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Method for keeping bio-filter ecology under low nutrient medium condition

A biological filter and nutrient matrix technology, applied in the field of water treatment engineering, can solve the problem of lack of reference materials and engineering technology, and achieve the effect of ensuring the operation effect, reducing the load and reducing the cost.

Inactive Publication Date: 2008-11-12
BEIJING UNIV OF TECH
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Problems solved by technology

At present, there are no reference materials and reports on engineering technology related to this at home and abroad.

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  • Method for keeping bio-filter ecology under low nutrient medium condition
  • Method for keeping bio-filter ecology under low nutrient medium condition
  • Method for keeping bio-filter ecology under low nutrient medium condition

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Embodiment Construction

[0017] In the Beijing Key Laboratory of Water Quality Science and Water Environment Restoration Engineering, Beijing University of Technology, the biofilter was used to treat simulated groundwater containing iron and manganese, and the raw water contained Fe 2+ : 0.1~0.3mg / l, Mn 2+ : 1~1.5mg / l, TN≤6mg / l, TC≤45mg / l, treated water volume: 0.25m 3 / h. The quality of the raw water that is prepared belongs to a low nutrient matrix environment for the growth of microorganisms in the biofilter for iron and manganese removal, and cannot satisfy the normal physiological metabolism of microorganisms. The method of the present invention is used to return the backwash water and sediment of the biofilter to the The biofilter is used to supplement the nutrient matrix required for microbial growth. In the past four years of operation, the content of iron and manganese in the effluent is trace, which meets the national drinking water standard. The iron content is less than 0.1mg / l and the ma...

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Abstract

The invention relates to a method for maintaining the ecological stability of a biological filter under the condition of low nutrition substrate, which belongs to the water treatment engineering field. Currently, in the prior backflush process for treating a micropollution underground water source by utilizing a biological filter tank, yielding water often reflows to a sedimentation tank. The method comprises the following steps: according to the raw water quality, the change of the number of bacteria inside the sedimentation tank and the water quality of the backflush yielding water, the backflush yielding water in the sedimentation tank is collected and deposited in a backflush phase of a working period; supernatant fluid containing mass active bacteria and soluble nutrient elements reflow to the sedimentation tank; total or partial sediment containing soluble nutrient elements in an underlayer reflow to the sedimentation tank and is reutilized by mass microorganisms in the sedimentation tank, thereby replenishing the nutrient substrate needed for microorganism growth, proliferation and metabolism under the condition of the low nutrition substrate, and maintaining the ecological stability in the sedimentation tank. The method has simple operation and maintains the stability of a microorganism ecosystem inside the sedimentation tank under the condition of the low nutrition substrate.

Description

Technical field: [0001] The invention belongs to the field of water treatment engineering, and relates to a method for maintaining the ecological stability of microorganisms in a biofilter under the condition of low nutrient matrix. Background technique: [0002] The lack of water resources and water pollution have become one of the factors restricting my country's economic development. The "2006 China Environmental Status Bulletin" pointed out that in 2006, the overall water quality of the national surface water was moderately polluted. ) of the 745 surface water monitoring sections actually monitored, nearly 60% of the water quality fell below Class IV, and has completely lost its function as a drinking water source. The groundwater quality monitoring results of 163 cities show that the groundwater quality of the main monitoring points is below Good to poor. Under the current situation of serious shortage of water quality-based water resources, slightly polluted source wate...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02
CPCY02W10/10
Inventor 杨宏张杰段晓东朱晓辉贾运智熊晓丽杨佳丽宋立新
Owner BEIJING UNIV OF TECH
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