Technology for pretreating degradation-resistant sewage by coupling iron carbon and hydrolyzed granular sludge

A technology of granular sludge and pretreatment, applied in water/sludge/sewage treatment, biological water/sewage treatment, special compound water treatment, etc. It can solve the problem of large iron dissolution and achieve the effect of promoting the formation

Inactive Publication Date: 2020-06-09
ZHEJIANG UNIV OF TECH
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  • Technology for pretreating degradation-resistant sewage by coupling iron carbon and hydrolyzed granular sludge

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Embodiment 1

[0028] A technology that uses iron-carbon and hydrolyzed granular sludge coupling to treat refractory wastewater. Two sets of sequencing batch hydrolysis reactors with the same operating conditions are set up, and the effective volume is 3L. Add a fixed layer at the middle and lower part of the water level of one of the hydrolysis tanks, add 400g of iron carbon on the fixed layer, choose the refractory wastewater as aquaculture wastewater, COD is about 700mg / L, B / C is about 0.2, NH 4 + -N concentration is about 450mg / L, TP is about 15mg / L; during the operation of the system, the pretreatment effect of the iron-carbon filler group is significantly better than that of the non-addition iron-carbon group, and the B / C average of the iron-carbon filler group is increased to 0.30, while the group without adding iron-carbon filler only increased to 0.25; and the group adding iron-carbon filler had a certain phosphorus removal effect, which could remove 2.2mg / L phosphorus on average; t...

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Abstract

The invention discloses a technology for pretreating degradation-resistant sewage by coupling iron-carbon and hydrolyzed granular sludge, which adopts an iron-carbon and hydrolyzed granular sludge coupling pretreatment technology and comprises the following specific operation steps: adding a fixed layer in a hydrolysis tank, adding a certain amount of iron-carbon into the fixed layer, and arranging a sequencing batch reactor in the hydrolysis tank for operation. The iron-carbon micro-electrolysis process is coupled with the hydrolyzed granular sludge, so that the granulation of the hydrolyzedsludge is promoted, the pH in the hydrolysis reactor is stabilized, the biodegradability of the degradation-resistant wastewater is effectively improved, and the physical, chemical and biological synergistic pretreatment of the degradation-resistant wastewater is realized.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a process for pretreating refractory sewage by coupling iron-carbon and hydrolyzed granular sludge. Background technique [0002] In order to achieve effective treatment of refractory wastewater, some pretreatment technologies are usually used to reduce the toxicity of toxic wastewater, improve the biodegradability of wastewater, create conditions for biochemical treatment and finally achieve the discharge of wastewater up to standard. Among many pretreatment technologies, iron-carbon micro-electrolysis technology has been widely used in the pretreatment of industrial wastewater. It has the advantages of simple operation, economic feasibility and reusability, and also has a certain phosphorus removal effect. In the iron-carbon micro-electrolysis reactor, when the wastewater (electrolyte solution) is in contact with the iron-carbon filler, many macroscopic...

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Application Information

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IPC IPC(8): C02F3/28C02F3/00C02F101/30
CPCC02F3/005C02F3/282C02F2101/30C02F2305/06
Inventor 李军刘璐文郭焘
Owner ZHEJIANG UNIV OF TECH
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