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Paper Information

Journal:   INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH (IJER)   WINTER 2011 , Volume 5 , Number 1; Page(s) 149 To 158.
 
Paper: 

Anaerobic Digestion Of Chlorphenolic Wastes

 
 
Author(s):  Arshad A.*, Hashmi H.N., Qureashi I.A.
 
* SCHOOL OF CIVIL ENGINEERING (MCE-NUST), RISALPUR CANTT, PAKISTAN
 
Abstract: 
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.
 
Keyword(s): UASB REACTOR, METHANOL, ACTIVATED CARBON, TOC, COD
 
 
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APA: Copy

ARSHAD, A., & HASHMI, H., & QUREASHI, I. (2011). ANAEROBIC DIGESTION OF CHLORPHENOLIC WASTES. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH (IJER), 5(1), 149-158. https://www.sid.ir/en/journal/ViewPaper.aspx?id=189161



Vancouver: Copy

ARSHAD A., HASHMI H.N., QUREASHI I.A.. ANAEROBIC DIGESTION OF CHLORPHENOLIC WASTES. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH (IJER). 2011 [cited 2022January25];5(1):149-158. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=189161



IEEE: Copy

ARSHAD, A., HASHMI, H., QUREASHI, I., 2011. ANAEROBIC DIGESTION OF CHLORPHENOLIC WASTES. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH (IJER), [online] 5(1), pp.149-158. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=189161.



 
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