Constructed wetland system for removing pathogenic microorganism in water

A technology of constructed wetland system and pathogenic microorganisms, applied in sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Reduce the risk of pathogenic microorganism contamination, good purification effect, and efficient removal effect

Inactive Publication Date: 2014-05-07
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research and application of constructed wetlands mainly focus on the removal of organic pollutants and nutrient salts in water bodies, but do not pay enough attention to the pollution control of pathogenic microorganisms
Relevant foreign studies have shown that the removal rate of pathogenic microorganisms in constructed wetland systems (single-stage wetlands) is about 65% to 92.6% (Vymazal et al., Removal of enteric bacteria in constructed treatment wetlands with emergent macrophytes: a review[J], J Environ Sci Health A Tox Hazard SubstEnviron Eng,2005,40(6-7):1355-1367), but different from conventional pollutants, when the concentration of pathogenic microorganisms in the influent is high, even if the removal rate is as high as 92.6%, the effluent The number of pathogenic microorganisms is still relatively large, which still constitutes a relatively large potential threat to human health

Method used

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  • Constructed wetland system for removing pathogenic microorganism in water
  • Constructed wetland system for removing pathogenic microorganism in water
  • Constructed wetland system for removing pathogenic microorganism in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] See figure 1 and figure 2 . The artificial wetland system used in the test, which can efficiently remove pathogenic microorganisms in water, is a container made of PVC board, with a size specification of 0.6mx0.5mx0.3m (length x width x height). Two PVC partitions are used in the container The constructed wetland bed is divided into 3 units, and the length of each unit is 0.2m. There is a waterway through which water flows between the first partition 2 and the bottom of the constructed wetland bed, the top of the second partition 2 is lower than the top of the first partition, and the bottom of the second partition is in contact with the artificial wetland bed. The bottom of the wetland bed is connected; a water inlet pipe 1 is arranged above the artificial wetland bed of the first unit separated by the first partition along the water inlet direction, and openings 4 are evenly opened on the water inlet pipe for distributing water (such as figure 2 shown), at the b...

Embodiment 2

[0037] The constructed wetland system used in the test, which can efficiently remove pathogenic microorganisms in water, is basically the same as in Example 1, except that the volume ratio of zeolite filled in the first unit: anthracite: steel slag: volcanic rock is 1:2:1: 1; the volcanic rock that is tiled and filled in the second unit: forsterite: the volume ratio of anthracite is 1:1:1; the zeolite that is tiled and filled in the third unit: the volume ratio of volcanic rock is 4:1.

[0038] Using the above-mentioned constructed wetland system capable of efficiently removing pathogenic microorganisms in water, a continuous operation test for the removal of pathogenic microorganisms was also carried out on the secondary biochemical effluent of the sewage plant in Example 1, and the results were the same as in Example 1.

[0039] The continuous operation test of the removal of organic pollutants and nitrogen and phosphorus nutrients in Example 1 was carried out simultaneously...

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Abstract

The invention relates to a constructed wetland system for removing pathogenic microorganism in water. According to the invention, 2 separator plates are used to divide the constructed wetland bed body into 3 units; the 3 units are paved and filled with composite fillers; the composite fillers filled in the first unit from a water inlet, from top to bottom, comprise zeolite, anthracite, steel slag and biological ceramsite; the composite fillers filled in the second unit from the water inlet, from top to bottom, comprise biological ceramsite, forsterite and anthracite; and composite fillers filled in the third unit from the water inlet end, from top to bottom, comprise zeolite and biological ceramsite. The inlet water fully contact with the composite fillers along the separator plates in a downward-upward-downward mode; and the system not only can effectively reduce the load of nitrogen and phosphorus into the river of secondary biochemical outlet water from sewage treatment plant, but also can effectively remove pathogenic microorganisms in the secondary biochemical outlet water of sewage treatment plant and reduce the risk of pathogenic organism pollution of receiving water.

Description

technical field [0001] The invention belongs to the field of water pollution control, in particular to an artificial wetland system capable of efficiently removing pathogenic microorganisms in water. Background technique [0002] With the rapid development of my country's urbanization process, urban water demand and sewage discharge are also increasing. For areas with water shortages, unconventional water sources have gradually become the main source of recharge for urban rivers. Taking the Wenyu River Basin in Beijing as an example, it is mainly supplied by non-conventional water sources such as urban receding water, upstream water, and scattered sewage in the basin. Investigation and Research on Microbial Pollution of Watershed [J]. Journal of Environmental Science, 2012,32(1):9-18). At present, the water quality evaluation of rivers in my country mainly considers conventional physical and chemical indicators, but studies using microorganisms as evaluation indicators hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCY02W10/10
Inventor 魏源送陈迪管策郑祥郁达伟王亚炜
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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