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Table 10 Waste, reactor configuration, and operation for the production of VFAs

From: Integrated systems for biopolymers and bioenergy production from organic waste and by-products: a review of microbial processes

Type of waste Organic content (mg COD l−1) Reactor type and operating conditions VFA production References
Waste activated sludge 18.657 Batch, 55 °C, pH = 8, HRT = 9 days 368 mg COD gVSS−1 [197]
14.878 Batch, 21 °C, HRT = 6 days 339 mg COD l−1 [198]
Primary sludge 22.838 Batch, 21 °C, HRT = 6 days 85 mg COD gVSS−1 [199]
20.631 Batch, 21 °C, pH = 10, room temp, HRT = 5 days 60 mg COD gVSS−1 day−1 [200]
Food waste 91.900 Batch, 37 °C, pH = 5.5 8950 mg COD l−1 [201]
146.1 Batch, 35 °C, HRT = 5 days 5610 mg COD l−1 [202]
Kitchen waste 166.18 Batch, 35 °C, pH = 7, HRT = 4 days 36 mg l−1 [203]
OFMSW 347.0 Batch, 14–22 °C, pH = 4–5, HRT = 4–4.5 days 40 mg g−1 VS [204]
196.7 Plug flow, 37 °C, pH = 5.7–6.1, HRT = SRT = 6 days, OLR = 38.5 gVS l−1 day−1 23.110 mg l−1 [15]
Palm oil mill 88.0 Semi-continuous, 30 °C, pH = 6.5, HRT = 4 days 15.300 mg l−1 [205]
Olive oil mill 37.0 Packed bed biofilm, 25 °C, pH = 5.2–5.5, HRT = 14 days, OLR = 26 g COD l−1 day−1 10.700 mg COD l−1 [206]
Cheese whey 4590 CSTR, 37 °C, pH = 6, HRT = 2.1 days 0.84 gVFA-COD g−1 sCOD−1 [207]