Method for entrapping and inactivating aquatic organisms in biological activated carbon filter (BACF)

Abstract

The invention discloses a method for entrapping and inactivating aquatic organisms in a biological activated carbon filter (BACF). The method is realized in the following way: a quartz sand underlayer and a disinfectant mixing feeding system are additionally arranged on the foundation of the BACF; the quartz sand underlayer is positioned under an active carbon layer and is used for entrapping the aquatic organisms; perforated water collection branches and perforated water distributing branches, which are in the disinfectant mixing feeding system, are positioned on the interface of the active carbon and the quartz sand, and are used for collecting part of the water filtered by the active carbon, and preparing and feeding the disinfectant; and the water flow, which is downwardly filtered by the BACF, is used for inactivating the aquatic organisms entrapped in the quartz sand underlayer. The inactivating process is completed in the quartz sand underlayer, and the feeding of the disinfectant does not influence the functions of adsorption and biodegradation of the BACF, thereby ensuring that the inactivating operation does not change the conditions for the filter operation of the BACF. In addition, the capillary water flow force characteristic of the filtered water flow is utilized to accelerate the mass transport process from liquid phase to aquatic organism wall, thereby enhancing the contact inactivating effect and saving the feeding amount of the disinfectant.

Description

Technical field [0001] The invention belongs to aquatic organisms treatment technology, and relates to a biological activated carbon filter aquatic organisms interception and inactivation method, which is used to inactivate aquatic organisms appearing in a water purification process, and is particularly suitable for inactivating a large number of rotifers breeding in the biological activated carbon filter , Cyclops, Chironomid larvae, Fairies and nematodes and other aquatic organisms. Background technique [0002] Water supply companies are faced with the double pressure of increased water source pollution and the increase in water quality standards. In order to effectively cope with the above pressure, ozone-biological activated carbon filter technology (O 3 -BAC) the core deep processing technology has been widely used. O 3 -BAC process water treatment technology, as a deep purification process, was first developed by the former Federal Water Supply Company of Bremen, Germany i...

AI Technical Summary

Problems solved by technology

In order to effectively control the risk of aquatic biological pollution in the biological activated carbon filter and prevent it from penetrating the biological activated carbon filter into the water supply network, foreign water plants generally strengthen the operation and management of the biological activated carbon filter during the period of high pollution, such as shortening the filtration cycle, Reduce the filtration rate and strengthen backwashing, etc., but the control effect is not obvious; China has tried methods such as chlorine backwashing, dry pool, ammonia and salt soaking, but there are problems such as seriously affecting the normal operation of the biological activated carbon filter and high treatment costs.

Although liquid chlorine, chlorine dioxide and other water purification disinfectants have significant inactivation effects on aquatic organisms, they are directly used to inactivate aquatic organisms in biological activated carbon filters. When killing aquatic organisms, they will also kill aquatic organisms in biological activated carbon filters The functional microorganisms reduce the biomass and biological activity of the biofilm on the surface of the filter material, and seriously affect the normal biosorption and degradation functions of the biological activated carbon filter.

At the same time, the disinfectant will also destroy the pore structure of activated carbon, reduce its adsorption performance and shorten its service life

According to the applicant's data retrieval, so far, no treatment method has been found that can effectively inactivate the aquatic organisms in the biological activated carbon filter without affecting the normal operation of the biological activated carbon filter.

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