Recovery of anaerobic digesters upon hydraulic shock-loading through addition of compost and leachate

dc.conference.date2015-06-22 to 2015-06-25
dc.conference.locationRaleigh, NC, USA
dc.conference.name108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015
dc.contributor.authorGhanimeh, Sophia A.
dc.contributor.authorEl-Fadel, Mutasem
dc.contributor.authorSaikaly, Paskal A.
dc.contributor.departmentWater Desalination and Reuse Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
dc.contributor.departmentDivision of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
dc.contributor.institutionDepartment of Civil and Environmental Engineering, American University of Beirut, Lebanon
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Notre Dame University - Louaize, Lebanon
dc.date.accessioned2020-12-28T08:17:34Z
dc.date.available2020-12-28T08:17:34Z
dc.date.issued2015-01-01
dc.description.abstractThe objective of this study was to test if readily available seeds, namely MSW compost and landfill leachate, could improve the recovery of anaerobic digesters after a hydraulic shock. For this purpose, a 14-L digester was fed with food waste at OLR of 2.5gVS/l/d and HRT of 30 days. Upon a hydraulic shock, specific methane generation decreased and VFAs, notably propionate and acetate, spiked, necessitating a reduction in OLR to 2 gVS/l/d. After 2 HRTs, compost and leachate were added to the digester to speed up the recovery process. As a result, specific methane generation increased to ∼11% higher than pre-shock rates and soluble COD and total and free ammonia decreased to ∼30% lower than initial concentration. Most importantly, VFA concentrations dropped back to initial levels. Similarly, convergence (at the order of magnitude level) of predominant methanogenic orders (Methanobacteriales and Methanosarcinales) was observed. Based on the above, the addition of MSW compost and leachate improved the recovery of anaerobic digesters to hydraulic shock loading.
dc.description.sponsorshipThis work was supported by the National Council for Scientific Research, Lebanon and the Masri Institute of Energy and Natural Resources at the American University of Beirut. Special thanks are extended to the United States Agency for International Development for its support in acquiring the equipment used in the experimental program. Also, special thanks are extended to Mr. M. Alarawi and Dr. S. Ali at the Bioscience Core Laboratory at KAUST.
dc.eprint.versionPre-print
dc.identifier.eid2-s2.0-85026828222
dc.identifier.isbn9781510815582
dc.identifier.issn1052-6102
dc.identifier.pages1919-1924
dc.identifier.urihttp://hdl.handle.net/10754/666698
dc.identifier.volume3
dc.publisherAir and Waste Management Associationinfo@awma.org
dc.relation.urlhttps://research.kaust.edu.sa/en/publications/recovery-of-anaerobic-digesters-upon-hydraulic-shock-loading-thro
dc.rightsArchived with thanks to Air and Waste Management Associationinfo@awma.org
dc.titleRecovery of anaerobic digesters upon hydraulic shock-loading through addition of compost and leachate
dc.typeConference Paper
display.details.left<span><h5>Type</h5>Conference Paper<br><br><h5>Authors</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Ghanimeh, Sophia A.,equals">Ghanimeh, Sophia A.</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=El-Fadel, Mutasem,equals">El-Fadel, Mutasem</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.author=Saikaly, Paskal A.,equals">Saikaly, Paskal A.</a><br><br><h5>KAUST Department</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.department=Water Desalination and Reuse Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia,equals">Water Desalination and Reuse Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia</a><br><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.department=Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia,equals">Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia</a><br><br><h5>Date</h5>2015-01-01</span>
display.details.right<span><h5>Abstract</h5>The objective of this study was to test if readily available seeds, namely MSW compost and landfill leachate, could improve the recovery of anaerobic digesters after a hydraulic shock. For this purpose, a 14-L digester was fed with food waste at OLR of 2.5gVS/l/d and HRT of 30 days. Upon a hydraulic shock, specific methane generation decreased and VFAs, notably propionate and acetate, spiked, necessitating a reduction in OLR to 2 gVS/l/d. After 2 HRTs, compost and leachate were added to the digester to speed up the recovery process. As a result, specific methane generation increased to ∼11% higher than pre-shock rates and soluble COD and total and free ammonia decreased to ∼30% lower than initial concentration. Most importantly, VFA concentrations dropped back to initial levels. Similarly, convergence (at the order of magnitude level) of predominant methanogenic orders (Methanobacteriales and Methanosarcinales) was observed. Based on the above, the addition of MSW compost and leachate improved the recovery of anaerobic digesters to hydraulic shock loading.<br><br><h5>Acknowledgements</h5>This work was supported by the National Council for Scientific Research, Lebanon and the Masri Institute of Energy and Natural Resources at the American University of Beirut. Special thanks are extended to the United States Agency for International Development for its support in acquiring the equipment used in the experimental program. Also, special thanks are extended to Mr. M. Alarawi and Dr. S. Ali at the Bioscience Core Laboratory at KAUST.<br><br><h5>Publisher</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.publisher=Air and Waste Management Associationinfo@awma.org,equals">Air and Waste Management Associationinfo@awma.org</a><br><br><h5>Conference/Event Name</h5><a href="https://repository.kaust.edu.sa/search?spc.sf=dc.date.issued&spc.sd=DESC&f.conference=108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015,equals">108th Air and Waste Management Association Annual Conference and Exhibition - Connecting the Dots: Environmental Quality to Climate, ACE 2015</a><br><br><h5>Additional Links</h5>https://research.kaust.edu.sa/en/publications/recovery-of-anaerobic-digesters-upon-hydraulic-shock-loading-thro</span>
kaust.acknowledged.supportUnitBioscience Core Laboratory
kaust.personSaikaly, Paskal A.
kaust.personSaikaly, Paskal A.
orcid.authorGhanimeh, Sophia A.
orcid.authorEl-Fadel, Mutasem
orcid.authorSaikaly, Paskal A.
Files