In-situ repairing system and method for composite polluted groundwater
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An in-situ remediation and groundwater technology, applied in the treatment of polluted groundwater/leachate, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problem of lack of simultaneous removal of multiple co-existing polluting components
Inactive Publication Date: 2015-12-09
CHINA UNIV OF GEOSCIENCES (WUHAN)
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[0005] One of the purposes of the present invention is to provide an in-situ remediation system for complex polluted groundwater, so as to solve the problem that the existing permeable reaction wall technology can only remove a single type of pollution component, but lacks the ability to remove multiple concurrent pollution components at the same time The problem
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Embodiment 1
[0104] This example adopts the integrated mobile simulation platform of groundwater pollution in a large-scale laboratory (that is, the in-situ remediation system for compound polluted groundwater in the present invention) to carry out the test, as figure 1 As shown, the length*width*height of the simulation device=2400*600*1200mm.
[0105] 1. In order to better carry out relevant research, firstly, prepare the microorganisms used in the test, including the cultivation, domestication, isolation, preservation and solidification of the strains. The method for the cultivation, domestication, separation and preservation of bacterial classification comprises the following steps:
[0106] a. Bacterial source: collect soil samples 5-10cm below the surface of the polluted area of large urban garbage sanitary landfills, and collect a total of 1500-2000g soil samples;
[0107] b. Microbial cultivation: 1200g of soil samples collected from different landfill leachate-contaminated area...
Embodiment 2
[0140] This embodiment is located in a large-scale garbage sanitary landfill site in a city where the groundwater is polluted by leachate. By investigating the scope and degree of groundwater pollution on the spot and the results of numerical simulation predictions, the on-site restoration test is carried out, as shown in Figure 7 shown.
[0141] One, the method operation steps of the cultivation, domestication, separation and preservation of bacterial classification are the same as embodiment 1.
[0142] 2. On-site repair test layout includes the following steps:
[0143] a. Detailed investigation of the research site: Conduct a detailed investigation of the research site to find out the stratum structure and lithology, groundwater flow field, and other relevant hydrogeological parameters, etc., and on this basis, find out the exact source, scope and degree of pollution of pollutants And water quality and pollution dynamic change characteristics, etc., to describe the pollu...
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Abstract
The invention provides an in-situ repairing system and method for composite polluted groundwater. According to the in-situ repairing system for the composite polluted groundwater, a permeable reaction wall is scientifically arranged to be of a two-section structure which comprises a first section of the system and a second section of the system, the first section of the system is filled with first section reaction materials and acid resistance anaerobes so that an acid anaerobic repairing environment can be formed by the first section of the system, and the second section of the system is filled with second section reaction materials. The second section of the system is divided into a front half part and a rear half part, the second section reaction materials of the front half part of the second section of the system are internally loaded with neutral aerobic microorganisms, and the second section reaction materials of the rear half part of the second section of the system are internally loaded with alkali-resisting aerobic microorganisms. According to the two-section type permeable reaction wall system, a pH value and DO regulating method is used for building repairing environments suitable for degrading of different pollutants in different spaces of the permeable reaction wall, so t hat the comprehensive processing effect of the repairing system is further optimized, and the purpose of repairing composite polluted groundwater is achieved.
Description
technical field [0001] The invention relates to a polluted groundwater remediation technology, in particular to an in-situ remediation system and a remediation method for compound polluted groundwater. Background technique [0002] Groundwater is an important water supply source for human society and an important part of maintaining ecological security. With the continuous increase of modern population, the rapid development of industrialization and urbanization, and unscientific agricultural planting, human society produces a large amount of waste every day, which contains a large amount of refractory or non-biodegradable organic matter, heavy metals, etc. Pollution components, these pollution components can enter the groundwater environment through different paths, resulting in a complex pollution situation in groundwater. Pollutants rich in various types and high concentrations of pollutants such as landfill leachate have become an important source of complex polluted gr...
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