Odorless sludge advanced treatment method and system thereof

Abstract

The invention discloses an odorless sludge advanced treatment method and system thereof, belonging to the field of environment-friendly technology for sludge treatment. The method comprises the following steps: a) adding a heavy metal trapping agent into sludge and performing electroosmosis; b) sub-packaging the sludge and putting onto filter cloth, and spraying lumbrokinase bacteria liquid onto the sludge so as to wrap the sludge to obtain a sludge bag; c) performing mechanical extrusion and dehydration of the sludge bag to reduce the water content of the sludge to 30-50%; and d) adding the ground agricultural waste into the sludge and mixing uniformly; and adding a building curing agent and pressing to obtain a sludge disc. The treatment system comprises a sludge heavy metal removal unit, a sludge enzyme catalysis unit, a high-pressure dehydration unit and a curing forming unit communicated in sequence. The treatment method has the advantages of high efficiency, low cost, no odor in the treatment process and excellent reduction effect, and lays a firm foundation for the resource utilization of sludge; and the treatment system has the advantages of simple and compact structure and stable and reliable operation, and can realize circular utilization of resources to reduce harm to the environment.

Description

technical field [0001] The invention relates to the technical field of sludge treatment and environmental protection, in particular to an odorless sludge advanced treatment method and a system thereof. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of sewage treatment efficiency, the by-product of sewage treatment - sludge has increased dramatically. More than 30 million tons of sludge are produced in the country every year. The sources of sludge include domestic sewage and industrial wastewater. The water content in sludge can reach 95%, which is difficult to meet the requirements of subsequent treatment such as composting, landfill, pyrolysis, and incineration. , and increased transportation costs and difficulties. In addition, sludge contains many harmful substances, such as refractory organic matter, heavy metal elements, pathogenic microorganisms, insect eggs, weed seeds, etc. If not properly disposed of,...

AI Technical Summary

Problems solved by technology

More than 30 million tons of sludge are produced in the country every year. The sources of sludge include domestic sewage and industrial wastewater. The water content in sludge can reach 95%, which is difficult to meet the requirements of subsequent treatment such as composting, landfill, pyrolysis, and incineration. , and increased transportation costs and difficulties

In addition, sludge contains many harmful substances, such as refractory organic matter, heavy metal elements, pathogenic microorganisms, insect eggs, weed seeds, etc. If not properly disposed of, it will not only cause a waste of energy, but also cause social and human dependence. To cause great harm to the natural environment for survival

Therefore, the treatment and disposal of sludge has become an important part of environmental protection and urban environmental sanitation. Since sludge contains high moisture that is difficult to remove, it makes subsequent treatment and disposal difficult, and contains a large amount of organic matter.

At present, the existing sludge treatment technology is relatively immature, and the treatment cost is relatively high, and the treatment effect is not ideal

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