Effect of inoculum/substrate ratio on methane yield and orthophosphate release from anaerobic digestion of Microcystis spp.
A batch anaerobic test was conducted to evaluate the effects of inoculum/substrate ratios (ISRs) on the methane yield and orthophosphate release from the anaerobic digestion of Microcystis spp. The results demonstrated an obvious influence on methane yield and orthophosphate release by ISR. The maximum methane yield decreased from 140.48 to 94.42 mL/gVS when the ISR decreased from 2.0 to 0.5. The highest maximum methane yield calculated from Ørskov equation was 153.66 mL/gVS at ISR value of 1.0. The values of pH, ammonia and volatile fatty acids (VFAs) corroborated the appropriate stability of this anaerobic process.
Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Songling Road 189, Qingdao, Shandong Province 266101, PR China.
Shujuan
S
Zeng
Xianzheng
X
Yuan
Xiaoshuang
X
Shi
Yanling
Y
Qiu
D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D002681:China; D005068:Eutrophication; D005618:Fresh Water; D005740:Gases / Q000032:analysis; D008372:Manure; D008697:Methane / Q000032:analysis*; D046931:Microcystis / Q000737:chemistry / Q000378:metabolism*; D010710:Phosphates / Q000032:analysis*
D005740:Gases; D008372:Manure; D010710:Phosphates; D008697:Methane