Feasibility of methanolic wastes treatment containing chlorophenol in experimental UASB reactors i.e. R-I and R-II working side by side constantly for a couple of almost 32 weeks were studied. UASB reactor R-I was initiated by utilizing the digested sludge alone, whereas, the UASB reactor R-II was startedup by adding an activated carbon of an effective size 1.5-2.5mm to the digested sludge with the volume-volume ratio of 3:2. At low loading rates d” 0.5g-TOC/L-d for R-I and d” 2.6g-TOC/L-d for R-II, it was observed that the effect of HRT on the TOC reduction was not prominent, and in both the reactors the TOC reduction effectiveness was noticed to be above 80%. An optimum OLR to accomplish 80-85% TOC and chlorophenol reduction effectiveness (at HRT e” 12hours) was observed to be 2.6g-TOC/L-day and 10.8g-TOC/L-day for reactor R-I and R-II, respectively. It was also observed that to attain more than 80% TOC removal efficiency at a constant OLR of 6.5g-TOC/L-day and at a HRT of 18-20hours, the maximum influent chlorophenol concentration should stay below 21mg/L and 29mg/L for reactor R-I and R-II, respectively. The average VFAs effluent concentration observed was 357mg/L and 230mg/L for the reactor R-I and R-II, respectively. Comparatively the production of biogas in reactor R-II was less. The overall gas conversation rate observed at greater than 80% TOC removal efficiency for R-I and R-II was found to be 0.28L/g-CODremoved and 0.17L/g-CODremoved, respectively, with 60-62% of methane content for both the reactors. The results of this study suggested that the use of methanol as a medium to biodegrade chlorophenol in the presence of an activated carbon in a UASB reactor is an effective and feasible method at mesophilic temperature and neutral pH.
Arshad, A., Hashmi, H., Qureashi, I. (2011). Anaerobic Digestion of CHLOrphenolic Wastes. International Journal of Environmental Research, 5(1), 149-158. doi: 10.22059/ijer.2010.300
MLA
A. Arshad; H.N. Hashmi; I.A. Qureashi. "Anaerobic Digestion of CHLOrphenolic Wastes". International Journal of Environmental Research, 5, 1, 2011, 149-158. doi: 10.22059/ijer.2010.300
HARVARD
Arshad, A., Hashmi, H., Qureashi, I. (2011). 'Anaerobic Digestion of CHLOrphenolic Wastes', International Journal of Environmental Research, 5(1), pp. 149-158. doi: 10.22059/ijer.2010.300
VANCOUVER
Arshad, A., Hashmi, H., Qureashi, I. Anaerobic Digestion of CHLOrphenolic Wastes. International Journal of Environmental Research, 2011; 5(1): 149-158. doi: 10.22059/ijer.2010.300
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