Treatment method of organophosphorus-containing wastewater

A treatment method, organic phosphorus technology, applied in the direction of water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of weak ozone oxidation ability and little effect of organic phosphorus, and achieve Efficient control, easy operation and cost reduction

Pending Publication Date: 2021-02-23
东莞市美淼环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, advanced oxidation methods have been proposed for wastewater treatment. The advanced oxidation methods mainly include the Fenton process and the electro-oxidation of ozone. Among them, the Fenton process needs to add a large amount of ferrous sulfate and hydrogen peroxide, and the process produces a large amount of solid waste. The ozone Oxidation ability is too weak, generally only 20mg / L of COD can be used, which has little effect on organic phosphorus; in view of the above problems, it is necessary to improve the existing treatment method of organic phosphorus wastewater so that it can meet the requirements of organic phosphorus in wastewater. processing needs

Method used

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  • Treatment method of organophosphorus-containing wastewater

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Effect test

Embodiment 1

[0020] Embodiment 1. The organophosphorus wastewater of 100mg / l is processed, and the process is as follows:

[0021] Step 1. Use BDD electrodes and graphene electrodes to pretreat wastewater. The current density of graphene electrodes is 300A / square meter, the current density of BDD electrodes is 500A / square meter, and the number of BDD electrodes is 5%. During the pretreatment process Reduce the COD in the sewage, decompose the refractory organic matter into small molecule organic matter, and convert organic phosphorus into inorganic phosphorus at the same time, and carry out pretreatment to facilitate subsequent flocculation treatment;

[0022] Step 2: Adding polyferron as a flocculant into a flocculation tank to flocculate the pretreated wastewater to obtain iron phosphate and phosphorous-containing discharge wastewater up to standard, wherein the molar amount of polyferric is not less than that of organic phosphorus.

Embodiment 2

[0023] Embodiment 2. The organophosphorus wastewater of 100mg / l is processed, and the process is as follows:

[0024] Step 1. Use BDD electrodes and graphene electrodes to pretreat wastewater. The current density of graphene electrodes is 600A / square meter, the current density of BDD electrodes is 800A / square meter, and the number of BDD electrodes is 7%. During the pretreatment process Reduce the COD in the sewage, decompose the refractory organic matter into small molecule organic matter, and convert organic phosphorus into inorganic phosphorus at the same time, and carry out pretreatment to facilitate subsequent flocculation treatment;

[0025] Step 2: Adding polyferron as a flocculant into a flocculation tank to flocculate the pretreated wastewater to obtain iron phosphate and phosphorous-containing discharge wastewater up to standard, wherein the molar amount of polyferric is not less than that of organic phosphorus.

Embodiment 3

[0026] Embodiment 3. The organophosphorus wastewater of 100mg / l is processed, and the process is as follows:

[0027] Step 1. Use BDD electrodes and graphene electrodes to pretreat wastewater. The current density of graphene electrodes is 1000A / square meter, the current density of BDD electrodes is 1000A / square meter, and the number of BDD electrodes is 10%. During the pretreatment process Reduce the COD in the sewage, decompose the refractory organic matter into small molecule organic matter, and convert organic phosphorus into inorganic phosphorus at the same time, and carry out pretreatment to facilitate subsequent flocculation treatment;

[0028] Step 2: Adding polyferron as a flocculant into a flocculation tank to flocculate the pretreated wastewater to obtain iron phosphate and phosphorous-containing discharge wastewater up to standard, wherein the molar amount of polyferric is not less than that of organic phosphorus.

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Abstract

The invention discloses a method for treating organophosphorus-containing wastewater. The method comprises the following steps: step 1, pretreating wastewater by adopting an electrode; and 2, adding polymeric ferric as a flocculating agent into a flocculation tank to carry out flocculation treatment on the pretreated wastewater to obtain iron phosphate and phosphorus-containing up-to-standard discharge wastewater. The method has the beneficial effects that a BDD electrode or graphene electrode is used for pretreatment, so that COD in the sewage is reduced, organic matter which is difficult tobiodegrade is decomposed into small molecular organic matter, and meanwhile, organic phosphorus is converted into inorganic phosphorus for subsequent flocculation treatment; and by controlling the number of the BDD electrodes, the cost is reduced, organophosphorus is effectively degraded through a coupling system of the BDD electrode and the graphene electrode. The method is easy to operate, efficient control over the organophosphorus content in the wastewater is achieved, it is guaranteed that the treated wastewater can be discharged up to the standard according to the high standard, and theeutrophication risk of the water body is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment method for organic phosphorus-containing wastewater. Background technique [0002] With the rapid development of economy and society and the gradual improvement of people's quality of life, the discharge of industrial wastewater and domestic wastewater is increasing day by day. Water pollution seriously endangers the health and life of people and animals, and seriously threatens human production, life and ecology. Among them, phosphorus is one of the important pollution elements of water eutrophication. The main harm of organic phosphorus to human body is that it will combine with acetylcholinesterase in the body, so that acetylcholine cannot be hydrolyzed, resulting in blurred vision, headache, dizziness and fatigue Wait; [0003] At present, there are mainly two treatment methods for wastewater containing organic phosphorus, which are: 1. The boiling p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/30
CPCC02F1/5236C02F1/46109C02F2001/46133C02F2101/30
Inventor 左卫雄左有兴李春明
Owner 东莞市美淼环保科技有限公司
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