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Method for purifying water of river and channel by biological grid

A technology of biological fences and ditches, applied in chemical instruments and methods, biological water/sewage treatment, sustainable biological treatment, etc., can solve problems such as unseen applications, and achieve the effects of less engineering investment, land saving, and low cost

Inactive Publication Date: 2007-01-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the biological contact oxidation process is used in micro-polluted source water (Ding Yuanhong, Hong Huasheng, Xiong Xiaojing, Tao Yousheng. Biological contact oxidation pretreatment of micro-polluted source water. Water Treatment Technology, 2002, 28 (3); Geng Tusuo, Wang Zhansheng. Biological contact oxidation treatment Experimental Research on Micro-Polluted Surface Water. Urban Environment and Urban Ecology, 2000, 13(4)), Domestic Sewage (Du Maoan, Qiu Liping, Feng Qi, Nakamura Genmasa. Experimental Research on Bio-contact Oxidation Filtration Treatment of Domestic Sewage. Harbin Architecture University Journal, 2001, 34(4); Meng Lingchun, Sun Qimei. Biological contact oxidation treatment of domestic sewage. Industrial water treatment, 2000, 20(11)) and industrial wastewater have a wide range of applications, but in-situ utilization of polluted water No application of existing microbial water purification methods

Method used

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  • Method for purifying water of river and channel by biological grid
  • Method for purifying water of river and channel by biological grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the middle of the narrower (less than 10 meters, the same below) polluted river course (ditch) with water quality higher than Class IV (according to GB3838-2002 surface water environmental quality standard), a bio-barrier of braided packing 2 (belonging to soft packing) is established, The filler is wound on the ladder-shaped metal support 1, and a grid is set in front of the bio-screen to intercept large impurities. The water quality of the river water passing through the bio-barrier is purified, COD is reduced by 30%, and N and P are reduced by 15-25%.

Embodiment 2

[0022] In the middle of the river channel (ditch) with water quality of Class IV (according to GB3838-2002 surface water environmental quality standard), a biological barrier with shield filler 1 is established. The filler surrounds the columnar plastic support 2, and the biological barrier is planted sporadically 5 at a depth of one meter. After 1-3 months of film formation, the water quality of the river water passing through the bio-barrier is purified by adsorption and contact oxidation, COD is reduced by 50%, and N and P are reduced by 15-30%.

Embodiment 3

[0024] In the middle of the narrow river course (ditch) with water quality of Class V or worse than Class V (according to GB3838-2002 surface water environmental quality standard), a bio-fence with threaded elastic filler 1 is established, the filler is placed in the fence-type cement support 2, and an aeration device is installed Before the bio-barrier, a grille is set to intercept large impurities. Both the bio-barrier and the grille are placed in interception type 3. After 1 to 3 months of film formation, the water quality of the river water passing through the bio-barrier is purified through adsorption and contact oxidation. COD is reduced by 70%, and N and P are reduced by 20-40%.

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Abstract

A process for purifying the water in river or ditch by biologic grate features that said biologic grate arranged in river or ditch is composed of several biologic grate units and each biologic grate unit consists of supporting frame, filler in said supporting frame, and biomembrane growing on said filler.

Description

1. Technical field [0001] The invention relates to a method for purifying the water body of a river course or ditch, in particular to a method for establishing a bio-barrier in a river course or a ditch so as to purify the water body through the action of the bio-barrier. 2. Background technology [0002] my country is a country with many lakes. With the rapid development of modern economy, the progress of agricultural technology, the urban sewage discharge and population increase, the factors that pollute lake water are increasing, and a large number of nutrients (such as nitrogen, phosphorus, etc.) Continuously flowing into the lake, the eutrophication of the lake is becoming more and more serious. According to the survey data of more than 130 lakes in the country, high nutrient lakes accounted for 43.5% of the total number of investigations, and medium nutrient lakes accounted for 45% of the total number of investigations (State Environmental Protection Administration. 199...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 任洪强夏青高湘谢志峰
Owner NANJING UNIV