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Test and Study on PRB Technique Treating Polluted Groundwater

Author: ShiHongWei
Tutor: XuGuangQuan
School: Anhui University of Technology
Course: Environmental Engineering
Keywords: PRB Groundwater pollution Landfill leachate Zero-valent iron Sawdust
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 274
Quote: 2
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Abstract


Using grit, zero-valent iron, the test microorganism-rich soil, and sawdust mixture was stirred uniformly formed at different ratios as a medium made of a permeable reactive barrier (Permeble Reactive Barrier referred PRB) reactor, to Chase landfill generated 5-fold and 40-fold dilution of leachate from water samples simulated polluted groundwater, comprehensive treatment effect of the reactor were analyzed using orthogonal test as a research object. Derived through the analysis of the water quality of the effluent from the reactor influent concentration changes: increased levels of contaminants in the groundwater, the PRB effluent pH value increase will also increase, but the reactor effluent pH value or less; same reactor CODCr removal rate differences, the influent concentration is lower than half of the reactor effluent CODCr rise, not fall, but orthogonal test highest CODCr removal rate of more than 50%; BOD5 removal CODCr similar 9 # 1 orthogonal test reactor BOD5 removal of up to 93%, the second set of orthogonal tests the effluent BOD5 do not drop the anti-liter reactor majority, # 5 reactor BOD5 removal the highest rate, 56%; 2 orthogonal test turbidity removal at a high level, the turbidity removal efficiency of the reactor reached 80% to 90%; reactor influent concentration is low chroma removal generally good chroma removal of the reactor influent concentration, # 4, # 5, # 10, # 16 reactor 2 orthogonal test color removal rate of more than 70%. Therefore, with PRB handling by landfill leachate contamination of groundwater is feasible. Intuitive analysis we can see from the results of the orthogonal experiment, the influent concentration or different evaluation index, the best level results are different; calculated in accordance with the comprehensive evaluation index, the best medium ratio and reaction time of the first set of orthogonal experiment is: iron powder fineness The iron powder fineness of 100 mesh, and the amount of 20% iron powder, sawdust used in an amount of 20%, the reaction time is 5 days; ratio and the reaction time of the best medium of the second group of orthogonal test: 20% of 100 mesh iron powder dosage sawdust used in an amount of 0%, and the reaction time was 2 days. Based on the test results analyzed: water quality, media components of the reactor and the ratio and reaction time factors affecting PRB technology to deal with pollution of groundwater effects. And Chase dump Situation of Groundwater Pollution PRB technology designed the reaction cutoff wall of the treatment of landfill leachate contamination of groundwater, groundwater pollution prevention and control in the region to provide a decision-making program.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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