|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|4996698||1368272||2018||6 صفحه PDF||سفارش دهید||دانلود کنید|
- Effects of SRT on methane production were studied in a 65Â Â°C AD reactor.
- The optimum SRT was 6Â days with methane yield of 186.16Â mL/g VS.
- Long SRT enhanced the recalcitrant compounds release and worsen the methane yield.
- The main pathway for methane production was through syntrophic acetate oxidation.
In this study, a thermophilic (65Â Â°C) single-stage wasted activated sludge (WAS) digester was established and the effects of solid retention time (SRT) on the reactor performance were investigated. The result showed that the optimum SRT was 6Â days with methane yield of 186.16Â mL/g VS. It was found that SRT had little effect on the hydrolysis and volatile solids (VS) destruction, and the high temperature employed seemed sufficient to achieve maximum hydrolysis and VS destruction performance. Longer SRT, however, promoted the release of recalcitrant compounds and impaired acidification, leading to the low methane yield. The microbial community analysis revealed that the dominant pathway for methane production was through syntrophic activity of acetate oxidizing bacteria and hydrogenotrophic methanogens while acetoclastic methanogens were absent in the system.
Journal: Bioresource Technology - Volume 247, January 2018, Pages 724-729