Open AccessAnaerobic Co-digestion of Giant Reed for Biogas Recovery
Author(s) -
Zainab Z. Ismail,
Nazik A. Noori
Publication year - 2018
Publication title -
maǧallaẗ al-handasaẗ/journal of engineering
Language(s) - English
Resource type - Journals
eISSN - 2520-3339
pISSN - 1726-4073
DOI - 10.31026/j.eng.2018.03.06
Subject(s) - mesophile , anaerobic digestion , biogas , chemistry , alkali metal , digestion (alchemy) , pulp and paper industry , biogas production , thermophile , gompertz function , waste management , methane , mathematics , chromatography , biochemistry , biology , bacteria , enzyme , organic chemistry , genetics , statistics , engineering
This study investigated the feasibility of anaerobic co-digestion of giant reed (GR) inoculated with waste manure as a co-substrate for biogas production. The performance of co-digestion was evaluated in 4 anaerobic digesters operated in batch mode at different conditions. The effects of alkali pretreatment with NaOH (4% w/v) solution, inoculum type, and thermal condition were studied. The results demonstrated that the alkali-pretreatment of GR enhanced the biogas generation by about 15% at mesophilic conditions. Thermophilic conditions enhanced the biogas recovery from both alkali-free and alkali pretreated GR by 15% and 127%, respectively. The kinetic study of the co-digestion process of GR for biogas recovery suggested a significant agreement between measured and predicted values obtained by Modified Gompertz Model with correlation coefficients ≥ 0.98 indicating favorable conditions for the co-digestion of inoculated GR.