Anaerobic Co-Digestion of Domestic Sewage Sludge with Food Waste: Incorporating Food Waste as a Co-Substrate under Semi-Continuous Operation

Abstract

Anaerobic co-digestion of domestic sewage sludge with food waste as a substrate for biogas production and as a mean for waste management was conducted. The food waste was incorporated into the bioreactor as a cosubstrate semi-continuously via replacement mode and addition mode of operations in ratios up to 50%. The methane gas yield under the replacement mode of operation ranged from 295 to 1358 ml/gVS added and from 192 to 462 ml/gVS added for the replacement mode of operation and the addition mode of operation, respectively. The results indicate that the methane gas yield increases along with the percentage share of food waste in the feed. Anaerobic co-digestion under semi-continuous operation enabled handling large organic loadings compared to batch co-digestion processes.

Pyrolysis of domestic sewage sludge: influence of operational conditions on the product yields using factorial design

“…In Jordan SS quantities are estimated to reach about 180.7 tons/day by 2022, this amount is equivalent to 65,955.5 tons/year. The natural decomposition of the accumulated sludge in Jordan resulted in emission of about 10 5 ton of CO 2 per year ( Aljbour et al., 2021a ). The current management of SS in Jordan lacks any treatment method except dewatering and air drying.…”

“…The SS in 32 wastewater treatment plants (WWTP) out of 34 is stored at the same plants, then transported to the local landfills ( Breulmann et al., 2019 ). This practice can cause serious environmental and economic problems, as well as an adverse effect on public health and safety ( Al-Hamaiedeh, 2010 ; Aljbour et al., 2021a , 2021b ). The high level of pathogens and high possibly concentration of heavy metals in SS, besides the high generation rates, necessitates proper management of this waste ( Agrafioti et al., 2013 ).…”

Evaluating the In-Site Sorting of Solid Waste in Selected Educational Institutions – A Pilot Study

“…Recently, more attention has been paid to SW management in Jordan, focusing on recycling, recovery, and reuse. Therefore, researchers have been funded and conducted studies concerning energy and material recovery from Evaluating the In-site Sorting of Solid Waste in Selected Educational Institutions -A Pilot Study Husam Al-Hamaiedeh 1* , Enam Al-Rafiaha 1 , Omar Al-Khashman 2 , Osama Mohawesh 3 , Ali El Hanandeh 4 SW in Jordan [Aljbour et al, 2021;Al-Hajaya et al, 2021;Al Nawaiseh et al, 2021]. Jaradat and Al-Khashman (2013) evaluated the potential recovery of materials from municipal SW (MSW) in Jordan, Ma'an; they concluded that municipal SW management is still facing many challenges due to insufficient data concerning its quality and characteristics.…”

Pyrolysis of Domestic Sewage Sludge: Effect of Process Parameters on Biochar Calorific Value

“…On the other hand, more than 95% of the consumed energy in Jordan is being imported from outside the country [3][4][5][6]. The DSS is a heterogeneous biomass characterized by high organic matter content, these biosolids could be a source of clean bioenergy and biofertilizers if they converted thermochemically namely via pyrolysis [7][8][9].…”