Bioreactor performances in continuous anaerobic co-digestion of chicken litter with agro-industrial wastes: effect of C/N ratio, organic loading and lignocellulose fractionation
In this study the anaerobic digestion (AD) of four different agro-industrial substrates,namely,chicken litter (CL),yoghurt whey (YW),wheat straw (WS) and hay grass (HG) was assessed under mesophilic conditions.The reactors were operated at organic lodings (OLRs) ranging from 2.0 to 3.0 g TS/L.d and hydraulic retention time (HRT) of 20 days.Using CL as the main substrate four different mixes (CL∶YW,CL∶YW∶WS,CL∶YW∶HG,and CL∶YW∶WS∶HG) were prepared such that the final C/N ratios are in the range of 21.5-22.5.The biomethane production from CL as a single substrate was 91.8±4.9 mL CH4/g TSadded at OLR of 2.0 gTS/L.d and further increase in OLRs decrease the methane production.The optimum condition was observed to be CL∶ YW∶ WS 60∶20∶20 which produces 54.8%,67.4% and 116.6% increase in total methane production at ORL of 2.0,2.5,3.0 gTS/L.d,respectively,compared to CL (single substrate).The sequential fractionation results showed that increasing the OLR decreases the water soluble content and increases the cellulose contents.TS,VS,COD removal were also decreased at higher ORLs.However,the VA as well as the pH increased with the increase in OLR.The highest TS,VS and COD removal were observed to be 40.75%,51.34% and 64.95%.
Continuous anaerobic digestion C/N ratio organic loading ratio chicken litter agro-industrial wastes lignocellulose fractionation bio-reactor performance
Zubayeda Zahan Maazuza Z.Othman Tim H.Muster
School of Engineering-Civil, Environmental & Chemical Engineering Disciplines, RMIT University, P.O. CSIRO Land and Water, Private Bag 2., Glen Osmond, 5064, South Australia, Australia
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
426-429
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）