Method for treating dispersant low-temperature domestic sewage by floating stuffing segregating technique

Abstract

The present invention relates to sewage treatment, and is floated stuffing latticing method of treating dispersed low temperature domestic sewage. The method includes burying reaction tanks underground in the depth of 0.5 m; and separating each operation period in each reaction tank into water intake for 6 hr while aerating, still depositing for 2 hr, decanting water and exhausting sludge for 2.5 hr, letting idle for 1.5 hr and water discharging successively. The present invention can raise the dispersed domestic sewage treating effect in cold area and is suitable for application in cold area.

Description

Technical field: [0001] The invention relates to a sewage treatment method. Background technique: [0002] In the domestic existing technology, most domestic sewage treatment adopts the biological treatment method, which uses the organic matter in the sewage metabolized by microorganisms as a nutrient source for its own growth and reproduction, so that the organic pollutants in the water can be removed. Microorganisms in sewage treatment plants mainly exist in the form of activated sludge and biofilm. Microorganisms with metabolic activity are the core of sewage biological treatment technology. At present, the activated sludge method is mainly used in domestic sewage treatment in the cold northern regions of my country, but these areas are located north of 40 degrees north latitude, the climate is very cold in winter, the freezing period lasts for 3 to 6 months, and the average water temperature of domestic sewage in winter is lower than 10°C. Moreover, the aeration treatmen...

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Problems solved by technology

[0003] In view of the problems that the domestic sewage treatment plants in the cold northern regions of China are running in winter, the number of microbial strains in the sewage treatment facilities is small and the treatment effect is poor, the purpose of the present invention is to provide a suspension packing lattice process for the treatment of dispersed low-temperature domestic sewage The method, the method is: a. bury the reaction tank 1 underground, and the upper end of the reaction tank 1 is 0.5m away from the ground surface; b. The process of controlling each operation cycle of the reaction tank 1 is as follows: water inflow for 6 hours, water inflow at the same time Carry out aeration, then statically settle for 2 hours, then decant water and discharge mud, the time for decanting water and mud discharge is 2.5 hours, and finally idle for 1.5 hours, and the water can be discharged; the reaction tank 1 is rectangular, and the aspect ratio is 1.5 to 4 , divided into two grids with a partition 2, that is, the first grid 1-1 and the last grid 1-2: the first grid 1-1 is a suspension filler reaction tank, and the volume of the first grid 1-1 accounts for 30% of the volume of the reaction tank 1~ 65%, the aspect ratio of the first grid 1-1 is 1-1.5, and the tank is filled with fillers; the last grid 1-2 is a traditional SBR reaction tank, and the volume of the last grid 1-2 accounts for 35% to 70% of the volume of the reaction tank 1 %, the aspect ratio of the last cell 1-2 is 1.5 to 3, and there is a mud discharge bucket 3 in the pool; 2 to 8 rectangular square holes 4 are connected between the two cells, and the square hole 4 is located at the bottom of the partition 2, The height of the square hole 4 is 20% to 30% of the effective water depth in the reaction tank 1, and the effective water depth is 4 to 6m. The width of the square hole 4 is 10% to 30% of the width of the reaction tank 1. Net 5

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