Excess sludge reduction bioreactor with variable aeration and worm attachment oblique plate

Abstract

The invention discloses an excess sludge reduction bioreactor with variable aeration and a worm attachment oblique plate, which relates to a bioreactor for excess sludge reduction. The bioreactor solves the problems that that the conventional excess sludge reduction device has low oxygen utilization rate, poor aeration adjustment, easy worm drop, low growth density of worm colony, difficult discharge of inert substances and the like. An automatic gas flow adjustor which is well arranged can automatically adjust the air flow entering a plurality of variable micropore aeration pipes according to the dissolved oxygen concentration of sludge mixed solution in a container, thereby realizing variable aeration for the sludge mixed solution in the container; the dissolved oxygen concentration of the sludge mixed solution can be kept at the maximum dissolved oxygen concentration of the worm sludge reduction through the variable aeration; and a plurality of variable aperture vent holes are uniformly distributed on the variable micropore aeration pipes, and the variable range of the diameters of the vent holes is 0.2 to 0.8 millimeter. The excess sludge reduction bioreactor integrates the worm attachment oblique plate and the variable aeration so as to greatly improve the sludge reduction effect, and the sludge reduction reaches over 90 percent.

Description

technical field [0001] The invention relates to a bioreactor for reducing excess sludge, which belongs to the technical field of treating excess sludge with biological technology. Background technique [0002] At present, more than 80% of the sewage treatment plants in the world use the activated sludge method to treat domestic sewage, but it has always had a big disadvantage, that is, a large amount of excess sludge will be generated during sewage treatment. The amount of residual sludge produced by the sewage treatment plant is about 0.5% to 1% of the volume of the treated water, which is a huge amount. Excess sludge also contains a large amount of organic matter, various bacteria, viruses and parasites, and may concentrate heavy metal inorganic compounds such as zinc, copper, lead and cadmium, as well as toxic organic compounds. Improper treatment will cause serious environmental pollution problems. With the development of sewage treatment, the total water volume and tre...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bioreactor for excess sludge reduction with variable aeration and worm-attached sloping plates to solve the low oxygen utilization rate existing in existing excess sludge reduction devices, and the aeration can be adjusted Poor performance, which is not conducive to the feeding of worms on the remaining sludge, worms are easy to fall off, the growth density of worm populations is low, the effect of sludge reduction is poor, and it is not conducive to the discharge of inert substances, etc.

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