Sludge controlled-release greening system for urban sewage treatment plant

By planting heavy metal hyperaccumulator plants on the sludge surface and using spray components and mixing boxes, the problem of non-degradable heavy metals in sludge was solved, and the safe resource utilization of sludge and the control of soil heavy metal pollution were achieved.

CN120717829APending Publication Date: 2025-09-30SHANDONG MINTONG ENVIRONMENTAL SAFETY TECH
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Patent Information

Application Number
CN202411982916.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-09-30

AI Technical Summary

Technical Problem

Heavy metal elements in sludge cannot be degraded by microorganisms, and there are risks in applying them directly to farmland. Existing composting and fermentation methods cannot completely remove heavy metals, leading to the risk of soil pollution.

Method used

A controlled-release greening system for sludge from urban sewage treatment plants is used. Heavy metal hyperaccumulators are planted on the sludge surface, combined with spray components and mixing boxes to extract, fix, and evaporate heavy metals from the sludge. Plant growth is ensured by root fixation and nutrient solution dripping, and the aboveground parts are harvested to reduce the heavy metal content in the soil.

Benefits of technology

Effectively remove heavy metals from sludge, ensure the growth of green plants, reduce the content of heavy metals in the soil, and realize the safe resource utilization of sludge.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of environmental protection equipment, and particularly discloses a municipal sewage treatment plant sludge controlled-release greening system which comprises a compost box, a fixing plate fixedly mounted on one side of the top of the compost box, a fixing part fixedly mounted on the outer side of the compost box, a moving assembly arranged at the bottom of the fixing part, and a sealing plate fixedly connected to the top of the compost box. The top of the compost box is semi-open, sludge is placed in the compost box, and a plurality of groups of green plants are inserted into the top of the sludge; a mixing box is fixedly installed at the top of the sealing plate, a spraying assembly is arranged at the end of the mixing box, and the end of the spraying assembly is fixed to the side wall of the fixing plate. Sludge is put into a composting box, green plants are planted at the top of the sludge, the green plants are heavy metal hyperaccumulator plants, pollutants in the environment are removed through the green plants, and heavy metal in soil is extracted, fixed and evaporated through heavy metal resistant plants, so that the purpose of treating heavy metal pollution of the soil is achieved.
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