Mesophilic anaerobic digestion(AD)on the feedstocks of household kitchen waste(HKW)and restaurant food waste(RFW)was performed.Five kinds of dewaterability indicators-total solids(TS)

total solids after centrifugation(CTS)

normalized capillary suction time(NCST)

specific resistance to filtration(SRF)and bound water content(BW)were used to evaluate the dewaterability of digestate produced from different stages of AD.TS of digestate ranged from 3.0% to 9.9%

CTS ranged from 10.9% to 31.0%

SRF was 2.1×1013—13.8×1013 m·kg-1

BW was 2.3—15.1 g·(g TS)-1 and NCST was 50.8—163.7 s·L·(g TS)-1.The cumulative methane yield of the digester fed with RFW was always higher than the digester fed with HKW

maximum cumulative methane yield of the former was up to 381 ml·(g VSadded)-1

while that of the latter was just 280 ml·(g VSadded)-1.The dewatering performance of digestate was mainly affected by duration of anaerobic digestion and the digestate produced from RFW was able to achieve a higher dewatering degree

while the dewatering rate of the digestate from HKW was higher.Furthermore

there were significant correlations among TS

normalized CST

SRF and BW of digestate

but the correlation with CST was not significant.