|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|4996696||1368272||2018||5 صفحه PDF||سفارش دهید||دانلود کنید|
- Hydrolysis and acidogenesis of food waste (FW) in leach bed (LB) reactor.
- Addition of neutralizing agent accelerated the acidogenesis of FW.
- Lactic acid dominated in the leachate from LB in batch feeding mode.
- Organic acid shifted to acetic and butyric acid for LB in semi-continuous feeding mode.
Lactate accumulation occurs frequently during the hydrolysis and acidogenesis of food waste and produces an unfavorable substrate for anaerobic digestion. The objective of the present study was to reduce lactic acid production during the hydrolysis and acidogenesis of food waste in leachate bed reactor for establishment of the two-phase anaerobic digestion system. The results showed that the hydrolysis and acidogenesis of food waste in batch feeding mode underwent two consecutive stages, namely lactic acid fermentation and mixed acid fermentation. In the lactic acid fermentation stage, lactate constituted 74.4-96.8% of the total organic acids in the leachate. However in semi-continuous mode the content of lactate in the leachate could be reduced less than 0-2% for leach bed reactors operated at feeding loads of 50-150Â g/d although lactate accumulation occurred at a feeding load of 200Â g/d. Furthermore the organic acid shifted to acetate and butyrate, providing ideal substrates for anaerobic digestion.
Journal: Bioresource Technology - Volume 247, January 2018, Pages 711-715