Synchronous nitrogen and phosphorus removal process of integral bio-enhancement activated carbon dynamic membrane

Abstract

The invention relates to a synchronous nitrogen and phosphorus-removal domestic sewage treatment process of an integral bio-enhancement activated carbon dynamic membrane. The solid-liquid separation effluent process is completed by a dynamic membrane module. The domestic sewage treatment process comprises the following steps: pumping sewage into a bio-enhancement activated carbon dynamic membrane device, and carrying out biodegradation and removal on pollutants by utilizing a bio-enhancement activated carbon mixed liquor in the device; forming a dynamic membrane on the surface of the dynamic membrane module by the bio-enhancement activated carbon to carry out the solid-liquid separation of the mixed liquor; stirring raw water by a stirrer and sufficiently mixing the raw water with microorganisms in the reaction device of the bio-enhancement activated carbon dynamic membrane assembly, staying for a period of time and then filtering and discharging water through the dynamic membrane, wherein dissolved oxygen in the mixed liquor is provided by the aeration of an air blower. The invention has simple process and can realize a synchronous nitrification-denitrification nitrogen removal process and a nitrification phosphorus removal process; the structure of the adopted dynamic membrane assembly is stainless steel silk screen and the like, and therefore, the domestic sewage treatment process has low cost and simple control; and the domestic sewage treatment process can rapidly and effectively remove substances in the water, such as organic matter, SS (suspended substances), nitrogen, phosphorus and the like under the condition of low temperature; the hydraulic retention time is short, and thereby, the volume of reaction structures is effectively reduced.

Description

technical field [0001] The invention belongs to the technical fields of domestic sewage organic matter removal, bio-enhanced denitrification and denitrification dephosphorization, and specifically relates to an integrated bio-enhanced activated carbon dynamic membrane synchronous denitrification and dephosphorization process. Background technique [0002] The traditional biological denitrification theory holds that nitrification occurs under aerobic conditions, while denitrification is completed under anoxic or anaerobic conditions. The existing domestic sewage biological treatment process realizes the alternation of anaerobic, anoxic and aerobic reaction tanks in space and time through plug-flow reaction or division of the tank body, but the following shortcomings exist in actual operation: (1) In order to meet the requirements of nitrification , The normal progress of the denitrification process, sometimes additional alkali or organic carbon is required, which greatly incr...

AI Technical Summary

Problems solved by technology

The existing domestic sewage biological treatment process realizes the alternation of anaerobic, anoxic and aerobic reaction tanks in space and time through plug-flow reaction or division of the tank body, but the following shortcomings exist in actual operation: (1) In order to meet the requirements of nitrification , The normal progress of the denitrification process, sometimes additional alkali or organic carbon is required, which greatly increases the treatment cost

(2) The impact resistance of the process is weak, the value-added speed of nitrifying bacteria is slow and it is difficult to maintain a high biological concentration, resulting in a long total hydraulic retention time of the system, low organic load, and increased infrastructure investment and operating costs

(3) The system must maintain a high biological concentration and obtain a good denitrification effect, and the sludge backflow and digestive juice backflow must be carried out at the same time, which increases power consumption and operating costs

In view of the problems of activated sludge low aeration SND denitrification process such as long sludge age in the reactor, sludge bulking, low biological denitrification efficiency, long-term stable operation effect, etc., it is proposed to use biofilm method for synchronous nitrification Denitrification

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