Treatment method of heavy metals in sludge

A heavy metal and sewage treatment plant technology, applied in sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of immature technology, high cost, and narrow phytoremediation treatment range.
CN104649528AActive Publication Date: 2015-05-27山东一元绿碳环保科技有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
山东一元绿碳环保科技有限责任公司
Publication Date
2015-05-27

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Abstract

The invention discloses a treatment method of heavy metals in sludge, relates to the technical field of environmental protection and chemical engineering, and in particular relates to the technical field of treatment of sludge heavy metal through filter pressing of urban domestic sewage. The treatment method of the heavy metals in sludge is characterized by comprising the following steps: hydrolyzing proteins in the sludge through a function of a modifying agent; deaminizing amino acid and fixing amino; performing reaction on ammonium chloride generated by fixation and the added calcium hydroxide and glucose powder step by step to reduce sludge heavy metal ion valence or to be directly reduced into elementary substances; reducing heavy metal ions which are not completely reduced under a reduction function of surplus fixed carbon after the heating of the sludge in a subsequent distillation process. The invention discloses a sludge innocent treatment method; resources contained in the sludge are fully utilized, and a practical and feasible new method is provided for sludge treatment.
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Description

technical field

[0001] The invention relates to the technical field of environmental protection and chemical industry, in particular to the technical field of heavy metal treatment in press filter sludge after sewage treatment. Background technique

[0002] In recent years, with the rapid growth of my country's sewage treatment capacity and treatment rate, a large amount of excess sludge has been produced. At present, only a small part of the sludge from urban sewage treatment plants in the country is used for sanitary landfill, land utilization, incineration and building material utilization, etc., and most of them have not undergone standardized treatment and disposal. The heavy metals contained in excess sludge are non-degradable. If they are transported out, simply landfilled or piled up without effective treatment and disposal, they will easily cause persistent pollution to groundwater and soil, directly threatening environmental safety and public health.

[0003] Heav...

Claims

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