| Title | Enhanced anaerobic processes on waste activated sludge: methane yields, hygienization potential and techno-economic feasibility |
| Abstract | Sewage sludge processing is a key issue in wastewater treatment plants due to the inefficacy of conventional treatments to produce high quality biosolids to be safely used in agriculture. Under this framework, the performances of several enhanced stabilization processes, namely ultrasound-pretreated Mesophilic Anaerobic Digestion (US-MAD), thermophilic anaerobic digestion (TAD), thermal-pretreated TAD (TH-TAD) and ultrasound-pretreated inverse Temperature Phased Anaerobic Digestion (iTPAD) have been investigated. Such enhanced processes resulted in higher biogas yields and higher destruction of pathogens with respect to conventional MAD process, thus suggesting their feasibility in full-scale implementation perspectives.
A procedure for technical-economic comparison of new sludge processing lines against conventional ones (benchmarking) was developed, based on the definition of technical issues (e.g. reliability, complexity, etc..) which are rated for each situation. Moreover, capital and operating costs were estimated. The enhanced processes analyzed in this work
showed some potentially critical items, mainly related to energy balance and reagent consumption. |
| Source | WEF/IWA Residuals and Biosolids Conference. The Next Generation of Science, Technology, and Management, Washington (USA), 7-10/06/2015 |
| Keywords | Waste activated sludgethermal pretreatmenttemperature-phased digestionpathogenscoststechnical issuestechno-economic assessmentdecision support system |
| Year | 2015 |
| Type | Presentazione |
| Authors | Andrea Gianico, Giorgio Bertanza, Camilla Maria Braguglia, Matteo Canato, Agata Gallipoli, Giuseppe Laera, Caterina Levantesi, Giuseppe Mininni. |
| Text | 458570 2015 Waste activated sludge thermal pretreatment temperature phased digestion pathogens costs technical issues techno economic assessment decision support system Enhanced anaerobic processes on waste activated sludge methane yields, hygienization potential and techno economic feasibility Andrea Gianico, Giorgio Bertanza, Camilla Maria Braguglia, Matteo Canato, Agata Gallipoli, Giuseppe Laera, Caterina Levantesi, Giuseppe Mininni. IRSA CNR, Water research institute of Rome, Italy. Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Italy. IRSA CNR, Water research institute of Bari, Italy Sewage sludge processing is a key issue in wastewater treatment plants due to the inefficacy of conventional treatments to produce high quality biosolids to be safely used in agriculture. Under this framework, the performances of several enhanced stabilization processes, namely ultrasound pretreated Mesophilic Anaerobic Digestion US MAD , thermophilic anaerobic digestion TAD , thermal pretreated TAD TH TAD and ultrasound pretreated inverse Temperature Phased Anaerobic Digestion iTPAD have been investigated. Such enhanced processes resulted in higher biogas yields and higher destruction of pathogens with respect to conventional MAD process, thus suggesting their feasibility in full scale implementation perspectives. A procedure for technical economic comparison of new sludge processing lines against conventional ones benchmarking was developed, based on the definition of technical issues e.g. reliability, complexity, etc.. which are rated for each situation. Moreover, capital and operating costs were estimated. The enhanced processes analyzed in this work showed some potentially critical items, mainly related to energy balance and reagent consumption. Published version WEF/IWA Residuals and Biosolids Conference. The Next Generation of Science, Technology, and Management Washington USA 7 10/06/2015 Internazionale Contributo Presentazione andrea.gianico GIANICO ANDREA |
