Abstract：
:The effects of lime mud from papermaking process (LMP) addition as buffer agent and inorganic nutrient on the anaerobic digestion stability of food waste (FW) were investigated under mesophilic conditions with the aim of avoiding volatile fatty acids accumulation, and inorganic elements deficiency. When LMP concentration ranged from 6.0 to 10g/L, the FW anaerobic digestion could maintain efficient and stable state. These advantages are attributed to the existence of Ca, Na, Mg, K, Fe, and alkaline substances that favor the methanogenic process. The highest CH4 yield of 272.8mL/g-VS was obtained at LMP and VS concentrations of 10.0 and 19.8g/L, respectively, with the corresponding lag-phase time of 3.84d and final pH of 8.4. The methanogens from residue digestates mainly consisted of Methanobrevibacter, coccus-type and sarcina-type methanogens with LMP addition compared to Methanobacteria in control. However, higher concentration of LMP inhibited methanogenic activities and methane production.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang J,Wang Q,Zheng P,Wang Ydoi
10.1016/j.biortech.2014.08.003subject
Has Abstractpub_date
2014-10-01 00:00:00pages
270-277eissn
0960-8524issn
1873-2976pii
S0960-8524(14)01110-9journal_volume
170pub_type
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