G24/23
Inventor 陈云峰许滢张祥蒋晨晨杜凯
Owner ANHUI CHAOHU CASTING FACTORY