Method and device for producing organic fertilizer from organic sludge

Abstract

The invention relates to a method for producing an organic fertilizer from organic sludge, characterized by comprising the following steps of: preparing organic fermentation auxiliary materials in a ratio of 20-50% by weight as well as having a water content of 25-50% and a grain size of 10-20 mm and sludge filter cake prepared materials in a ratio of 50-80% by weight; preparing a microbial inoculum, mixing the microbial inoculum with the organic fermentation auxiliary materials in an auxiliary material bin, conveying the uniformly-mixed fermentation auxiliary material mixture to a convey belt via a conveyer, and conveying the fermentation auxiliary material mixture into a stirring machine via the convey belt; conveying the crushed sludge to the convey belt via a sludge feeding machine, and conveying the sludge filter cake into the stirring machine via the convey belt; and adequately mixing the fermentation auxiliary material mixture with the sludge filter cake via the stirring machine, and conveying the mixed to-be-fermented mixture into a fermentation box and fermenting for 6-10 days at a normal temperature. The invention further provides a device for producing an organic fertilizer from organic sludge. The method and the device disclosed by the invention recycle the sludge filter cake of each sewage treatment plant, as well as are green and environment-friendly.

Description

technical field [0001] The invention relates to a method and a device for making organic fertilizer from organic sludge. Background technique [0002] Sludge filter cake is a by-product output of sludge treatment plants. Generally, the treatment process of sewage treatment plants is the inlet of the main sewage pipe→grid→grit chamber→sludge concentration→sludge dewatering (use plate and frame filter press or belt type filter press) → sludge filter cake, each sewage treatment plant produces a large amount of sludge filter cake with a water content of about 85% every day, and this part of the filter cake contains a large amount of organic matter that has not been decomposed , trace heavy metals, various fungi, and a certain amount of beneficial elements such as nitrogen, phosphorus, and potassium. If they are discharged arbitrarily, part of the organic matter will produce odor during the process of oxidation and decomposition, which will cause secondary pollution to the enviro...

AI Technical Summary

Problems solved by technology

[0002] Sludge filter cake is a by-product output of sludge treatment plants. Generally, the treatment process of sewage treatment plants is the inlet of the main sewage pipe→grid→grit chamber→sludge concentration→sludge dewatering (use plate and frame filter press or belt type filter press) → sludge filter cake, each sewage treatment plant produces a large amount of sludge filter cake with a water content of about 85% every day, and this part of the filter cake contains a large amount of organic matter that has not been decomposed , trace heavy metals, various fungi, and a certain amount of beneficial elements such as nitrogen, phosphorus, and potassium. If they are discharged arbitrarily, some organic matter will produce odor during the process of oxidation and decomposition, which will cause secondary pollution to the environment and pollute the atmosphere and soil. and the surrounding environment, and occupy limited valuable land resources, becoming a burden on sewage treatment plants

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