Volatile Fatty Acids Production from Codigestion of Food Waste and Sewage Sludge Based on β-Cyclodextrins and Alkaline Treatments

Figure 4

Composition of VFAs from codigestion of FW and SS (3 : 2) with different treatments at 8 d. The pH control was divided into initial pH 10 adjustment (ini pH = 10) and constant pH 10 adjustment (cons pH = 10). The β-CD dosage was 0.2 g/g total solid (TS). The mixture of FW and SS without any treatment was set as control test (CK).