Tandem-type removing method for oxidative pollutants in shallow groundwater
A groundwater, tandem technology, used in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. problem, to achieve the effect of low biomass yield, good treatment effect and low treatment cost
Active Publication Date: 2014-08-27
山东瑞密迪环保科技有限公司
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Problems solved by technology
[0004] The present invention aims at the problems of serious oxidative pollutant pollution in existing shallow groundwater, complex operation of conventional treatment technology, high cost and easy secondary pollution, and provides a simple and convenient operation, good treatment effect and no secondary pollution. Removal of Oxidative Pollutants in Shallow Groundwater in Series
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[0019] Such as figure 1 As shown, the method for removing oxidative pollutants in series shallow groundwater of the present invention is realized by constructing three series restoration areas of heterotrophic bioremediation area 1, joint restoration area 2 and plant ecological purification restoration area 3. Set up the first partition wall 4 between the heterotrophic biological restoration area 1 and the heterotrophic biological restoration area 1 and the joint restoration area 2, and set up the second partition wall 6 between the joint restoration area 2 and the plant ecological purification restoration area 3 A third partition wall 8 is set up between them. The bottoms of the first partition wall 4 , the second partition wall 6 and the third partition wall 8 are all reserved water holes. The heterotrophic bioremediation area 1 is divided into two parts, the front part and the rear part, through the first intermediate partition wall 5, and both parts are filled with filler...
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Abstract
The invention relates to a tandem-type removing method for oxidative pollutants in shallow groundwater. The method is implemented by constructing three tandem restoration zones comprising a heterotrophy restoration zone, a combined restoration zone and a plant ecological purification and restoration zone. Firstly, modified smashed cotton stem, which is utilized as a heterotrophy biological membrane carrier and a solid sustained-release carbon source, and the like are utilized to perform denitrification treatment to reduce nitrates and generate carbon dioxide at the same time, thus providing an inorganic carbon source for subsequent autotrophy denitrification. Packing balls and a nanometer iron-composite-packing mixed bed generate hydrogen. By utilizing the carbon source generated above, and utilizing the hydrogen as an electron donor and utilizing a fiber membrane as a biological membrane carrier, the hydrogen is utilized by microorganism on the biological membrane surface, the nitrates are reduced into nitrogen, and high-valence heavy metals in the groundwater are reduced by the hydrogen, thereby achieving an objective of water purification. The method has advantages comprising hydrogen autotrophy denitrification without need of providing additional hydrogen or carbon dioxide, the high utilization rate of hydrogen, good treatment effects, no secondary pollution, etc. over the prior art.
Description
technical field [0001] The invention relates to a method for removing oxidative pollutants in shallow groundwater and improving the water quality of shallow groundwater, belonging to the technical field of groundwater restoration. Background technique [0002] Groundwater is an important part of water resources, maintaining nearly 70% of China's population drinking water and 40% of farmland irrigation. Due to the application of chemical fertilizers, sewage irrigation, garbage and excrement, industrial wastewater discharge, etc., under natural conditions, the discharge is leached and decomposed by precipitation to form pollutants such as nitrate and heavy metal ions, which flow into rivers and lakes and seep into the ground, resulting in groundwater pollution. Oxidative pollutants such as nitrates and heavy metals. About half of China's urban areas have serious groundwater pollution, and the quality of groundwater is declining. About 70 million people in the country are stil...
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IPC IPC(8): C02F9/14
Inventor 张彦浩张志斌邹彦江孙翠珍王猛
Owner 山东瑞密迪环保科技有限公司