TY  - JOUR
JF  - Water (Switzerland)
AV  - none
PB  - MDPI AG
VL  - 13
Y1  - 2021///
IS  - 5
KW  - Bagasse; Biogas; Biological water treatment; Carbon; Delignification; Liquid methane; Methane; Petroleum refineries; Sewage treatment plants; Sludge digestion; Sodium hydroxide; Substrates; Wastes; Wastewater treatment
KW  -  Anaerobic co-digestion; Anaerobic digestion technology; Batch experiments; Biogas and methanes; Biological sludge; Solid-liquid ratio; Sugar-cane bagasse; Wastewater treatment plants
KW  -  Anaerobic digestion
KW  -  activated sludge; anaerobic digestion; biogas; biotechnology; carbon isotope ratio; crop residue; experimental study; industrial production; nitrogen isotope; organic pollutant; substrate
TI  - Sugarcane bagasse as a co-substrate with oil-refinery biological sludge for biogas production using batch mesophilic anaerobic co-digestion technology: Effect of carbon/nitrogen ratio
N2  - Man-made organic waste leads to the rapid proliferation of pollution around the globe. Effective bio-waste management can help to reduce the adverse effects of organic waste while contributing to the circular economy at the same time. The toxic oily-biological sludge generated from oil refineriesâ?? wastewater treatment plants is a potential source for biogas energy recovery via anaerobic digestion. However, the oily-biological sludgeâ??s carbon/nitrogen (C/N) ratio is lower than the ideal 20-30 ratio required by anaerobic digestion technology for biogas production. Sugarcane bagasse can be digested as a high C/N co-substrate while the oily-biological sludge acts as a substrate and inoculum to improve biogas production. In this study, the best C/N with co-substrate volatile solids (VS)/inoculum VS ratios for the co-digestion process of mixtures were determined empirically through batch experiments at temperatures of 35-37 °C, pH (6-8) and 60 rpm mixing. The raw materials were pre-treated mechanically and thermo-chemically to further enhance the digestibility. The best condition for the sugarcane bagasse delignification process was 1 (w/v) sodium hydroxide, 1:10 solid-liquid ratio, at 100 °C, and 150 rpm for 1 h. The results from a 33-day batch anaerobic digestion experiment indicate that the production of biogas and methane yield were concurrent with the increasing C/N and co-substrate VS/inoculum VS ratios. The total biogas yields from C/N 20.0 with co-substrate VS/inoculum VS 0.06 and C/N 30.0 with co-substrate VS/inoculum VS 0.18 ratios were 2777.0 and 9268.0 mL, respectively, including a methane yield of 980.0 and 3009.3 mL, respectively. The biogas and methane yield from C/N 30.0 were higher than the biogas and methane yields from C/N 20.0 by 70.04 and 67.44, respectively. The highest biogas and methane yields corresponded with the highest C/N with co-substrate VS/inoculum VS ratios (30.0 and 0.18), being 200.6 mL/g VSremoved and 65.1 mL CH4/g VSremoved, respectively. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
SN  - 20734441
A1  - Ghaleb, A.A.S.
A1  - Kutty, S.R.M.
A1  - Salih, G.H.A.
A1  - Jagaba, A.H.
A1  - Noor, A.
A1  - Kumar, V.
A1  - Almahbashi, N.M.Y.
A1  - Saeed, A.A.H.
A1  - Saleh Al-dhawi, B.N.
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102659280&doi=10.3390%2fw13050590&partnerID=40&md5=94b3628a789be832b7c7d5b0880c101e
N1  - cited By 40
ID  - scholars15131
ER  -