Abstract
Excess sludge from a pilot-scale high-rate activated sludge (HRAS) system was digested anaerobically under mesophilic conditions. The pilot-scale HRAS system was initially fed with only wastewater and following that, fed with wastewater together with food waste. Impact of food waste inclusion on anaerobic digestion performance was investigated. Thereafter, a feasibility study was carried out using the performance data obtained from the experimental studies. The results showed that digestion of HRAS sludge could be a preferable option unless excellent biomass-liquid separation could be employed and mineralization of influent chemical oxygen demand (COD) could be suppressed. Additionally, co-treatment of wastewater and food waste increased the methane yield and improved the energy balance of the wastewater treatment plants (WWTPs). Thus, WWTPs can have a surplus in the energy budget.
Original language | English |
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Pages (from-to) | 1027-1036 |
Number of pages | 10 |
Journal | Energy |
Volume | 172 |
DOIs | |
Publication status | Published - 1 Apr 2019 |
Bibliographical note
Publisher Copyright:© 2019 Elsevier Ltd
Funding
This study was conducted as part of a SAN-TEZ project ( 0534.STZ.2013-2 ), which was supported by Ministry of Industry and Technology of Turkey, and Istanbul Environment Management Industry and Trade Company (ISTAC) . Appendix A This study was conducted as part of a SAN-TEZ project (0534.STZ.2013-2), which was supported by Ministry of Industry and Technology of Turkey, and Istanbul Environment Management Industry and Trade Company (ISTAC).
Funders | Funder number |
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ISTAC | |
Istanbul Environment Management Industry and Trade Company | |
Ministry of Industry and Technology of Turkey | |
Bilim, Sanayi ve Teknoloji Bakanliği | 0534.STZ.2013-2 |
Keywords
- Anaerobic digestion
- Co-treatment
- COD balance
- Energy surplus
- Food waste
- High-rate activated sludge system