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Table 1 Comparison of VFAs yield from WAS fermentation by co-digesting carbon-rich substrates

From: What could the entire cornstover contribute to the enhancement of waste activated sludge acidification? Performance assessment and microbial community analysis

Sludge Carbon-rich substrates (adjustment forms) Feedstock proportions VFAs yield References
Adjusting pH (8)-treated WAS Thermal-treated rice (TTR)
(Solid)
50:50% (VSSWAS:VSSTTR) 520 mg COD/g VSS [16]
WAS Perennial ryegrass (Solid) 20:1 (C/N) 369 mg COD/g TS [15]
Mixed sludge (MS) Lime-treated bagasse (LTB) (Solid) 30:70%, 40:60% and 60:40% (gMS:gLTB) 360 mg carboxylic acid/g VS [31]
Alkaline- thermal treated WAS Agaricus bisporus substrates (ABS) (Solid) 45:55% (VSSWAS:VSSABS) 514 mg COD/g VSSWAS+ABS [36]
WAS Sugar beet pulp lixiviation (SBPL) (Solid) 75:25% (vSS:vSBPL) 350 mg COD/g VSS [32]
Dewatered WAS Food waste (FW) (Solid) 12:88% (VSSWAS:VSSFW) 393 mg/g VSS [50]
Ultrasonic treated WAS Alkaline treated CS hydrolysate 65:35% (VSSWAS:VSSCS) 583 mg COD/g VSS This study