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Method of preparing sludge-based Fe-Zn three-dimensional particle catalyst by residual sludge

A technology of excess sludge and catalyst, applied in the field of solid waste resource utilization and sewage treatment, can solve the problems of large randomness of metal types and quantities, limited number of active components, unstable catalytic activity, etc., and achieve good environmental benefits and Economic benefits, easy operation and high strength

Active Publication Date: 2018-11-02
EAST CHINA NORMAL UNIV
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Problems solved by technology

Patent CN106311202A uses the inherent metal elements in the sludge as the active components of the catalyst, but the type and quantity of metals are relatively random, so the number of active components is limited and the catalytic activity is unstable

Method used

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  • Method of preparing sludge-based Fe-Zn three-dimensional particle catalyst by residual sludge
  • Method of preparing sludge-based Fe-Zn three-dimensional particle catalyst by residual sludge
  • Method of preparing sludge-based Fe-Zn three-dimensional particle catalyst by residual sludge

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Embodiment

[0032] Take the dewatered sludge from the sewage treatment plant that has been conditioned by polyferron, dry it at 110°C for 24 hours, grind it with a pulverizer and pass it through a 150-mesh sieve to obtain a dry sludge powder; add 1% carboxymethyl to the sludge powder Cellulose sodium, and fully mixed evenly; activate with zinc chloride solution with a mass concentration of 5mol / L as the activator, the dosage is 40% by mass fraction, and the sludge base and the activator are uniformly mixed and then made by a granulator Solid balls with a diameter of 8mm were dried at 110°C; the sludge balls were placed in a carbonization furnace with nitrogen as a protective gas, heated to 600°C at a heating rate of 15°C / min, and pyrolyzed for 120 minutes After cooling to room temperature; soak the sludge charcoal spheres after the carbonization step in 90°C water until the pH of the effluent is 7; dry the sludge charcoal spheres after the cleaning step at 110°C to obtain the sludge-based ...

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Abstract

The invention discloses a method of preparing a sludge-based Fe-Zn three-dimensional particle catalyst by residual sludge. The sludge-based Fe-Zn three-dimensional particle catalyst is prepared, by taking residual sludge of a sewage treatment plant caused by flocculation adjustment of polyferric sulfate as material, by the steps of drying, crushing, screening, forming, activating, granulating, carbonizing, cleaning and drying the dehydrated residual sludge. The prepared catalyst fills an effective space between positive and negative electrodes of a three-dimensional electrode reactor for catalyzing electrocatalytic oxidation of the sewage. By taking sludge carbon as a framework, the Fe-Zn structure sludge-based catalyst is prepared by means of ferrum in a polyferric flocculant and zinc inan activator zinc chloride. The preparation process is simple in flow and easy to operate. By following a principle of sustainable development, waste is turned into wealth, pollutants are catalytically degraded efficiently, double purposes of resource utilization of the sludge and efficient removal of degradation-resistant waste water are achieved, and the method has good environmental benefit andeconomical benefit.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource utilization and sewage treatment. The invention relates to a method for preparing a sludge-based Fe-Zn three-dimensional particle catalyst by using excess sludge. Background technique [0002] Sewage treatment sludge is a kind of waste with huge environmental pollution hazards, and its reasonable and scientific treatment and disposal has always been a major issue in the environmental field. At present, the four main methods of sludge treatment in my country, landfill, composting, natural drying and incineration account for roughly 65%, 15%, 6% and 3% respectively. Sanitary landfill consumes land resources and easily pollutes the ecological environment; composting can realize the resource utilization of sludge, but heavy metals in sludge become a bottleneck restricting resource utilization; incineration and drying consume too much energy, and incineration is easy to cause air pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J35/02B01J37/08C02F1/461C02F1/72C02F101/34B01J35/00
CPCC02F1/4672B01J23/80B01J37/084C02F2101/345B01J35/50B01J35/33
Inventor 徐娟李秀艳吉静
Owner EAST CHINA NORMAL UNIV
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