Stabilization of anaerobic digestion of kitchen wastes using protein-rich additives: Study of process performance, kinetic modelling and energy balance

Methane production by anaerobic co‐digestion of dairy manure and cassava wastes for energy recovery

“…Since the pH is crucial for process stability, buffering capacity is an important parameter. As discussed by Isha et al , 42 protein‐rich substrate could help to improve buffering capacity as it releases ammoniacal nitrogen (NH 3 ) or ammonium during degradation. Under aqueous conditions, NH 3 reacts with CO 2 to form ammonium bicarbonate (NH 4 HCO 3 ), which contributes to the buffering capacity.…”

Anaerobic co-digestion of dry fallen leaves, fruit/vegetable wastes and cow dung without an active inoculum – A biomethane potential study

“…The experimental biogas and methane yields were fitted with the modified Gompertz kinetic model, one of the most preferred models by previous literature (Isha et al, 2021). The parameters such as maximum biogas/biomethane production potential, daily biogas/biomethane production rate and lag phase were simulated from the model as reported in earlier literature (Isha et al, 2021) as shown in Eq. ( 2).…”

“…where M is the biogas yield (in mL/ g. VS) with respect to time t (in days), P b is the maximum biogas/biomethane potential of the substrate (in mL/ g. VS), R m is the maximum biogas/biomethane production rate (in mL/ g. VS), λ is the lag phase time taken for biogas/biomethane production (in days), e is the Euler's function which is equal to the value 2.7183 (Isha et al, 2021).…”

“…Despite the beneficial characteristics of having high volatile solids (VS), AD of fruit and vegetable wastes (FVW) has been challenging for long-term stable operation (D' Silva et al, 2021a). This is because the inconsistent generation rate, varying composition with regards to time and regions and high rate of biodegradability of FVW lead to volatile fatty acids (VFAs) accumulation, disrupting the process stability (Isha et al, 2021(Isha et al, , 2020. Various ways have been investigated to tackle the challenges; one of them is the anaerobic co-digestion (AcoD) of lignocellulosic biomass with FVW.…”

“…The CD is a common inoculation substrate used in AD reactors in regions predominantly dependent upon agricultural/farm livelihood (Paes et al, 2020). The CD inoculated biogas plant is kept idle for at least 1 to 2 months to develop methanogens (Isha et al, 2021). The indigenously available microflora proliferates inside the digester during this idle condition.…”