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OCO activated sludge improvement process and device for strengthening municipal wastewater treatment

A technology for activated sludge and urban sewage, applied in multi-stage water/sewage treatment, biological water/sewage treatment, special compound water treatment, etc., can solve the toxic and side effects of denitrification system, insufficient denitrification carbon source, and affect the quality of effluent water To achieve the effect of improving sludge settling performance, optimizing effluent water quality, and increasing sludge cracking rate

Active Publication Date: 2018-05-18
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology

[0006] The sludge production and instability are mainly due to the large amount of organic matter in the sludge floc; coupled with the lack of denitrification carbon source, the additional carbon source is not only expensive, but also blindly added may have toxic side effects on the entire denitrification system , affecting the water quality of the effluent

Method used

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  • OCO activated sludge improvement process and device for strengthening municipal wastewater treatment

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Embodiment 1

[0048] Taking the influent water quality of the secondary treatment system of an urban sewage treatment plant as the research object, the sludge floc concentration is about 3000mg / L, the operating temperature is normal temperature, the influent water quality is COD=355mg / L, BOD 5 =170mg / L, NH 3 -N=38mg / L, TN=48mg / L, TP=15mg / L, SS=80mg / L. After the remaining sludge passes through the bypass ultrasonic-swirl carbon release system, the sludge flocs are broken into small floc structures, and the refractory reticular impurities on the surface of the floc sludge are removed, and the COD of the sludge supernatant Organic matter such as organic matter, polysaccharide and protein concentration increased by 50% to 200%, which greatly supplemented the carbon source concentration and achieved sludge reduction. The measurement results of the Malvern laser particle size analyzer (Beckman Coulter LS 230) show that the particle size distribution of the sludge after cyclone break-up and ultra...

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Abstract

The invention relates to the technical fields of domestic wastewater treatment and sludge treatment and specifically discloses an OCO activated sludge improvement process for municipal wastewater. Twoparts including an OCO wastewater treatment system and a backflow bypass sludge carbon release system are provided in the process. The OCO wastewater treatment system is composed of a grating, a primary sedimentation tank, an OCO biochemical tank and a secondary sedimentation tank; and the backflow bypass sludge carbon release system is composed of a sludge concentration tank, an ultrasonic treatment device and a swirl breaker. A backflow bypass ultrasonic-swirl carbon release system is embedded on the basis of a traditional OCO wastewater treatment process / method to achieve the aims of strengthening the biochemical efficiency of the OCO biochemical tank by virtue of a strong swirl shear field, a centrifugal field and an ultrasonic cavitation effect, improving the biological nitrogen andphosphorus removal effect and reducing the sludge, so that the aim of recycling a carbon source in sludge is achieved, and furthermore, the biochemical efficiency and sludge reduction effect are improved, and the wastewater and sludge treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical field of urban domestic wastewater treatment and sludge disposal, in particular to an OCO activated sludge improvement process and device for strengthening urban sewage treatment. Background technique [0002] The OCO process is an activated sludge treatment system combining anaerobic-anoxic-aerobic. With its unique pool structure and equipment configuration, the anoxic zone and aerobic zone in the biochemical pool can be relatively separated, and the contradiction of backflow in the mixed solution can be solved skillfully. Because of its compact structure, small footprint, low investment cost, easy operation and stable effluent quality, it is widely used in small and medium flow production sewage and urban sewage of industrial enterprises in my country. [0003] With the acceleration of urbanization and industrialization in my country, the production and treatment of industrial wastewater and domestic sewage a...

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Application Information

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IPC IPC(8): C02F9/14C02F11/00C02F11/12C02F101/30
CPCC02F1/001C02F3/301C02F3/308C02F9/00C02F11/00C02F11/12C02F2001/007C02F2101/30C02F2305/06
Inventor 徐银香王勇曾涛胡光忠柳忠彬刘少北刘明谢君科
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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