Enhanced nitrogen and phosphorus removal device and technology for sewage

A technology for nitrogen and phosphorus removal and sewage, which is applied in biological water/sewage treatment, light water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problems affecting the effect of biological phosphorus removal and the unstable effect of nitrogen and phosphorus removal , to achieve stable water output, low operating costs, and efficient treatment

Inactive Publication Date: 2016-07-20
浙江一清环保工程有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0006] However, when the influent carbon source level is high, A / A / O can achieve better nitrogen and phosphorus removal effects, but when the influent carbon-nitrogen ratio is relatively low, the nitrogen and phosphorus removal effect is unstable, and the pollution The mixed solution of mud return will inhibit the phosphorus release process of the phosphorus accumulating bacteria and affect the effect of biological phosphorus removal

Method used

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  • Enhanced nitrogen and phosphorus removal device and technology for sewage

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Embodiment 1

[0023] refer to figure 1 , an enhanced denitrification and dephosphorization device for sewage, the device includes a pretreatment tank, an anaerobic tank, anoxic tank, an aerobic tank, a bacteria separator, a bacteria and algae synergistic reactor, a sedimentation tank and Disinfection tank, the aerobic tank is connected with the anoxic tank through the mixed liquid return pipeline, the strain separator is connected with the anaerobic tank through the first sludge return pipeline, and the sedimentation tank is connected with the anaerobic tank through the second sludge return pipeline It is connected with the synergistic reaction tank of bacteria and algae, the first sludge return pipeline and the second sludge return pipeline are equipped with corresponding sludge pumps, and the mixed liquid return pipeline is equipped with sewage pumps. The bacteria-algae synergistic reaction pool is provided with biological fillers, and the bacteria-algae synergistic reaction pool adopts b...

Embodiment 2

[0025] The water quality of domestic sewage in a rural area is: pH7~8, COD200~400mg / L, TP1.0~5.0mg / L, NH 3 -N30~60mg / L, SS100~200mg / L, the effluent is required to meet the Class I B standard in the Discharge Standard of Pollutants for Urban Sewage Treatment Plants GB18918-2002.

[0026]The influent of the above-mentioned sewage is firstly pretreated and then enters the anaerobic tank. In the anaerobic tank, it is mixed with the return sludge of the strain separator. In the anaerobic tank, the anaerobic hydrolysis reaction and phosphorus-accumulating bacteria release phosphorus mainly occur At this time, the carbon source level in the activated sludge reaches the highest level, and the hydraulic retention time of the anaerobic tank is controlled at 1.5 to 4 hours; the effluent from the anaerobic tank enters the anoxic tank, and the mixed liquid returned from the anoxic tank and the aerobic tank The process of denitrification and phosphorus removal is carried out, and the hydrau...

Embodiment 3

[0031] The sewage water quality of a hospital is pH5~6, COD800~1200mg / L, TP6.0~15.0mg / L, NH 3 -N50~80mg / L, SS150~300mg / L, the effluent should reach pH6~9 after treatment, COD3 -N<10 mg / L, SS<15 mg / L.

[0032] Treatment process is with reference to embodiment 2, and the hydraulic retention time of anaerobic pond is controlled at 3 hours, and the hydraulic retention time of anoxic pond is controlled at 4.5 hours, and the special high-efficiency denitrification and phosphorus removal bacterial classification added in the aerobic pond is Bacillus megaterium, The addition amount is 7.5% by volume, the hydraulic retention time of the aerobic tank is controlled at 10 hours, the mud-water separation time of the strain separator is controlled at 2 hours, the reflux rate of the strain separator is 50%, and the biofiller in the bacteria-algae synergistic reaction tank It is a packing ball with a specific surface area of ​​60m 2 / g, the microalgae is spirulina, its dosage is 8.5% by volu...

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Abstract

The invention relates to an enhanced nitrogen and phosphorus removal device and technology for sewage.The technology comprises the steps that the sewage is pretreated to enter an anaerobic tank to be subjected to a mixing reaction with sludge flowing back from a strain separator and then enters the strain separator sequentially through an anoxic tank and an aerobic tank; the strain separator separates strains in mixed liquid, the high-density strains are set to the bottom and flow back to the anaerobic tank through a pump, the low-density strains enter a strain-algae concerted reaction tank together with water flow, biological stuffing is arranged in the concerted reaction tank, the synergistic effect of microalgae and the strains is formed in a system, part of the microalgae and the strains form an algae-strain biological film, and then the nitrogen and phosphorus removal effect of the system is enhanced; yielding water is treated through a setting tank and disinfected, and sludge in the setting tank flows back to the algae-strain concerted reaction tank.According to the technology, the problems that when the urban sewage is treated through an existing A2 / O technology, the nitrogen and phosphorus removal effect is poor, and the cost is high are solved.The treatment technology has the advantages of being efficient in treatment, stable in water yielding, low in operation cost and the like and is economical, environmentally friendly and capable of achieving sustainable cyclic development.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a sewage enhanced denitrification and dephosphorization device and process. Background technique [0002] At present, with the process of industrialization and the improvement of urbanization, the eutrophication of water bodies caused by the large discharge of nitrogen and phosphorus has rapidly developed into an important environmental problem. The mechanism of traditional biological nitrogen and phosphorus removal basically includes three states: anaerobic, anoxic and aerobic. Under anaerobic conditions, phosphorus accumulating bacteria consume glycogen, hydrolyze intracellular polyphosphorus (Poly-P) into orthophosphate and release it to the outside of the cell, and obtain energy from it. Fatty acids (VAF) are stored as intracellular carbon source stores (mainly in the form of PHB). Under aerobic conditions, phosphorus accumulating bacteria 2 It...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/32C02F1/76C02F1/78C02F3/30C02F3/322C02F3/34C02F2001/007C02F2101/105C02F2101/16C02F2209/06C02F2209/08C02F2209/10C02F2209/15
Inventor 吴昊陈建军周玲田帅慧李明
Owner 浙江一清环保工程有限公司
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