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Material and method for repairing polluted water and bottom mud

A composite material and water body technology, applied in the field of bioremediation, can solve problems such as increasing treatment costs and water quality safety

Inactive Publication Date: 2012-09-19
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

Although these restoration methods can perform in-situ restoration of sewage and sediment, they need to add biological growth-promoting liquid, biological detoxification liquid, compound enzyme accelerator, etc., which not only increases the cost of treatment, but also has hidden dangers such as water quality safety.

Method used

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  • Material and method for repairing polluted water and bottom mud
  • Material and method for repairing polluted water and bottom mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Algae toxin-polluted water body and sediment remediation experiment

[0018] First, prepare the composite material loaded with algal toxin-degrading bacteria: soak 20 g of diatomite with 5% hydrochloric acid for 2 hours, wash with distilled water until neutral, then soak diatomite with 5% sodium hydroxide for 2 hours, wash with distilled water until neutral, wash until neutral Add diatomaceous earth to 500ml algal toxin-degrading dominant bacteria suspension, react in a water bath shaker at 30°C for 2h at a shaking speed of 100r / min, then let it stand for 10min, and pour it out after the sedimentation is complete Wash the precipitate three times with normal saline to elute the unadsorbed algal toxin-degrading dominant bacteria, and the density of microorganisms loaded on the prepared solid material is 4×10 6 pcs / g.

[0019] Then prepare the modified soil composite material loaded with algae toxin-degrading bacteria: adopt 5g Taihu Lake bank soil of 180 mesh ...

Embodiment 2

[0023] Example 2: Eutrophic water body and sediment restoration experiment

[0024] First prepare the composite material loaded with photosynthetic bacteria and nitrifying bacteria: soak 20g of clean soil along the Shiba Bay of Taihu Lake in Wuxi with 5% hydrochloric acid for 2 hours, wash with distilled water until neutral, then soak the soil with 5% sodium hydroxide for 2 hours, wash with distilled water until neutral Add neutral soil to 500ml bacterial suspension (mixed with 250ml photosynthetic bacteria suspension and 250ml nitrifying bacteria suspension), in water bath shaker, at 30℃, at 100r / min The shaking speed was reacted for 2 hours, and then stood still for 10 minutes. After the sedimentation was complete, the supernatant was poured out, and the sediment was washed three times with normal saline to elute the photosynthetic bacteria and nitrifying bacteria that were not firmly adsorbed. The prepared solid material was loaded with The microbial density is 3×10 9 pcs / ...

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PUM

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Abstract

The invention provides a material and a method for repairing polluted water and bottom mud. Specifically, nontoxic and innoxious solid particulates are adopted and are loaded with microbes according to a certain method before preparing a composite material; the composite material is used for in-situ flocculation or adsorption of pollutants in water, and transfers the pollutants to the bottom mud, so as to realize in-situ collection and concentration of the pollutants in water and fast degradation in the bottom mud; and after settling to the bottom mud, the composite material can also degrade pollutants in the bottom mud, so as to improve the water quality bottom matter environment. The invention can be applied to the comprehensive repairing of shallow water type lakes, slow flow river channels, small-sized reservoirs, wetlands and ponds which are eutrophicated or seriously polluted by organic substances.

Description

technical field [0001] The invention relates to a composite material and method for repairing polluted water body and bottom mud by using microorganisms. The invention belongs to the field of bioremediation of water pollution. Background technique [0002] In recent years, with the development of my country's economy, the problem of environmental pollution has become more and more serious, and water pollution is a prominent problem of environmental pollution in my country. A large amount of farmland runoff, industrial wastewater and domestic sewage are discharged into lakes and rivers, polluting water bodies Seriously, the water quality is extremely bad, and some rivers have even been completely degraded into Nashui Rivers, completely losing the self-purification ability of the water body, which turns black and smelly, seriously affecting the beautification of the city and people's lives. Small reservoirs, wetlands and ponds are also subject to industrial and agricultural po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F11/02C12N11/14
Inventor 潘纲尚媛媛代立春李宏
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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