Original water biologic pretreatment method using suspended padding and apparatus therefor

Abstract

The water treating method utilizes biological contact and oxidation and sets suspension stuffing in water treater. Raw water is led into the water treater while its aerator is inflated for aeration with blower and its fluidizer fluidizes the biocarrier, the aerobic microbe in raw water is adsorbed onto the biocarrier. The fluidizer raises the oxygen transferring rate of raw water and the organic matter eliminating rate. Raw water is made to pass through suspension stuffing and the aerator before being led out. The present invention needs no stuffing rack and reverse flushing system and has long service life. The water level in the aerator tank may be self adjusted to raise water utilization.

Description

Technical field: [0001] The invention relates to a process for treating raw water, in particular to a process for treating raw water with a biological carrier, in particular to a method and device for biological pretreatment of raw water with suspended fillers. Background technique: [0002] With the continuous increase of the global population and the continuous development of society, fresh water resources are increasingly polluted, and the concentration of ammonia nitrogen and organic pollutants in water bodies is relatively high. On the one hand, ammonia nitrogen and organic pollution increase the amount of chlorination and alum addition in the water plant, resulting in an increase in the operating cost of the water plant. , usually use biological treatment methods to purify raw water, mainly using the following technologies: (1), ceramsite biological filter method: It has a good and stable removal effect on ammonia nitrogen; it also has a certain degree of organic pollu...

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Problems solved by technology

[0003] The technical problem to be solved by this invention is: because in the prior art, usually adopts biological treatment method, mainly adopts following technology: (1), ceramsite biofilter method: it is better to the removal effect of ammonia nitrogen, stable; To BODS And other organic pollutants and turbidity also have a certain removal rate, and can improve the properties of raw water, which is beneficial to subsequent treatment; however, due to the large area occupied by the ceramsite biofilter method, when the load is high, backflow equipment is required; at the same time, water distribution, distribution The piping and structure of air and recoil equipment are complex; moreover, the uniformity of water distribution and air distribution is very high, otherwise the mass transfer effect will be poor and the processing efficiency will decrease, and the filter material will be clogged in long-term operation, and it will be difficult to backwash sludge. (2) Suspension packing contact oxidation method: currently the most widely used in the field of water treatment, using elastic three-dimensional packing, its filaments are in a radial three-dimensional state, with certain flexibility and rigidity, and good resilience , the central rope is used to fix the elastic three-dimensional filler, and the air distribution is realized by setting the aeration device at the bottom of the aeration tank. However, the uniformity of water and air distribution is high, and it is easy to agglomerate. The actual specific surface area is small and the oxygen transfer coefficient is relatively low. High and easy to hang film, but the center rope has agglomeration phenomenon, the actual use specific surface area is low, generally only 20-30m2 / m3, the biomass is relatively small; and when the center rope is broken, etc., the replacement workload is heavy. Large, and the maintenance of the bottom aeration device is difficult. In addition, the water level of the existing treatment device is generally constant, and the water level cannot be adjusted flexibly with the change of the water level of the incoming water. If the raw water enters the treatment device by itself, it is difficult for the existing device Adapt to changes in incoming water levels

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