Device for semi-aerobic dry fermentation of sludge and feces mixture

Abstract

The invention discloses a device for semi-aerobic dry fermentation of sludge and feces mixture, which comprises a base with a slope, wherein an HDPE anti-seepage membrane is arranged on the base, a gas-permeable main pipe and gas-permeable branch pipes are arranged on the HDPE anti-seepage membrane, the gas-permeable branch pipes are perpendicularly connected on the two sides of the gas-permeable main pipe respectively, the gas-permeable main pipe and the gas-permeable branch pipes are all buried in cobblestones, compost fermentation raw materials are put on the cobblestones, sludge composting products which are formed by compost fermentation are arranged on the compost fermentation raw materials, and a water collection pit is formed below the slope of the base. The device adopts the gas-permeable pipes at the bottom to supply oxygen to reduce the blast aeration cost and save the electricity cost. The fermented products are put at the top of the device to biologically remove the odor from the bottom fermentation raw materials by virtue of microorganisms in the fermented products, resulting in odor removal. Besides, the device can utilize light to increase the dehydration speed, so as to achieve synchronization of fermentation and dehydration.

Description

technical field [0001] The invention relates to environmental sludge treatment, in particular to a quasi-aerobic drying and fermentation device for mixing sludge and feces. Background technique [0002] At present, with the development of industry and cities, the rate of urban sewage treatment is increasing day by day. The activated sludge method is the most widely used and mature technology in sewage treatment. About 90% of the sewage treatment plants in the world use this method as the core technology. . The biggest disadvantage of the activated sludge method is that a large amount of excess sludge is produced, the sludge has a high moisture content, difficult dehydration, and expensive treatment costs. The cost of sludge treatment and disposal accounts for 25% to 40% of the total operating cost of the sewage treatment plant, even as high as 60%. With the development of the economy, there are more and more urban sewage treatment plants, which generate a large amount of s...

AI Technical Summary

Problems solved by technology

With the development of the economy, there are more and more urban sewage treatment plants, which generate a large amount of sludge, which is difficult to dispose of and causes a huge processing burden

These sludges have high moisture content, landfill does not meet the requirements, and the calorific value of incineration is low. Fuel needs to be added, which is expensive and unbearable. If it is fermented, it will smell and have a great impact on the surrounding environment. Therefore, the present invention mainly aims at the shortcomings of the original fermentation device. , developed a quasi-aerobic compost drying bed to speed up the fermentation rate, increase the water removal rate, and improve the efficiency of organic fertilizers and reduce odors through the mixing of manure

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