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Double sludge oxidation ditch denitrification phosphate-removing apparatus and method thereof

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: 2017-08-15
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 phosphate-removing apparatus and method thereof
  • Double sludge oxidation ditch denitrification phosphate-removing apparatus and method thereof
  • Double sludge oxidation ditch denitrification phosphate-removing apparatus and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

Embodiment 2

[0046] The Carrousel oxidation ditch with the secondary settling tank 22 and the sludge return line can also be upgraded, that is, such as Figure 5 As shown, the water outlet device in the pre-anaerobic zone 23 is cancelled. After the micro-aerator 10, the mud-water mixture is sent to the secondary settling tank 21 through the original outlet ditch 21, and the sludge separated by the mud-water separator re-enters Anaerobic zone 23. Transform the upper part of a corridor of the Carrousel oxidation ditch into Figure 5 In the independent denitrification zone 26 shown in the figure, except for an inverted umbrella type aerator at the back end of the hypoxic zone for micro-aeration, the other micro-aerators are stopped. The rest of the operation steps are the same as in the first embodiment, and a better processing effect can also be achieved.

[0047] An outlet ditch is provided in the oxidation ditch of the pre-anaerobic zone to communicate with a secondary settling tank, the outl...

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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, and particularly relates to a double sludge oxidation ditch denitrification and phosphorus removal device and method. Background technique [0002] Oxidation ditch, also known as Continuous loop reactor, is a variant of the activated sludge process. The oxidation ditch has a special hydraulic flow pattern, which has the characteristics of a completely mixed reactor and a plug flow reactor. There is a clear dissolved oxygen concentration gradient in the oxidation ditch. The cross section of the oxidation ditch is generally rectangular or trapezoidal, and the plane shape is mostly elliptical. Oxidation ditch forms aerobic, anoxic and anaerobic zones in space. It has good denitrification function, high purification degree, impact resistance, stable and reliable operation, simple operation, convenient operation and management, simple maintenance and low investment. , Low energy consumption, goo...

Claims

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Application Information

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Patent Type & Authority Applications(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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