Abstract：
:In order to elucidate the instability mechanism, screen early warning indicators, and propose control measures, the mesophilic digestion of vegetable waste (VW) was carried out at organic loading rates (OLR) of 0.5, 1.0, and 1.5g volatile solid (VS)/(Ld). The process parameters, including biogas components, volatile fatty acids (VFA), ammonia, pH, total alkalinity (TA), bicarbonate alkalinity (BA), and intermediate alkalinity (IA), were monitored every day. Digestion was inhibited at OLR of 1.5gVS/(Ld). The primary causes of instability are a high sugar and negligible ammonia content, in addition to the feed without effluent recirculation, which led to BA loss. The ratios of CH4/CO2, VFA/BA, propionate, n-butyrate and iso-valerate were selected as early warning indicators. In order to maintain the digestion of VW at a high OLR, control measures including effluent recirculation and trace element addition are recommended.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Li D,Chen L,Liu X,Mei Z,Ren H,Cao Q,Yan Zdoi
10.1016/j.biortech.2017.07.098subject
Has Abstractpub_date
2017-12-01 00:00:00pages
90-97issue
Pt Aeissn
0960-8524issn
1873-2976pii
S0960-8524(17)31214-2journal_volume
245pub_type
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