Environmental organic nutrient soil as well as preparation technique and application thereof

Abstract

The invention provides an environmental protective organic nutrient soil which consists of municipal sludge, phosphorite powder, the chemical raw material containing Fe<3plus> and the chemical raw material of Ca<2plus>. The environmental protective organic nutrient soil is made by the steps of compressing, stirring, pressing for sieving, crushing, mixing etc. The produced organic nutrient soil is used as the nutrient additive and soil improving agent of the garden plants. The invention realizes the effective combination of the sludge treatment and reutilization, which effectively prevents the secondary pollution caused by the sludge and as well as creates certain social value. The whole set of technology occupies small area; the structure is compact; the investment cost is low; the recovery benefit is great; the invention realizes the environmental protection process of changing the waste which pollutes the environment into the valuable product.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and in particular relates to an organic sludge made from sludge and a preparation process thereof. Background technique [0002] As people pay more and more attention to water resources in modern society, more and more urban sewage treatment plants have been built and put into use in cities and towns across the country, which has played a positive role in the control of water pollution in our country. However, in the process of sewage treatment, activated sludge, which is necessary for treatment, double becomes another source of pollution in the city. Activated sludge has high water content, large volume, easy to rot, and emits foul smell, so the treatment of sludge has become an urgent problem to be solved. At present, the sludge treatment methods are as follows: land use, landfill, incineration, biochemical treatment and dumping into the sea. For landfill, not only need a large enough space an...

AI Technical Summary

Problems solved by technology

For landfill, not only need a large enough space and necessary environmental protection measures, but also need a large amount of transportation costs

In addition, it is difficult to find suitable spaces and places for landfill sludge around the city, and the problem of secondary pollution caused by landfill is becoming increasingly acute

Similarly, incineration of sludge requires a lot of heat energy, so it consumes a lot of fuel, and the investment in incineration equipment is high, and the operating cost is also high. At the same time, a large amount of polluting gas is produced, and a large amount of gas is spent on gas treatment. funds, so the cost of sludge disposal is very expensive

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