Anaerobic-aerobic alternative type granule sludge treatment sewage device and method

Abstract

The invention provides an anaerobic-aerobic alternative type granule sludge treatment sewage device and method and belongs to the sewage treatment technologies. According to the anaerobic-aerobic alternative type granule sludge treatment sewage device, a water inlet pipe and an air inlet pipe are arranged at the bottom part of a tank body; a water distributing pipe is arranged at the inner bottom part of the tank body and is connected with the water inlet pipe; a fine bubble aerator is arranged above the water distributing pipe and is connected with the air inlet pipe; an effluent weir is arranged on the outer side of the upper end of the tank body and is connected with the water inlet pipe through a return pipe; and the effluent weir is connected with an outlet sump through a water outlet pipe; a three-phase separating device is arranged at the top inside the tank body; a flow guide plate is arranged below the three-phase separating device in the tank body; and an air collecting pipe is arranged above the tank body and is connected with an exhaust port of the three-phase separating device. According to the anaerobic-aerobic alternative type granule sludge treatment sewage device, the sewage is alternately treated in anaerobic and aerobic manners under intermittent aeration. The anaerobic-aerobic alternative type granule sludge treatment sewage device has the advantages that the granule sludge is quickly generated, most of organic pollutants in the sewage are removed, and the biodegradability is improved, methane is generated and used as an energy; the resistance to impact load is high; the floor space is saved; the treatment efficiency is improved; and the treatment cost and expense are decreased.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to an anaerobic-aerobic alternate granular sludge treatment sewage device and a treatment method. Background technique [0002] With the acceleration of my country's urbanization process, the development of small and medium-sized towns is very rapid. At present, the sewage discharge of small and medium-sized towns accounts for more than 50% of the total sewage discharge in the country, but most of the 19,200 towns in the country do not have sewage treatment facilities. With the rapid development of small town construction in the next 50 years, the discharge of domestic sewage and industrial wastewater will increase several times, even ten times, which will inevitably aggravate the deterioration of the water environment. Since our country is a developing country with limited financial resources, the distribution of funds for infrastructure between large cities and small and medium-si...

AI Technical Summary

Problems solved by technology

However, anaerobic microorganisms grow slowly, sludge granulation takes a long time, and the effect of treating low-concentration wastewater is not good.

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