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Processing system and operation method for phosphor-containing organic wastewater

A technology of organic wastewater and operation method, which is applied in water/sewage treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of not being able to guarantee discharge up to the standard, and reduce operating costs and dosage. Effect

Inactive Publication Date: 2009-05-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing aerobic biological treatment measures or chemical phosphorus removal measures alone cannot guarantee that the organic matter and phosphorus in the phosphorus-containing organic wastewater discharged from the anaerobic system can meet the discharge standards at the same time.

Method used

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  • Processing system and operation method for phosphor-containing organic wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The water quality of phosphorus-containing organic wastewater 1 COD≥500mg / L, BOD 5 ≥300mg / L, TP≥18mg / L, it enters the mixing reactor 3 (hydraulic retention time 20min), and the FeCl 3(dosing amount 90mg / L) iron salt 2, the mud slag that returns from sludge tank 9 fully mixes, and the phosphorus in the waste water and iron salt generation chemical reaction generates the insoluble sediment of phosphorus, and precipitation is poisonous to aerobic microorganism simultaneously sulfide. Then, the wastewater and sediment discharged from the mixing reactor 3 are mixed with the excess sludge returned from the excess sludge conditioning tank 8, and flow into the sedimentation tank 4 (hydraulic retention time 2.0h) together for sludge-water separation.

[0029] The waste water after chemical phosphorus removal from the sedimentation tank 4 enters the contact oxidation tank 5 (hydraulic retention time 4.5h), where a part of the organic matter is oxidized and degraded into carbon d...

Embodiment 2

[0033] The water quality of phosphorus-containing organic wastewater 1 COD≥2500mg / L, BOD 5 ≥1350mg / L, TP≥33mg / L, it enters the mixing reactor 3 (hydraulic retention time 30min), and the FeCl 3 (dosing amount 180mg / L) iron salt 2, the mud slag that returns from sludge tank 9 fully mixes, and the phosphorus in the waste water and iron salt generation chemical reaction generates the insoluble sediment of phosphorus, and precipitation is poisonous to aerobic microorganism at the same time sulfide. Then, the wastewater and sediment discharged from the mixing reactor 3 are mixed with the excess sludge returned from the excess sludge conditioning tank 8, and flow into the sedimentation tank 4 (hydraulic retention time 3.0h) together for sludge-water separation.

[0034] The waste water after chemical phosphorus removal from the sedimentation tank 4 enters the contact oxidation tank 5 (hydraulic retention time 6.5h), where a part of the organic matter is oxidized and degraded into ca...

Embodiment 3

[0038] The water quality of phosphorus-containing organic wastewater 1 COD≥5000mg / L, BOD 5 ≥3000mg / L, TP≥70mg / L, it enters the mixing reactor 3 (hydraulic retention time 40min), and the FeCl 3 (dosing amount 400mg / L) iron salt 2, the mud slag that returns from sludge tank 9 fully mixes, and the phosphorus in the waste water and iron salt generation chemical reaction generates the insoluble sediment of phosphorus, and precipitation is poisonous to aerobic microorganism simultaneously sulfide. Then, the wastewater and sediment discharged from the mixing reactor 3 are mixed with the excess sludge returned from the excess sludge conditioning tank 8, and flow into the sedimentation tank 4 (hydraulic retention time 4.0h) together for sludge-water separation.

[0039] The wastewater after chemical phosphorus removal from the sedimentation tank 4 enters the contact oxidation tank 5 (hydraulic retention time 9.0 h), where a part of the organic matter is oxidized and degraded into carb...

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Abstract

The invention relates to a treatment system and an operation method of phosphorus-containing organic wastewater. A chemical phosphorus removal system is combined with an aerobic biochemical system, thus forming a system that removes phosphate and organic matters in the effluent of an aerobic removal system. The chemical phosphorus removal system consists of a chemicals feeding system, a mixed reaction pool, a sedimentation pool, a residual sludge refluxing system and a chemical sludge refluxing system. The aerobic biochemical system consists of an aerobic contact oxidation system and an aerobic activated sludge system. During the process of chemical phosphorus removal, sulfide and part of the organic matters can be removed simultaneously, thus causing the subsequent aerobic process to run stably and reducing running cost thereof. The residual sludge of the aerobic biochemical system is subjected to aeration and then refluxes to the chemical phosphorus removal system, and flocculation is absorbed and chemical sludge flocculating constituents are settled by utilizing residual activated sludge, thus improving chemical phosphorus removal efficiency. Part of the chemical phosphorus removal sludge refluxes after aeration, thus reducing the feeding amount of chemicals and reducing running cost. The treatment system and the operation method can cause organic wastewater with high phosphorus concentration to reach strict discharge standard after being treated.

Description

technical field [0001] The invention discloses a process for treating phosphorus-containing organic wastewater, which belongs to the technical field of environmental protection and wastewater treatment. Specifically, it is a treatment system and operation method for treating phosphorus-containing organic wastewater discharged from an anaerobic system by using a combination of chemical phosphorus removal method and aerobic biological process. Background technique [0002] Anaerobic biological treatment technology has been widely used in the treatment of high-concentration organic wastewater discharged from industries such as fermentation alcohol. However, due to the slow proliferation of anaerobic microbial cells and the small demand for nitrogen and phosphorus nutrients, the removal of nitrogen and phosphorus nutrients in wastewater by anaerobic systems is very limited, and the concentrations of organic matter and nitrogen and phosphorus nutrients in anaerobic effluent water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/12C02F1/58C02F1/52
CPCY02W10/10
Inventor 张书廷马华继
Owner TIANJIN UNIV
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