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System and process for sludge in situ decrement enhanced by utilizing metazoan and application of process

A metazoan and in-situ technology, applied in biological sludge treatment, biological water/sewage treatment, sludge treatment, etc., can solve the problems of high water inflow and process conditions, difficult control of biological species, high energy consumption, etc. Achieve the effects of convenient management, easy automatic control, and low operating costs

Inactive Publication Date: 2012-03-14
浙江环科环境研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using physical and chemical methods to reduce weight requires large investment and high energy consumption; using biological predation to reduce weight, the biological species is difficult to control; using energy decoupling to reduce weight requires high requirements for water inflow and process conditions

Method used

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  • System and process for sludge in situ decrement enhanced by utilizing metazoan and application of process
  • System and process for sludge in situ decrement enhanced by utilizing metazoan and application of process

Examples

Experimental program
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Embodiment 1

[0023] The wastewater entering the process is printing and dyeing industrial wastewater, the water quality of printing and dyeing wastewater is pH: 9~11, CODcr: 750~1200mg / l, NH 3 -N: 15~30mg / l, TP: 2~6mg / l, water temperature is 35~40℃, water volume is 4000m 3 / d, the sewage treatment process is A / O+SBR, the residence time in the anoxic zone is 4 hours, and the residence time in the aerobic zone is 16 hours. The activated sludge method is used, and metazoans are added to the aerobic zone to strengthen predation. Under this condition , The sludge reduction effect is over 80%.

Embodiment 2

[0025] Domestic sewage from an urban sewage treatment plant, CODcr: 120~280mg / l, ammonia nitrogen: 20~30mg / l, TN: 30~40mg / l, TP: 2~5mg / l, SS: 100~300mg / l. Sewage adopts A 2 / O-Secondary settling tank process, stay in the anaerobic zone for 2 hours, stay in the anoxic zone for 3 hours, and stay in the aerobic zone for 10 hours; add metazoans in a certain proportion (0.1% to 0.3%) through the dosing tank. The aerobic pool has a sludge reduction effect of over 70%.

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Abstract

The invention discloses a system and a process for sludge in situ decrement enhanced by utilizing metazoan and application of the process. The system comprises an anaerobic zone, an anoxic zone, an oxic zone, a metazoan growing zone and a secondary sedimentation zone. A biochemical system can perform in situ decrement through arranging the metazoan growing zone in the sewage treatment process; and cultivated and domesticated metazoan is continuously added in the metazoan growing zone to enhance organism predation, thereby achieving the purpose of sludge in situ decrement and realizing sludge decrement effect of 50-80% of activated sludge. The process of activated sludge in situ decrement with an efficient biological method is suitable for any activated sludge methods and deformation technologies thereof, such as A<2> / O (anaerobic-anoxic / oxic), A / O (anoxic / oxic), SBR (sequencing batch reactor), MSBR (modified sequencing batch reactor), CASS (cyclic activated sludge System), oxidation ditch, MBR (membrane bio-reactor) and the like, can also be used for a biological treatment technology having a biological carrier, can be used for sludge decrement of a newly-built sewage treatment engineering and can also be used for transformation of a built engineering with extremely low transformation cost.

Description

technical field [0001] The invention relates to the technical fields of bioengineering and environmental engineering, in particular to an in-situ sludge reduction system utilizing metazoans and its technology and application. Background technique [0002] The amount of sludge produced by urban sewage treatment is large, the treatment cost is high, and secondary pollution is easy to occur. At present, the technology of sludge treatment and utilization has just started in my country, and less than one-tenth of the existing sewage treatment plants in the country are equipped with sludge treatment facilities. Sewage treatment plants in most cities have only completed the separation of water and solids, and have not treated sludge, let alone resource utilization. The sludge treatment method in many places is actually to dig a pit in the suburbs and bury it. Poured directly into the river. In recent years, secondary pollution incidents caused by sludge in various places have bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/02C02F3/12C02F3/00
CPCY02W10/10Y02W10/20
Inventor 沈浙萍梅荣武李明智吴康跃韦彦斐喻治平张刚王慧荣李欲如
Owner 浙江环科环境研究院有限公司
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