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Granular sludge preparation method and domestic sewage treatment method

A granular sludge and domestic sewage technology, applied in water/sludge/sewage treatment, biological water/sewage treatment, sustainable biological treatment, etc., can solve the problems of easy clogging of membrane pores and high operating costs, and achieve compact structure, Good settling performance and the effect of reducing membrane fouling

Inactive Publication Date: 2018-03-23
DONGGUAN VANKE BUILDING TECHN RES
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  • Description
  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing granular sludge and a method for treating domestic sewage in view of the problem that the membrane pores of the above-mentioned membrane bioreactor are easily blocked and the operating cost is high.

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  • Granular sludge preparation method and domestic sewage treatment method
  • Granular sludge preparation method and domestic sewage treatment method

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preparation example Construction

[0032] Granular sludge preparation method of the present invention comprises the following steps:

[0033] (a) in the reactor (such as figure 1 The membrane bioreactor shown) was inoculated with flocculent sludge from the secondary sedimentation tank of domestic sewage plant. Specifically, in this step, the sludge concentration in the reactor after inoculating the flocculent sludge is greater than 8 g-MLSS / L. Of course, the sludge concentration in the reactor can also be greater or less than the above value, but it will affect the time for the formation of granular sludge.

[0034] (b) passing artificial waste water (i.e. artificially prepared water) through the reactor (e.g. figure 1 container 10) in the reactor, while the water in the reactor is intermittently aerated, and the artificial waste water contains glucose at a concentration of 200-500mg / L, ammonium sulfate at a concentration of 60-230mg / L, and ammonium sulfate at a concentration of 40-110mg / L L of potassium dih...

Embodiment 1

[0041] in such as figure 1 The membrane biosludge reactor shown was initially inoculated with fresh flocculent sludge (that is, activated sludge) from the secondary sedimentation tank of the domestic sewage treatment plant. The flocculent sludge in this example was taken from Guangzhou Lijiao Wastewater Treatment Plant. , figure 2 The picture on the upper left in the figure is the fresh flocculent sludge just inoculated.

[0042] In the initial stage of the experiment, the influent water contained 500mg / L of glucose, 230mg / L of ammonium sulfate, and 110mg / L of potassium dihydrogen phosphate, and the strains with denitrification and phosphorus removal functions were quickly screened out. The aeration method was: aeration for 4h-under anoxic conditions Static 4h-aeration 4h, as a cycle of aerobic / anoxic alternating process, using perforated aeration. At the same time, a certain amount of trace element nutrient solution (mixed with the incoming water) is added to the incoming ...

Embodiment 2

[0045] also adopted figure 1 The integrated membrane bio-sludge reactor wastewater treatment system is used to inoculate the flocculent sludge in the secondary sedimentation tank of domestic sewage plant, cultivate granular sludge and treat artificial simulated wastewater.

[0046] Artificial waste water is used as the influent. In the initial stage of the reactor, the influent water contains 500mg / L of glucose, 230mg / L of ammonium sulfate, and 110mg / L of potassium dihydrogen phosphate. It adopts aeration for 4h-under anoxic condition for 4h-aeration 4h cycle alternate operation mode, the operation time is 45 days. The average ammonia nitrogen removal efficiency reaches 95.8%, the total nitrogen removal efficiency reaches 75.3%, the phosphorus removal efficiency reaches 70%, and the influent organic matter removal rate reaches 95%.

[0047] In the second stage, keep the aeration method unchanged, the influent water includes 200mg / L of glucose, 60mg / L of ammonium sulfate, and ...

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Abstract

The invention provides a granular sludge preparation method and a domestic sewage treatment method. The granular sludge preparation method comprises the following steps: (a) inoculating flocculent sludge from a secondary sedimentation tank of a domestic sewage treatment plant in a reactor; (b) enabling artificial wastewater to flow through the reactor, and intermittently aerating the water in thereactor at the same time, wherein the artificial wastewater contains glucose with a concentration of 200-500 mg / L, ammonium sulfate with a concentration of 60-230 mg / L, and potassium dihydrogen phosphate with a concentration of 40-110mg / L; (c) when a sludge volume index SVI30 / SVI5 in the reactor reaches 1, completing the preparation of the granular sludge. According to the granular sludge preparation method, the flocculent sludge is acclimated into the granular sludge; the granular sludge has the advantages of dense structure, rich biological population, good settling performance, strong impact load resistance, space saving, stronger toxicity resistance, and the like, not only having good slurry-water separation ability, but also being capable of making up for the influence of low temperature on biological nitrogen and phosphorus removal efficiency by means of high-concentration biomass.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for preparing granular sludge and a method for treating domestic sewage. Background technique [0002] Water is an irreplaceable resource necessary for human beings and one of the important pillars for the sustainable development of society. In recent years, my country's urbanization process has developed rapidly, and along with the rapid development of industrialization, people's demand for water has increased. However, water pollution incidents have occurred frequently, such as the outbreak of blue-green algae in Taihu Lake, etc., which has changed the supply of water resources. more tense. Among them, the problem of eutrophication of water body due to excessive discharge of nitrogen and phosphorus is particularly prominent. [0003] Membrane bioreactors (MBRs) are a new type of high-efficiency water treatment technology that combines membrane separation techno...

Claims

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Application Information

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IPC IPC(8): C02F3/12
CPCC02F3/1268Y02W10/10
Inventor 杨伟明王广志张盛斌袁佳佳王蕴甄巍
Owner DONGGUAN VANKE BUILDING TECHN RES
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