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Sewage purification treatment process

A treatment process and sewage purification technology, applied in water/sewage treatment, multi-stage water/sewage treatment, biological water/sewage treatment, etc., can solve incomplete sewage purification, incomplete removal of phosphorus and nitrogen, and difficult removal of oil stains, etc. problems, to achieve the effect of improving the quality of sewage treatment, the treatment process is easy to operate, and reducing the cost of sewage treatment

Inactive Publication Date: 2022-05-27
苏州诚天下环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the traditional sewage treatment process, the phosphorus and nitrogen in the sewage are not completely removed, which cannot meet the demand for phosphorus and nitrogen in the subsequent biological growth, and the oil in the sewage is not easy to remove, resulting in incomplete purification of the sewage, which cannot meet the needs of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A sewage purification and treatment process, including the following steps: (1) Sewage collection: centralized classification of sewage and storage in a collection tank; (2) Sewage sedimentation: inorganic particles, suspended solids and insoluble impurities in sewage (3) Filtration: filter the sedimented sewage to remove inorganic particles, suspended solids and insoluble impurities; (4) Air flotation and impurity removal: inject air into the sewage treatment tank through an air pump to make air bubbles adhere to the remaining impurities (5) Oil separation: remove floating oil and loose oil in the sewage; (6) Adjust the pH of the sewage: add chemicals to the sewage to make the pH of the sewage between 7.2; (7) Dephosphorization of sewage: remove phosphorus in sewage; (8) Set aside and filter again, and adjust the pH value of the final treated sewage to 6.8.

[0020] In the solution of the present invention, in the step (4), the air flotation removing impu...

Embodiment 2

[0029] Embodiment 2: Based on the above embodiment, a sewage purification treatment process includes the following steps: (1) Sewage collection: centralized classification of sewage and storage in a collection tank; (2) Sewage sedimentation: suspending inorganic particles and solids in sewage (3) Filtration: filter the sedimented sewage to remove inorganic particles, suspended solids and insoluble impurities; (4) Air flotation and impurity removal: inject air into the sewage treatment tank through an air pump to make the air The air bubbles adhere to the surface of the remaining impurities, causing the impurities to be suspended on the surface of the sewage, and then salvaged; (5) Oil separation: remove the floating oil and loose oil in the sewage; (6) Adjust the pH of the sewage: add chemicals to the sewage to make the pH value of the sewage between 8; (7) Sewage dephosphorization: remove phosphorus in sewage; (8) Set aside and filter again, and adjust the pH value of the fina...

Embodiment 3

[0035] Embodiment 3: Based on the above-mentioned Embodiment 1, wherein step (7) also includes denitrification of sewage, and the treatment process of denitrification of sewage is: precipitation and impurity removal—adding chemicals in anaerobic tank—hydrolysis and denitrification—aerobic tank The sewage is transported to the secondary sedimentation tank and chemical reagents are added to separate the activated sludge - the pH value of the sewage after denitrification is 6.8.

[0036] In the denitrifying flora under anoxic conditions, NOx - It is an electron acceptor, organic matter is an electron complex, NO 3- -N→NO 2- -N→N 2 ;

[0037] In autotrophic nitrifying bacteria under aerobic conditions, NH 4+ -N→NO 2- -N→NO 2- -N.

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PUM

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Abstract

The invention discloses a sewage purification treatment process. The sewage purification treatment process comprises the following steps: (1) sewage collection; (2) sewage precipitation: standing inorganic particles, suspended solids and insoluble impurities in the sewage; (3) filtering; (4) air flotation impurity removal; (5) separating oil; (6) adjusting the pH value of the sewage: adding an agent into the sewage to enable the pH value of the sewage to be 7.2-8; (7) dephosphorizing the sewage: removing phosphorus in the sewage; (8) standing again and filtering; an anode and a cathode of the microbial electro-Fenton system react, so that refractory substances in the wastewater are treated, and pathogenic microorganisms are inactivated; according to the sewage purification treatment process, sewage is effectively purified, phosphorus and nitrogen elements in the sewage can be removed in the process, so that the requirement of subsequent biological breeding and growth on phosphorus is met, floating oil in the sewage can be removed, the sewage treatment performance is further improved, and the use requirement of sewage purification is met.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage purification treatment process. Background technique [0002] Sewage refers to the general term for water discharged from production and living activities. Water that has lost its original function is referred to as sewage. Sewage is due to the incorporation of new substances into the water or changes in external conditions, resulting in the deterioration of water and the inability to continue to maintain the original function. [0003] The eutrophication of water body is closely related to the content of P and N in water body. However, due to the continuous use of agricultural fertilizers and the discharge of urban domestic sewage and industrial sewage, the level of P in the water environment continues to rise. In the composition of urban domestic sewage, the content of P is generally about 12 mg / L, and the soluble P accounts for about 70%. [0004] However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/10
CPCC02F9/00C02F1/001C02F2001/007C02F1/24C02F1/40C02F1/66C02F1/725C02F2305/026C02F1/52C02F2101/105C02F3/00Y02W10/10
Inventor 张冬梅
Owner 苏州诚天下环保科技有限公司