Sludge-carbon organic fertilizer producing technology

Abstract

The invention relates to a sludge-carbon organic fertilizer producing technology. According to the technology, on the basis of a sludge deep dehydration technology and a sludge carbonization technology, sludge is dehydrated and reduced to be changed into dehydrated sludge (the dehydrated sludge is divided into wet sludge and dehydrated sludge cakes), the dehydrated sludge is divided into two parts, one part of the dehydrated sludge is carbonized to prepare sludge carbon, and then the sludge carbon and the other part of the dehydrated sludge are stirred and mixed to prepare a sludge-carbon organic fertilizer.

Description

technical field [0001] The invention relates to the technical field of making fertilizer from sludge, in particular to a production process of sludge charcoal organic fertilizer. Background technique [0002] There are many types of sludge, including excess sludge with a water content of more than 99% from the sewage treatment system, mechanical dehydration of the excess sludge to produce wet sludge with a water content of about 80%, and filter dehydration of the high-pressure plate and frame machine. The moisture content of the dehydrated cake is about 60%. The sludge contains a lot of organic matter, including nitrogen, phosphorus, potassium, etc., which are beneficial to plant growth. The traditional process of making fertilizer from sludge is realized through the composting process, adding auxiliary materials to the sludge and composting together. Fertilizer-making process cycle field needs to occupy a large amount of space and produce odor, etc. After adding auxiliary m...

AI Technical Summary

Problems solved by technology

[0002] There are many types of sludge, including excess sludge with a water content of more than 99% from the sewage treatment system, mechanical dehydration of the excess sludge to produce wet sludge with a water content of about 80%, and filter dehydration of the high-pressure plate and frame machine. The moisture content of the dehydrated cake is about 60%. The sludge contains a lot of organic matter, including nitrogen, phosphorus, potassium, etc., which are beneficial to plant growth. The traditional process of making fertilizer from sludge is realized through the composting process, adding auxiliary materials to the sludge and composting together. Fertilizer-making process cycle field needs to occupy a large amount of space and produce odor, etc. After adding auxiliary materials, the weight of fertilizer produced is greater than the original sludge amount. If the product sales are not smooth and the product backlog is caused, it is easy to cause sludge fertilizer to be unsustainable normal operation

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