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Method for rapidly solving problem of filamentous bacteria sludge bulking through hunger treatment

A sludge bulking and filamentous bacteria technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem that filamentous bacteria cannot absorb organic matter from the outside world, and the storage capacity of organic matter is weak. , without storage and other problems, to achieve the effect of performance recovery, significant selectivity, and simple processing methods

Active Publication Date: 2013-04-03
BEIJING DRAINAGE GRP CO LTD
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Problems solved by technology

The vast majority of filamentous bacteria are absolute aerobic and heterooxic microorganisms. Although filamentous bacteria have a larger specific surface area and are easier to survive under conditions of low substrate concentration than mycolloid bacteria, most species Filamentous bacteria do not have the ability to store organic matter or the storage ability is weak
Therefore, when there is no substrate supply from the outside world, filamentous bacteria cannot take in organic matter from the outside world, and there is no intracellular polymer for their own decomposition and utilization, so they will inevitably suffer great damage

Method used

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  • Method for rapidly solving problem of filamentous bacteria sludge bulking through hunger treatment
  • Method for rapidly solving problem of filamentous bacteria sludge bulking through hunger treatment
  • Method for rapidly solving problem of filamentous bacteria sludge bulking through hunger treatment

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example 1

[0026] Before the starvation treatment test, artificially synthesized wastewater was used as the treatment object (influent sodium acetate, ammonium chloride and potassium dihydrogen phosphate provided carbon source, nitrogen and phosphorus respectively, COD=300 mg / L, NH4-N=15 mg / L, PO4-P=3 mg / L), the influent load is 1.2 kgCOD / KgMLSS / d, and the mud is raised in the SBR with an effective volume of 5L ( figure 1 ), maintain the sludge concentration at 2000-2500 mg / L, the sludge age is 15 days, the temperature is controlled at 20°C, the drainage ratio is 50%, the reactor runs 4 cycles per day, 6 hours per cycle, each cycle Including 5 minutes of anoxic water inflow and 115 minutes of anoxic stirring (120 minutes of anoxic time), 180 minutes of aerobic aeration (180 minutes of aerobic time), 50 minutes of sedimentation, 10 minutes of drainage and idle. Before starvation treatment, the sludge has good settling performance and denitrification and phosphorus removal ability, the S...

example 2

[0029] Before the starvation treatment test, the actual domestic sewage of a university in Beijing was used as the treatment object (COD=240±50 mg / L, NH4-N=65.2±21.3 mg / L, PO4-P=6.4±2.0 mg / L), and the The water load is 2.3 kgCOD / KgMLSS / d, and the sludge is raised in the SBR with an effective volume of 12L. Maintain the sludge concentration at about 2500 mg / L, the sludge age is 15 days, the temperature is room temperature (about 21°C), the dissolved oxygen concentration in the aerobic section is maintained at 2.0 mg / L, and the drainage ratio is 50%. The reactor runs 4 cycles per day, 6 hours per cycle, each cycle includes 10 minutes of anoxic water inflow, 110 minutes of anoxic stirring (anoxic time is 120 minutes), 180 minutes of aerobic aeration (good Oxygen time is 180 minutes), 50 minutes of settling and 10 minutes of draining and idle. Before starvation treatment, the sludge has good settling performance and nitrogen and phosphorus removal ability, the SVI of the sludge i...

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Abstract

A method for rapidly solving problem of filamentous bacteria sludge bulking through hunger treatment belongs to the field of biochemical process sewage disposal technology. According to the method, different physiological properties of filamentous bacteria and zoogloea bacteria are utilized and an anaerobic hunger treatment manner is carried out on bulking sludge, therefore, a large number of filamentous bacteria which has large surface area but poor storage ability die, zoogloea bacteria which has smaller surface and excellent storage ability survives through degradation for utilization of polymer in cells when in hunger state, so that the problem of sludge bulking is solved efficiently and the cost is low. The method comprises the following steps of 1. cutting off inflow source for stopping dissolved oxygen supply; 2. keeping the system in continuous anaerobic hunger stirring state for 3-10 days; and 3. running the system in an aerobiotic state or an anoxia state alternately so as to recover the sludge activity and nitrogen and phosphorus removal ability rapidly. The method does not need extra economic energy consumption, and is excellent in selective kill of filamentous bacteria, and the returning cycle of zoogloea bacteria activity of later period is short, therefore, the method can be used for solving the problem of filamentous bacteria sludge bulking rapidly.

Description

technical field [0001] The invention relates to a method for quickly and economically solving the common filamentous bacteria sludge swelling problem in the sewage treatment process of the activated sludge method, which is suitable for the treatment of domestic sewage and industrial wastewater in large, medium and small cities and towns using the activated sludge method factory. Background technique [0002] Activated sludge method is the most widely used sewage treatment method in urban sewage treatment plants, which has the advantages of economy and good treatment effect. Activated sludge is mainly composed of microorganisms that can absorb and degrade organic matter and pollutants such as nitrogen and phosphorus in sewage. In the biochemical tank of the sewage treatment plant, the activated sludge is mixed with the sewage entering the biochemical tank, and is in a suspended state. The treated mud-water mixture enters the secondary sedimentation tank to realize the separa...

Claims

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Application Information

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IPC IPC(8): C02F3/34
Inventor 彭永臻杨雄宋姬晨王淑莹郭建华
Owner BEIJING DRAINAGE GRP CO LTD
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