Catalytic internal electrolysis filler and preparation method thereof, catalytic internal electrolysis reaction device, and deep sewage purification system

A reaction device and internal electrolysis technology, applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as poor removal of total nitrogen, restore catalytic reduction performance, and improve reliability Biochemical property, effect of improving sewage purification ability

Active Publication Date: 2020-07-31
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the residual organic matter in the tail water is mainly a carbon source that is difficult to be used by organisms for denitrification, the removal effect of wetlands on total nitrogen is not good.

Method used

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  • Catalytic internal electrolysis filler and preparation method thereof, catalytic internal electrolysis reaction device, and deep sewage purification system
  • Catalytic internal electrolysis filler and preparation method thereof, catalytic internal electrolysis reaction device, and deep sewage purification system
  • Catalytic internal electrolysis filler and preparation method thereof, catalytic internal electrolysis reaction device, and deep sewage purification system

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preparation example Construction

[0033] In the present invention, the copper-plated iron powder is preferably prepared by the following steps:

[0034] An aqueous solution comprising a copper source, a pH control agent and a corrosion inhibitor is used as a plating solution, and the iron powder is copper-plated to obtain copper-plated iron powder; the copper source is copper sulfate pentahydrate, and the pH control agent is sulfuric acid or nitric acid, The corrosion inhibitor is propenylthiourea.

[0035]In the present invention, the pH value of the plating solution is preferably 1-2. In the present invention, the mass concentration of the copper source in the plating solution is preferably 5-10%; the concentration of the corrosion inhibitor is preferably 0.50±0.01 g / L. The present invention does not specifically limit the concentration and addition amount of the pH control agent in the plating solution, as long as the pH value of the plating solution is 1-2.

[0036] In the present invention, the particle...

Embodiment 1

[0074] The experiment site is a sewage treatment plant in Minhang, Shanghai. A set of advanced sewage purification system (including catalytic internal electrolysis reaction device and subsurface flow wetland) was built in the plant area to treat the tail water after the secondary sedimentation tank. The treated water volume is 100m 3 / d.

[0075] The water quality of the tail water was determined to be 6-11 mg / L of nitrate, 1-4 mg / L of ammonia nitrogen, 9-15 mg / L of total nitrogen, 0.3-0.5 mg / L of total phosphorus and 22-45 mg / L of COD .

[0076] Wherein, the planar size of the reaction tank of the catalytic internal electrolysis reaction device is 5 × 5m, and the height is 2.0m (wherein 0.5m is the height of the backwash gas distribution area; 1.0m is the height of the inner electrolysis filler frame, i.e. the height of the reaction zone ; 0.5m is the super height of the upper part), 15 frames equipped with catalytic inner electrolytic fillers are placed in the reaction zon...

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Abstract

The invention provides a catalytic internal electrolysis packing, a preparation method thereof, a catalytic internal electrolysis reaction device and a sewage deep purification system, and belongs tothe field of sewage treatment. A plurality of Fe-Cu-C primary batteries are contained inside the packing, chain breakage of macromolecular organic matters difficult to degrade inside sewage can be realized in virtue of electron gain and loss in the reaction of primary batteries, and the biological utilization rate is improved. The catalytic internal electrolysis reaction device containing the packing is combined with a subsurface wetland, and micromolecules generated after chain breakage of macromolecular organic matters difficult to degrade inside sewage can further reduce the total nitrogencontent and COD content inside the sewage under the combined effect of microorganisms and wetland plants attached to cobble stone inside the subsurface wetland. The embodiment shows that, three monthlater through purification system treatment of tail water after secondary sedimentation tank treatment of a sewage treatment plant in Minhang of Shanghai, the total nitrogen content of water is 1.8 to4.2 mg / L, the total phosphorus content is 0.08 to 0.15 mg / L, and the COD content is 12 to 18 mg / L.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a catalytic internal electrolytic filler and a preparation method thereof, a catalytic internal electrolytic reaction device, and a sewage deep purification system. Background technique [0002] my country's water resources are tense, and the eutrophication of water bodies is serious. Sewage collection, treatment and discharge are effective ways to reduce nitrogen and phosphorus nutrients and improve the ecological environment of receiving water bodies. However, although the tail water discharged by most urban sewage treatment plants in my country can meet the first-level B or first-level A standard in the "Pollutant Discharge Standards for Urban Wastewater Treatment Plants" (18918-2002), the total nitrogen content of the tail water is still high. It is far higher than the limit value of surface water V, which poses a huge threat to the water quality of receiving water bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/461C02F101/16
CPCC02F1/46104C02F3/32C02F2001/46142C02F2101/16C02F2101/163C02F2201/4619
Inventor 何圣兵马玉慧孙珊珊顾序舜覃思王亚楠袁文璟陈帆帆
Owner SHANGHAI JIAO TONG UNIV
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