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Mobile integrated sludge anaerobic acidification liquid denitrification and dephosphorization treatment device

An anaerobic acidification, nitrogen and phosphorus removal technology, applied in the field of water pollution treatment, can solve the problems of easy release under anaerobic conditions, large sludge output, etc., and achieves a small footprint, flexible use and simple structure. Effect

Inactive Publication Date: 2012-09-19
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biological method is to use the excessive absorption of soluble phosphate in sewage by microorganisms under aerobic conditions, and then precipitate and separate to remove phosphorus, but the phosphorus in sludge is easily released under anaerobic conditions
The chemical method is characterized by high phosphorus removal rate, stable treatment results, and the sludge will not re-release phosphorus in the process of treatment and disposal to cause secondary pollution, but the output of sludge is relatively large

Method used

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  • Mobile integrated sludge anaerobic acidification liquid denitrification and dephosphorization treatment device
  • Mobile integrated sludge anaerobic acidification liquid denitrification and dephosphorization treatment device
  • Mobile integrated sludge anaerobic acidification liquid denitrification and dephosphorization treatment device

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Embodiment 1

[0030]The capacity of this device to treat sludge anaerobic acidification liquid is 6 tons / day. The main design parameters and dimensions of the device are as follows:

[0031] The size of the whole container is 11.8m×2.13m×2.72m. The material of the dosing tank 1 is plastic, and the size is 0.37m×0.37m×2.12m. The tap water pipe of the dosing tank is made of UPVC material, DN20mm. The pH adjustment tank 5, the coagulation sedimentation tank 7, and the aeration tank 9 have the same structure and are all made of plastic, with a size of Φ1.2m and a height of 1.87m. Maximum volume 2.60m 3 . The water inlet pipe 27 is a Φ0.4m UPVC pipe. The mud discharge pipe 28 adopts UPVC pipe, DN80mm. After the acidification solution enters the first pH adjustment tank, it enters the coagulation sedimentation tank 7 through the lift pump, and CaO is added to react with TP in the wastewater to form a small precipitate suspension. The molar dosage of CaO is equivalent to 1.6 times the molar c...

Embodiment 2

[0034] The structure of the device is the same as in Example 1, and the device obtained is used to process the sludge acidification solution of a certain urban sewage plant, and the water quality parameter SCOD of the anaerobic acidification solution is Cr 7210 mg / L, NH 3 -N 440 mg / L, T-N 492 mg / L, SOP 111.9 mg / L, TP 129.5 mg / L. NH in acidified solution after treatment 3 The removal rate of TN content is less than 10mg / L, and the removal rate is over 95%; the removal rate of TN content is 17mg / L; the removal rate is over 90%; SOP 3mg / L; T-P 5mg / L; COD content 5211mg / L. The carbon-nitrogen ratio and carbon-phosphorus ratio are 659 and 1042 respectively, so the acidification solution is suitable as an additional carbon source for nitrogen removal in sewage treatment plants.

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Abstract

The invention belongs to the technical field of water pollution treatment and control in environmental engineering and particularly relates to a mobile integrated sludge anaerobic acidification liquid denitrification and dephosphorization treatment device, which consists of a chemical dosing module, a reaction module, a sludge treatment module and an electrical control cabinet, wherein the modules are connected together through pipes and valves. The chemical dosing module comprises a chemical dosing tank, a water inlet, a chemical dosing tank agitator and a chemical dosing pump. The reaction module comprises a potential of hydrogen (pH) regulating tank, a coagulating sedimentation tank, a stripping tower, an acidification liquid inlet, a lift pump, a regulating valve, a sewage pipe and a sludge drain pipe. The sludge treatment module comprises a sludge tank, a plate-and-frame filter press and a screw pump. The electrical control cabinet is respectively connected with the agitator and the pumps. The entire device can be installed in a container. After the sludge anaerobic acidification liquid is treated by the device, the concentration of nitrogen and phosphorus in the acidification liquid is lower, the carbon to nitrogen ratio and the carbon to phosphorus ratio are higher and the acidification liquid can be directly used as an external carbon source for denitrification in a sewage treatment plant. The mobile integrated sludge anaerobic acidification liquid denitrification and dephosphorization treatment device has the advantages of simple structure, novel design, high use flexibility, good treatment effect and small occupied area.

Description

technical field [0001] The invention belongs to the technical field of water pollution treatment, and in particular relates to a mobile integrated treatment device for nitrogen and phosphorus removal in sludge anaerobic acidification liquid. Background technique [0002] With the development of social economy and urbanization, urban sewage treatment plants have sprung up and put into operation in various cities. As of December 2011, more than 3,000 sewage treatment plants have been built and operated in my country, and the sewage treatment capacity is 136 million tons / day, and the amount of dry sludge produced is about 13,700 to 17,000 tons of DS (dry solid) / day. A large amount of sludge is generated, which not only increases the difficulty of treatment, but also increases the cost of disposal. The problem of sludge disposal is even more troublesome for sewage treatment plants. Therefore, how to utilize and dispose of sludge resources is an urgent problem and research hotspo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F11/12C02F1/52C02F1/20
Inventor 陆颢文代瑞华刘燕刘翔张强宋安安周蓓吕黎辉吴瑾严杨蔚
Owner FUDAN UNIV
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