Percolate and kitchen wastewater MBR system and process thereof

Abstract

The invention discloses a percolate and kitchen wastewater MBR system and a process thereof, the percolate and kitchen wastewater MBR system comprises a water production system, a backwashing system and an aeration system, the water production system comprises a membrane box, a membrane pool, a membrane cleaning water pool, a water production tank, an electric hoist and a cleaning device. According to the invention, the combination mode of the biochemical system and the membrane system is optimally designed, so that the MBR process is more integrated; the curtain type membrane is directly arranged in the biochemical aeration tank, the aeration system not only performs oxygenation aeration on the biochemical tank, but also performs disturbance aeration on curtain type membrane filaments, and meanwhile, the surface of the curtain type membrane is self-cleaned and dredged by utilizing the action of transverse water flow, so that the equipment investment and the operation energy consumption are saved.

Description

technical field [0001] The invention relates to the field of landfill leachate and kitchen waste wastewater treatment, in particular to an MBR system and process for leachate and kitchen waste water. Background technique [0002] With the development of cities and towns, my country has vigorously promoted the field of domestic waste management, and the number of waste classification and combined waste incineration collaborative processing projects is increasing; and in the process of domestic waste treatment, especially organic waste is produced in the process of sorting, pressing, fermentation and other links A large amount of wastewater such as leachate, filter press, fermentation broth, etc., is difficult to treat and has high operating costs due to high organic concentration, high oil content, high salt content, and various impurities. [0003] The leachate treatment process of conventional domestic waste incineration power generation projects is: pretreatment + anaerobic...

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Problems solved by technology

[0002] With the development of cities and towns, my country has vigorously promoted the field of domestic waste management, and the number of waste classification and combined waste incineration collaborative processing projects is increasing; and in the process of domestic waste treatment, especially organic waste is produced in the process of sorting, pressing, fermentation and other links A large amount of waste water such as leachate, press filter liquid, fermentation liquid, etc., is difficult to treat due to high organic concentration, high oil content, high salt content, and various impurities at the same time, and the operation cost is high

[0003] The leachate treatment process of conventional domestic waste incineration power generation projects is: pretreatment + anaerobic + AOMBR + membrane advanced treatment process, which has been gradually recognized by the market in recent years; In projects such as kitchen waste, fruits and vegetables, a large amount of organic waste press filtrate or fermentation liquid wastewater with high oil content and many fine impurities needs to be co-processed by the leachate treatment station of the original waste incineration power plant. There are similarities and differences in the properties of the filtrates, and there are some mismatches in the simple direct mixing process

[0004] The biochemical MBR of the leachate treatment project of the traditional domestic waste incineration project mostly adopts tubular ultrafiltration membranes, and the tubular ultrafiltration membranes mainly use 8mm or 5mm membrane channels, and the high flow rate cross-flow technology is used to prevent membrane clogging; The following disadvantages: high frequency of membrane clogging, large operating energy consumption, high investment in supporting equipment

[0005] In the treatment of high-concentration organic wastewater such as landfill leachate, kitchen waste, fruit and vegetable waste, especially kitchen waste, kitchen waste press filter wastewater and biogas slurry wastewater contain high oil and short fibers, which can provide normal biochemical + membrane filtration The combined process has brought great troubles; short fibers are enriched in wastewater, and the current mainstream tubular ultrafiltration membranes are difficult to adapt to, often causing membrane pore clogging, increased cleaning frequency, and increased stress on the membrane filter layer during the dredging process. Destruction, the service life of the membrane is seriously reduced, which in turn affects the production capacity and utilization efficiency

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