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] |