Effects of inoculum to substrate ratio, substrate mix ratio and inoculum source on batch co-digestion of grass and pig manure

Evaluation the anaerobic digestion performance of solid residual kitchen waste by NaHCO3 buffering

“…The CMP achieved the maximum of 479 mL/gTS in B1, whilst the CMP in B3 and B4 decreased rapidly, with the minimum value 47.51 mL/gTS in B4. These results were similar to that reported by Dechrugsa et al [19], in which higher ISR induced higher methane yield. According to Fig.…”

“…This ISR value was lower than the previous reported value. Raposo et al [20] found that the methane yield coefficient at four different inoculum to substrate (3.0, 2.0, 1.5 and 1.0) showed only slight variation in AD of maize in batch tests; while, Dechrugsa et al [19] reported that ISR higher than 3-4 could give consistent biomethane production in batch co-digestion.…”

Enhancing sludge biodegradability through free nitrous acid pre-treatment at low exposure time

“…Each BMP test contained 80 mg of inoculum and 20 mg of WAS pretreated with FNA (0, 2.49, 3.55 and 4.62 mg N-HNO 2 /L; see Table 1) according to Zahedi et al [19]. Ratios inoculum/ Substrate (I/S) between 2 and 4 are required to ensure the proper performance of BMP tests [20,21]. A control test (WAS without nitrite and pH control) was also conducted.…”

Inoculum selection is crucial to ensure operational stability in anaerobic digestion

“…The overall tolerance of the system is partially determined either by the treated waste stream (nitrogen content), the frequency of feeding, or the operational conditions of the reactor itself (De Vrieze et al 2013;Dearman et al 2006;Krakat et al 2011). Inoculum selection might also be crucial to ensure stable operation in the long term, as it determines the initial operating potential of the anaerobic digester (Dechrugsa et al 2013;Wittebolle et al 2009). …”