A phosphorus accumulating bacterium with high phosphorus removal effect at low temperature and its screening method and application

Abstract

The invention discloses a phosphorus-accumulating bacterium strain with higher phosphorus removal effect at low temperature, which is characterized in that the collection number of the phosphorus-accumulating bacterium is CCTCC NO:M2014140. The phosphorus-accumulating bacterium strain is screened from Chaohu Lake sediment by low-temperature enrichment culture and a dilution mixed plate method, and can efficiently remove phosphorus at low temperature; the strain can still effectively absorb the carbon source in wastewater at 8 DEG C and convert the carbon source into poly-beta-polyhydroxyalkanoats, and meanwhile, release polyphosphates stored in the cells so as to obtain energy; the poly-beta-polyhydroxyalkanoats in the cells are oxidized in the aerobic process to generate energy, and the strain absorbs abundant phosphorus from the wastewater to as to accumulate the phosphorus in the form of polyphosphates. The strain has wide temperature adaptability, has favorable phosphorus-accumulating effect at 8-30 DEG C, and can be used for wastewater treatment in winter or under cold conditions.

Description

technical field [0001] The invention relates to a phosphorus accumulating bacterium with high phosphorus removal effect at low temperature, a screening method and application thereof, and belongs to the field of environmental microorganisms. Background technique [0002] Water pollution is an important problem faced by all countries in the world, and this problem is still serious in a developing country like my country. In recent decades, my country's population has grown rapidly, urbanization has accelerated, urban sewage discharge has increased, and water pollution is very serious and has a clear trend of deterioration. With the increasing water pollution, the problem of water eutrophication is becoming more and more prominent. In the past ten years, the proportion of eutrophic water bodies in my country has increased from 50% to 55%, while the proportion of eutrophic water bodies has dropped from 3.2% to 0.53%. The eutrophication of the water body will cause the mass re...

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