Double sludge oxidation ditch denitrification phosphorus removal device and method

A technology of denitrification phosphorus removal and oxidation ditch, which is applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc. Nitrifying bacteria carbon source competition and other issues, to achieve the effect of guarantee, increase biomass, and improve nitrification rate

Active Publication Date: 2020-08-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The C / N and C / P of sewage in southern my country are generally low. Using traditional biological treatment processes, phosphorus removal bacteria and denitrification bacteria will compete for carbon sources, and the task of nitrogen and phosphorus removal cannot be efficiently completed.

Method used

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  • Double sludge oxidation ditch denitrification phosphorus removal device and method
  • Double sludge oxidation ditch denitrification phosphorus removal device and method
  • Double sludge oxidation ditch denitrification phosphorus removal device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as Figure 1 to Figure 4 As shown, a double-sludge oxidation ditch denitrification dephosphorization device includes an oxidation ditch 1, and the oxidation ditch 1 is provided with successively connected water outlet areas, a pre-anaerobic area 23, an anaerobic area 24, and an independent nitrification area along the flow direction of sewage. Zone 26, anoxic zone 25 and water outlet zone, independent nitrification zone 26 is isolated from anaerobic zone 24 and anoxic zone 25 by first baffle plate 11 and second baffle plate 28 respectively, and along the flow direction of sewage, first Mud-water separation zone 3, packing zone 5, second mud-water separation zone 7 and steady flow zone 8, so that the main channel of oxidation ditch 1 (except the area except independent nitrification zone 26) and the sludge in the independent nitrification zone 26 are mutually Independent, forming a dual sludge system that does not interfere with each other. The packing area 5 is us...

Embodiment 2

[0046] The Carrousel type oxidation ditch with the secondary settling tank 22 and the sludge return line can also be upgraded, that is, if Figure 5 As shown, the water outlet device in the pre-anaerobic zone 23 is canceled, and the mud-water mixture is sent to the secondary sedimentation tank 21 through the original outlet ditch 21 after the micro-exposure machine 10, and the sludge separated by the mud-water separation device enters again. In the anaerobic zone 23. Transform the upper part of a corridor of the Carrousel type oxidation ditch into Figure 5 In the independent denitrification zone 26 shown in , except that an inverted umbrella type aerator is left at the rear end of the anoxic zone for micro-aeration, the rest of the micro-aerators stop running. The rest of the operating steps are the same as those in Embodiment 1, which can also achieve better processing effects.

[0047] An outlet ditch is provided in the oxidation ditch of the pre-anaerobic zone to communi...

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Abstract

The invention discloses a double sludge oxidation ditch denitrification phosphate-removing apparatus and a method thereof. The apparatus comprises an oxidation ditch; an anaerobic zone, an anoxic zone and a water outlet zone which are communicated in order are arranged in the oxidation ditch, an independent nitrification zone is arranged between the anaerobic zone and the anoxic zone along the sewage flowing direction, a pre-anaerobic zone is arranged between the anoxic zone and the anaerobic zone, the independent nitrification zone is separated with the anaerobic zone and the anoxic zone through a first baffle plate and a second baffle plate, a first mud-separation zone, a filling material zone, a second mud-separation zone and a current stabilization zone are arranged in order along the sewage flowing direction, and nitrobacteria is enriched in the filling material zone. The denitrification phosphate-removing method is characterized in that a main channel of the oxidation ditch is always in an anaerobic / anoxic state, so that the denitrifying phosphorus-removing bacteria can be a dominant bacteria, the filling material is employed for hanging a membrane in the independent nitrification zone, so that a stable living environment is provided for nitrobacteria, nitrobacteria biomass in the independent nitrification zone is increased, nitrification rate is increased, and denitrification phosphate-removing effect can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a double sludge oxidation ditch denitrification phosphorus removal device and method. Background technique [0002] Oxidation ditch, also known as continuous loop reactor, is a variant of activated sludge process. The oxidation ditch has a special hydraulic flow state, which has the characteristics of both a completely mixed reactor and a plug-flow reactor. There is an obvious concentration gradient of dissolved oxygen in the oxidation ditch. The cross-section of the oxidation ditch is generally rectangular or trapezoidal, and the planar shape is mostly elliptical. Oxidation ditch forms aerobic zone, anoxic zone and anaerobic zone in space, has good denitrification function, high degree of purification, impact resistance, stable and reliable operation, simple operation, convenient operation management, simple maintenance and low investment , low energy consumption, goo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/308
Inventor 张倩范子皙谭斌李孟
Owner WUHAN UNIV OF TECH
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