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Combined treatment process for organophosphorus wastewater with high total phosphorus concentration

A treatment process, organic phosphorus technology, applied in the direction of water/sewage treatment, special compound water treatment, light water/sewage treatment, etc., can solve the problems of complex components, failure to achieve treatment effect, poor biodegradability, etc., to improve absorption Efficiency, improvement of mineralization removal rate, and strong adsorption capacity

Inactive Publication Date: 2020-11-03
东阳市前途工业设计有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned inventions and prior art methods commonly used in the treatment of phosphorus in wastewater at home and abroad mainly include traditional chemical methods, biological methods, chemical-assisted biological methods, and adsorption methods and electrolytic methods developed in recent years; in organic phosphorus corrosion inhibition The wastewater produced during the production of chemical agents contains a large amount of organophosphorus compounds, such as aminotrimethylenephosphonic acid (ATMP), hydroxyethylenediphosphonic acid (HEDP), 2-phosphonobutane-1,2, 4-tricarboxylic acid (PBTC), polyoxyethylene ether glycerol phosphate, etc.; this kind of wastewater has the problems of poor biodegradability, complex composition, and high concentration of total phosphorus. The above methods often fail to achieve good treatment effects

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  • Combined treatment process for organophosphorus wastewater with high total phosphorus concentration
  • Combined treatment process for organophosphorus wastewater with high total phosphorus concentration

Examples

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Effect test

Embodiment 1

[0033] A combined treatment process for organophosphorus wastewater with a high total phosphorus concentration, the specific preparation scheme of which is as follows:

[0034] Pretreatment, the organophosphorus wastewater is filtered through a filter membrane to remove solid impurities, colloidal particles and suspended particles, and then enters the regulating tank for 5 minutes of homogenization;

[0035] First-level chemical phosphorus removal process, the organic phosphorus wastewater after homogenization is pumped into the phosphorus removal pool, the phosphorus removal pool is a chemical phosphorus removal pool, firstly add lime to the pool, adjust the pH value to 10, then let it stand for 10 hours, then Add magnesium chloride in the pond, and the described lime addition is 800g / m 3 , the amount of magnesium chloride added is 200g / m 3 ; Precipitation after completion, supernatant overflow;

[0036] Flocculant dephosphorization process, adding flocculant to the wastewa...

Embodiment 2

[0049] A combined treatment process for organophosphorus wastewater with a high total phosphorus concentration, the specific preparation scheme of which is as follows:

[0050] Pretreatment, the organophosphorus wastewater is filtered through a filter membrane to remove solid impurities, colloidal particles and suspended particles, and then enters the regulating tank for 8 minutes of homogenization;

[0051] First-level chemical phosphorus removal process, the homogenized organic phosphorus wastewater is pumped into the phosphorus removal pool, the phosphorus removal pool is a chemical phosphorus removal pool, first add lime to the pool, adjust the pH value to 11, then let it stand for 13 hours, then Add magnesium chloride in the pool, the lime addition is 1000g / m 3 , the amount of magnesium chloride added is 350g / m 3 ; Precipitation after completion, supernatant overflow;

[0052] Flocculation and phosphorus removal process, adding flocculant to the wastewater clear liquid ...

Embodiment 3

[0065] A combined treatment process for organophosphorus wastewater with a high total phosphorus concentration, the specific preparation scheme of which is as follows:

[0066] Pretreatment, the organophosphorus wastewater is filtered through a filter membrane to remove solid impurities, colloidal particles and suspended particles, and then enters the regulating tank for 10 minutes of homogenization;

[0067] First-level chemical phosphorus removal process, the homogenized organic phosphorus wastewater is pumped into the phosphorus removal pool, the phosphorus removal pool is a chemical phosphorus removal pool, first add lime to the pool, adjust the pH value to 13, then let it stand for 15 hours, and then Add magnesium chloride in the pond, and the described lime addition is 1500g / m 3 , the amount of magnesium chloride added is 500g / m 3 ; Precipitation after completion, supernatant overflow;

[0068] Flocculation and phosphorus removal process, adding flocculant to the waste...

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Abstract

The invention relates to the field of environmental protection, in particular to a combined treatment process for organophosphorus wastewater with high total phosphorus concentration. The method comprises the steps of: pretreatment, a first-stage chemical phosphorus removal process, a flocculation phosphorus removal process, an oxidation phosphorus removal process and a second-stage chemical phosphorus removal process. Firstly, under the alkaline condition, organic phosphorus is preliminarily converted into inorganic phosphorus salt, then magnesium salt is added, a precipitation reaction is carried out to remove part of phosphorus, and then the remaining organic phosphorus pollutants can be degraded and removed through a Fenton photocatalysis combined oxidation process. By adopting the process of Fenton treatment and photocatalytic oxidation in sequence, the chromaticity of the wastewater can be reduced by utilizing Fenton treatment, the light absorption efficiency of the catalyst in the subsequent photocatalytic process can be effectively improved, and a large number of active free radicals such as superoxide anions or hydroxyl free radicals generated by residual hydrogen peroxidein the Fenton oxidation process are fully utilized; therefore, the mineralization removal rate of photocatalytic treatment of organic wastewater is further improved.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a combined treatment process for organic phosphorus wastewater with high total phosphorus concentration. Background technique [0002] There are more than 10,000 organophosphorus compounds produced in the world. Due to the expanded production and widespread use of organophosphorus chemicals, a large amount of high-concentration toxic organic wastewater generated during the production process will cause serious damage to water bodies and the ecological environment if they are discharged directly. pollute. [0003] CN202193674U relates to waste water treatment equipment, in particular to waste water treatment equipment containing organic phosphorus. Disclosed is an organophosphorus wastewater treatment device, comprising a conditioning tank connected to a catalytic oxidation tank, the catalytic oxidation tank connected to a neutralization aeration tank, the neutralization a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08B01J31/02C02F101/30
CPCB01J31/0254C02F1/30C02F1/44C02F1/4672C02F1/5236C02F1/56C02F1/58C02F1/66C02F1/722C02F1/725C02F9/00C02F2101/30C02F2305/026C02F2305/10
Inventor 蔡兰花王芳李培则
Owner 东阳市前途工业设计有限公司
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