چکیده مقاله
Background Municipal solid waste MSW and wastewater sludge are notable by products of Iran's urbanization Upwards of 1,900 tons of MSW from Mashhad is dumped every day at the Miami landfill, while the Al Teymour wastewater treatment plant generates huge amounts of sludge The waste streams have a high level of biodegradable organic matter but are not yet harnessed completely, thus emitting greenhouse gases and posing other environmental concerns Harnessing their energy potential through anaerobic digestion may provide a sustainable and effective waste to energy approach Methodologies This research formulated a deterministic mass balance model coupled with the modified Gompertz model for the estimation of methane production from MSW, sludge, and co digestion Real composition data of Mashhad's MSW and real operating data of the AlTeymour WWTP were utilized as model inputs Three scenario groups were modelled: i MSW alone, ii sludge alone, and iii co digestion at different ratios 85:15, 90:10, 80:20, 50:50 Results The MSW alone scenario had the greatest cumulative methane production ~2 1 × 10⁵ m³ during 45 days Co digestion at the 90:10 and 85:15 ratios generated earlier but lower daily maxima ~12,500 m³/day , supporting limited sludge addition synergistic effects The energy recovery potential amounted to 7 2 × 10⁵ MWh after 45 days, which would power tens of thousands of homes As compared, the sole digestion of the sludge produced little methane, whereas higher fractions of sludge ≥50% lowered the peak as well as cumulative yields Conclusion Co digestion of MSW and sludge is a more advantageous option than mono digestion, especially for Mashhad It can reduce landfilling, lower methane emissions, and support SDGs 7, 11, 12, and 13 Future studies should consider seasonal waste variations, inhibition factors, and economic assessments for broader adoption
کلیدواژهها
نویسندگان
Sina Rouhsaz
Faculty of Civil and Environmental Engineering, AmirKabir University of Technology, Tehran, Iran
SJamshid Mousavi
Faculty of Civil and Environmental Engineering, Amir Kabir University of Technology, Tehran, Iran
Taghi Ebadi
Faculty of Civil and Environmental Engineering, Amir Kabir University of Technology, Tehran, Iran
شیوه ارجاع
Rouhsaz, Sina and Mousavi, SJamshid and Ebadi, Taghi,1404,Assessment of Energy Recovery Potential from Sewage Sludge and Organic Municipal Solid Waste: A Case Study of Mashhad, Iran,The 3rd National Conference on Environmental Challenges: The role of industry, mining, and society in developing green governance,Tehran
ارائهشده در
مجموعه مقالات سومین کنفرانس و نمایشگاه ملی چالش های محیط زیستی: نقش صنعت، معدن و جامعه در گسترش حکمرانی سبز19 آبان 1404 · تهران