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Device and method for side-flow enhanced biological phosphorus removal process developed based on carbon source in excess sludge

A technology of excess sludge and internal carbon source, applied in chemical instruments and methods, water pollutants, special compound water treatment, etc., can solve problems such as complex operation process, reduce dependence, reduce operating costs, and save carbon source investment. added effect

Inactive Publication Date: 2021-01-05
BEIJING UNIV OF TECH
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  • Description
  • Claims
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Problems solved by technology

Due to the excess sludge produced by the biological phosphorus removal process, it is often necessary to set up a fermentation tank for treatment, and the operation process is complicated

Method used

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  • Device and method for side-flow enhanced biological phosphorus removal process developed based on carbon source in excess sludge

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Embodiment Construction

[0018] The patent application is further described in conjunction with accompanying drawings and examples: as figure 1 Shown, the present invention comprises city sewage water tank (1) to be connected with anoxic zone (3) of mainstream reaction zone by influent peristaltic pump (2), and anoxic zone is connected with aerobic zone (4), and air pump (5) The rotameter (6) is connected to the aeration head in the aerobic zone, the aerobic zone is connected to the anoxic zone through the nitrifying liquid return pump (7), and the effluent from the aerobic zone is connected to the secondary settling tank (8), which includes Drain holes (9) and bottom valves (10), part of the sludge in the secondary settling tank is connected to the side flow fermentation zone (12) through the first sludge return pump (11), and the other part of the sludge in the secondary settling tank passes through the second sludge The reflux pump (13) and the side flow fermentation zone are connected to the anoxi...

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Abstract

The invention discloses a device and a method for a side-flow enhanced biological phosphorus removal process developed based on a carbon source in excess sludge, and belongs to the field of biologicalsewage treatment. According to the method, a part of returned sludge in a secondary sedimentation tank enters a side-flow fermentation zone, activated sludge is used as a matrix of phosphorus-accumulating bacteria Tetrosphaera with fermentation capability, phosphate is released, an internal carbon source is absorbed and stored, and volatile fatty acid VFA is produced by fermentation and is used by other heterotrophic bacteria. The other part of the returned sludge, the effluent of the side-flow fermentation zone and municipal sewage inflow enter an anoxic zone of a main-flow reaction zone together, denitrification nitrogen and phosphorus removal are achieved by utilizing an internal carbon source absorbed and stored in the fermentation zone and volatile fatty acid VFA generated in the fermentation zone, and the effluent of the anoxic zone flows into an aerobic zone for aerobic phosphorus absorption and nitrification. According to the invention, a side-flow continuous flow process is utilized, a front anaerobic zone is omitted, the addition of a carbon source is greatly saved, and the dependence on inlet water VFA is reduced.

Description

technical field [0001] The invention relates to a device and method for a side flow enhanced biological phosphorus removal process developed based on carbon sources in excess sludge, and belongs to the technical field of sewage biological treatment. Background technique [0002] The traditional theory of biological phosphorus removal holds that in the anaerobic zone, phosphorus-accumulating bacteria absorb volatile fatty acids VFA in water and store them in the cells, releasing phosphate into the water body. Under aerobic conditions, phosphorus-accumulating bacteria utilize the internal carbon stored in the cells The source provides the energy and carbon source required for growth, excessively absorbs phosphorus in the water body and stores it in the cell body in the form of polyphosphate. Sewage treatment plants using biological phosphorus removal technology generally have the problem of insufficient carbon sources in the influent, and adding additional carbon sources will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34C02F101/10
CPCC02F3/308C02F3/34C02F2305/06C02F2101/105
Inventor 曾薇樊志伟马晨阳彭永臻
Owner BEIJING UNIV OF TECH
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