کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10236427 | 45144 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Co-digestion of industrial sludge with municipal solid wastes in anaerobic simulated landfilling reactors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
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![عکس صفحه اول مقاله: Co-digestion of industrial sludge with municipal solid wastes in anaerobic simulated landfilling reactors Co-digestion of industrial sludge with municipal solid wastes in anaerobic simulated landfilling reactors](/preview/png/10236427.png)
چکیده انگلیسی
The effects co-disposal of industrial sludge with the organic fraction of municipal solid wastes (OFMSW) on the anaerobic treatment of domestic solid waste and the leachate characteristics were investigated in three simulated landfilling anaerobic bioreactors. All of the reactors were operated with leachate recirculation. One of these was loaded only with OFMSW (control reactor); the second reactor was loaded with industrial sludge and OFMSW, the weight ratio of the OFMSW to industrial sludge was 1:1 (dry solid basis) (run 1); the third reactor was loaded with industrial sludge and OFMSW, the weight ratio of the OFMSW to industrial sludge was 1:2 (dry solid basis) (run 2) in order to compare the effects of co-disposal of industrial sludge with the solid wastes. The leachate recirculation rate was 300Â ml/day in all of the reactors. pH, chemical oxygen demand (COD), volatile fatty acids (VFA), ammonium-nitrogen (NH4-N) concentrations in leachate samples; total and methane gas productions in simulated anaerobic reactors were regularly monitored. After 98 days of anaerobic incubation, it was observed that the pH, COD, VFA concentrations in the leachate samples of the industrial sludge-added reactors (especially run 2) were better than in the control reactor. The COD values were measured as 7128, 5714 and 4205Â mg/l while the VFA concentrations were 1605, 1310 and 576Â mg/l, respectively, in the leachate samples of the control, runs 1 and 2 reactors after 98 days of anaerobic incubation. Although the control has a high initial BOD5 concentration, the highest BOD5 decrease occurred in this reactor. The addition of industrial sludge did not significantly retard the decreases in BOD5 concentrations. The TN, TP and NH4-N reduction in the control reactor are the highest level. The TN, TP and NH4-N concentrations in MSW reduced to 614, 314 and 121 from 10Â 900, 2300 and 500Â mg/kg in control reactor by day 98. The values of pH were 6.31, 7.16 and 7.25, respectively, after anaerobic incubation, respectively in the control, runs 1 and 2 reactors. Industrial sludge addition decreased the methane percentage in the anaerobic simulated reactor. The methane percentage of the control, runs 1 and 2 reactors were 31%, 20% and 12%, respectively, after 98 days of incubation. In addition, at the end of the anaerobic toxicity assay (ATA) test, there is significant toxicity in industrial sludge-added reactors (especially run 2) under anaerobic conditions since decreases in methane gas productions was observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Biochemistry - Volume 40, Issue 5, April 2005, Pages 1871-1879
Journal: Process Biochemistry - Volume 40, Issue 5, April 2005, Pages 1871-1879
نویسندگان
Osman Nuri AÄdaÄ, Delia Teresa Sponza,