Suspended ceramic biological aerated pool and method for treating raw water by applying suspended ceramsite biological aerated pool

Abstract

The invention discloses a suspended ceramic biological aerated pool and a method for treating raw water by applying the suspended ceramsite biological aerated pool. A water and gas distribution area, a lower filtering plate, a suspended ceramisite filler material layer, an upper filter screen and a water outlet area are sequentially arranged in a pool body of an up-flow aerated filtering pool from bottom to top, and the water outlet area and a water outlet channel are connected; a plurality of filtering heads are evenly distributed on the lower filtering plate and penetrate through the lower filtering plate; ceramsites of the suspended ceramisite filler material layer can be prepared by adopting shale as a raw material, crushing through a crusher, drying, pulverizing through a ball mill, pelletizing through a turnplate pelletizer and sintering in a rotary kiln at high temperature of 1100-1300 DEG C, wherein the sintering time lasts for 20+ / -2min, and the apparent density is 0.75-0.95g / cm<3>. When being used for biologically pretreating a micro-polluted water source, the method can be used for nitrifying ammonia nitrogen, removing iron and manganese, pre-oxidizing for coagulation enhancement and removing taste and odor; and when being used for various sewage biochemical treatments, not only is the organic matter degradation efficiency high, but also the backflow can be enhanced conditionally, the nitrogen removal and impact load resistance capabilities can be greatly improved.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a suspended ceramsite aerated biological filter and a method for applying the same to biochemically treat biochemical wastewater or pretreat slightly polluted raw water. Background technique [0002] Biological aerated filter is a sewage treatment technology developed in the late 1980s. This technology uses fillers with high specific surface area as biofilm carriers. It integrates biochemical treatment and filtration functions, has high treatment efficiency, and occupies a small area. Both at home and abroad have been promoted and applied. In recent years, due to the increasingly serious organic pollution of urban drinking water sources, it is urgent to introduce biological pretreatment technology into the conventional "coagulation-sedimentation-sand filtration-disinfection" urban water supply treatment process, and the use of biological aerated filter pretreatment process is also ...

AI Technical Summary

Problems solved by technology

In the biological pretreatment process of water supply, the degree of pollution of raw water often changes seasonally. In some periods of time, the pollution of raw water is slight, and the dissolved oxygen in the water is sufficient, so oxygen supply is not needed. However, in order to maintain the fluidized state of plastic suspended filler, a larger Otherwise, the suspended filler either floats on the water surface or sinks to the bottom of the pool, and cannot fully mix and contact with the water flow, so the operation consumes a lot of energy.

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