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Microbial treatment method for river sediment

A river sediment and treatment method technology, applied in the field of microorganisms, can solve the problems of secondary pollution of chemical reagents, accumulation of pollutants, release of pollutants, etc., and achieve the effects of environmental protection, improvement of nutrients, and elimination of odor

Pending Publication Date: 2019-08-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are some problems in these methods. Simple dredging cannot solve the problem. Pollutants will continue to accumulate with the water quality. At the same time, the disposal of sludge from dredging is even more problematic. At present, there have been many cases of sludge dumping causing environmental damage.
Chemical immobilization can temporarily lock the infiltration of pollutants, but there is always a risk of pollutants being released, and the addition of chemical reagents will cause secondary pollution

Method used

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  • Microbial treatment method for river sediment

Examples

Experimental program
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Effect test

Embodiment 1

[0009] see figure 1 , a certain river in Jiaxing, dredging through the river, taking 10 tons of sludge, first pumping the sludge into a solid fermentation tank (model BIO10000L, manufacturer Jiangsu Zhenjiang Gerui Biological Technology Co., Ltd.), adding 10% mass volume fraction of soybean meal , 1% mass volume fraction of molasses, and 10% mass volume fraction of microbial bacterial liquid, the bacterial strains of the microbial bacterial liquid referred to are composed of photosynthetic bacteria: Bacillus: lactic acid bacteria = 1:2:2, and the number of bacteria is 1*10 8 Above, by stirring at 50rpm, controlling the temperature at 25°C, and stirring for solid fermentation for 18 hours. The black odor basically disappears, and then the fermented sludge is pumped from the discharge port at the bottom of the solid fermentation tank to a 0.3MPA plate and frame filter press for pressure filtration to produce a mud cake with a water content of 60%, and about 500 kg of The mud ca...

Embodiment 2

[0011] see figure 1 , a certain river in Zhoushan, close to the aquatic product wharf, is seriously polluted and belongs to the black and smelly river. Through river dredging, the amount of sludge taken is 10 tons, and the sludge is first pumped out to a solid fermentation tank (model BIO10000L, manufacturer Jiangsu Zhenjiang Gerui Biological Technology Co., Ltd.), adding 20% ​​mass fraction of soybean meal, 5% mass fraction of molasses Volume fraction, and 10% mass volume fraction of microbial bacterial liquid, refers to the composition of microbial bacterial liquid strains as photosynthetic bacteria: bacillus: lactic acid bacteria = 1:2:2, the number of strains is 1*10 8 Above, by stirring at 120rpm, controlling the temperature at 30°C, and stirring for solid fermentation for 48 hours. The black odor has basically disappeared, and then the fermented sludge is pumped from the outlet at the bottom of the solid fermentation tank to a 0.6MPA plate and frame filter press for pre...

Embodiment 3

[0013] see figure 1 , a certain river in Hangzhou, dredged through the river, took 5 tons of sludge, first pumped out the sludge into a solid fermentation tank (model BIO10000L, manufacturer Jiangsu Zhenjiang Gerui Biological Technology Co., Ltd.), and added 15% mass volume fraction of soybean meal , 3% mass volume fraction of molasses, and 10% mass volume fraction of microbial bacterial liquid, the bacterial species of the microbial bacterial liquid referred to consists of photosynthetic bacteria: Bacillus: lactic acid bacteria = 1:2:2, and the number of bacteria is 1*10 8 Above, by stirring at 80rpm, controlling the temperature at 28°C, and stirring the solid fermentation for 36 hours. The black odor has basically disappeared, and then the fermented sludge is pumped from the outlet at the bottom of the solid fermentation tank to a 0.5MPA plate and frame filter press for pressure filtration to produce a mud cake with a water content of 75%, and about 650 kg of The mud cake i...

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Abstract

The invention provides a microbial treatment method for river sediment. The method comprises the following steps: the sediment is pumped out by using a physical dredging method, a microbial agent is used, solid fermentation is performed to eliminate odor of the sediment and simultaneously improve nutrient substances of the sediment, and finally the sediment is recycled into a raw material of nutrient soil and an organic fertilizer. According to the method provided by the invention, the solid fermentation system is utilized, the environmental conditions are controlled, so that the microbial agent can digest organic matter in the sediment to remove the black odor of the sediment, and the sediment is turned into the utilizable nutrient soil and organic fertilizer through fermentation; the method has the advantages of environmental protection, low costs and resource utilization of waste, solves the problem of disposal of the sediment, and utilizes resources, thereby generating economic value; and the method is a sludge disposal method worthy to be promoted.

Description

technical field [0001] The invention belongs to the field of microorganisms, and relates to a method for comprehensive treatment of river channel bottom mud by microorganisms, in particular to a treatment method for microbial river bottom mud. Background technique [0002] In recent years, with the rapid development of society, the organic matter and eutrophication of urban rivers have increased, resulting in a large amount of river bottom sludge. Sludge deposits contain a large amount of pollutants, releasing organic matter and heavy metals that are difficult to degrade. In summer and other seasons with high temperature, it is easy to cause sludge to float and black odor. If the bottom mud is not treated, it will affect the ecology of the river and endanger the health of residents on both sides of the river. The current disposal methods are roughly as follows, one is to use a high-pressure pump to pump the sludge into the car to transport it away by dredging, one is to so...

Claims

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Application Information

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IPC IPC(8): C02F11/04C02F11/122C02F11/00
CPCC02F11/008C02F11/04C02F11/122C02F2103/007
Inventor 徐礼根郑刚
Owner ZHEJIANG UNIV
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