Enhanced biogas production using cow manure to stabilize co-digestion of whey and primary sludge

Increasing biogas production from municipal anaerobic digesters via additional loading with industrial/agricultural wastes offers a low-cost, sustainable energy generation option of significant untapped potential. In this work, bench-top reactors were used to mimic a full-scale primary sludge digest...

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Veröffentlicht in:Environmental technology. - 1993. - 34(2013), 17-20 vom: 02. Sept., Seite 2491-6
1. Verfasser: Shilton, A (VerfasserIn)
Weitere Verfasser: Powell, N, Broughton, A, Pratt, C, Pratt, S, Pepper, C
Format: Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Biofuels Manure Milk Proteins Sewage Whey Proteins
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520 |a Increasing biogas production from municipal anaerobic digesters via additional loading with industrial/agricultural wastes offers a low-cost, sustainable energy generation option of significant untapped potential. In this work, bench-top reactors were used to mimic a full-scale primary sludge digester operating at an organic loading rate (OLR) of 2.4 kg COD/m3 d and a 20 d hydraulic retention time (HRT). Co-digestion of whey with primary sludge was sustained at a loading rate of 3.2 kg COD/m3 d (17 d HRT) and boosted gas production to 151% compared to primary sludge digestion alone. Addition of chemical alkalinity enabled co-digestion of whey with primary sludge to be maintained at an elevated OLR of 6.4 kg COD/m3 d (11 d HRT) with gas production increased to 208%. However, when the chemical addition was simply replaced by cow manure, stable operation was maintained at OLRs of 5.2-6.9 kg COD/m3 d (11-14 d HRT) with gas production boosted up to 268% 
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