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Culture method of biological phosphorus removal granular sludge

A technology for granular sludge and biological phosphorus removal, which is applied in the field of environmental engineering and can solve the problems of long sedimentation time and low content of phosphorus accumulating bacteria.

Pending Publication Date: 2022-03-15
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traditional biological phosphorus removal has a long precipitation time and the content of phosphorus accumulating bacteria in the traditional aerobic granular sludge is small, and provides a method for cultivating biological phosphorus removal granular sludge

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the drawings and description of the drawings.

[0045] A method for cultivating biological phosphorus removal granular sludge. SBR reactor is inoculated with aerobic pool sludge. The concentration of inoculated sludge is about 3500mg / L. Under the condition of reaction temperature of 10-30℃, SBR reactor runs every day 4 cycles, each cycle is followed by water intake, anaerobic cycle, aerobic aeration, sedimentation, drainage, and static operation in an anaerobic / aerobic alternating manner;

[0046] On the first day of operation, in each cycle, the water intake time is 15 minutes, the anaerobic cycle time is 85 minutes, the aerobic aeration time is 210 minutes, the settling time is 30 minutes, the drainage time is 15 minutes, and the standing time is 5 minutes. min, the aeration in the SBR reactor uses a microporous aeration sand head, and the aeration rate is set at 2L / min;

[0047] From the twent...

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Abstract

The invention discloses a culture method of biological phosphorus removal granular sludge, and relates to the field of environmental engineering, in particular to a culture method of biological phosphorus removal sludge. The invention aims to solve the problems that the traditional biological phosphorus removal precipitation time is long and the content of phosphorus-accumulating bacteria in the traditional aerobic granular sludge is low. According to the method, enhanced biological phosphorus removal (EBPR) and an aerobic granular sludge process are combined, and the biological phosphorus removal granular sludge in which white particles and yellow particles coexist is cultivated in a reactor by gradually shortening the precipitation time, increasing the concentration of a carbon source and replacing the carbon source under the condition that the C / P ratio is kept between 30 and 40. The granular sludge cultured by the method is high in settling speed, the removal rate of PO4 < 3->-P is 85% or above, and the phosphorus release amount of an anaerobic section can reach 60 mg / L or above.

Description

technical field [0001] The invention relates to a method for cultivating biological phosphorus removal granular sludge, which belongs to the field of environmental engineering. Background technique [0002] Enhanced biological phosphorus removal (EBPR) is a commonly used wastewater phosphorus removal method. The enhanced biological phosphorus removal is to enrich the phosphorus accumulating bacteria in the activated sludge through anaerobic / aerobic alternating operation. Under anaerobic conditions, phosphorus accumulating bacteria absorb volatile fatty acids (VFA) in vitro to synthesize intracellular polymer polyβ-hydroxyalkanoate (PHA), and the phosphate produced by the hydrolysis of polyphosphoric acid in the body is excreted. out of the body. Under aerobic conditions, phosphorus accumulating bacteria oxidize the intracellular polymer poly-β-hydroxyalkanoate to obtain the energy required for growth, glycogen replenishment and phosphorus uptake, and at the same time, abso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/12C12N1/00
CPCC02F3/301C02F3/1205C12N1/00Y02W10/10
Inventor 何瑜何成达相延铮
Owner YANGZHOU UNIV
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