Integrated review of resource recovery on aerobic granular sludge systems: Possibilities and challenges for the application of the biorefinery concept
| Autor: | Tasso Jorge Tavares Ferreira, André Bezerra dos Santos, Silvio Luiz de Sousa Rollemberg, João Pedro Machado de Lima, Amanda Nascimento de Barros |
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| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Biosolids 0208 environmental biotechnology 02 engineering and technology Wastewater 010501 environmental sciences Management Monitoring Policy and Law Raw material Waste Disposal Fluid 01 natural sciences Bioreactors Extracellular polymeric substance Waste Management and Disposal 0105 earth and related environmental sciences Resource recovery Sewage Waste management Extracellular Polymeric Substance Matrix General Medicine Biodegradation Biorefinery Aerobiosis 020801 environmental engineering Anaerobic digestion Environmental science Sewage treatment |
| Zdroj: | Journal of Environmental Management. 291:112718 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2021.112718 |
| Popis: | Aerobic Granular Sludge (AGS) is a biological treatment technology that has been extensively studied in the last decade. The possibility of resource recovery has always been highlighted in these systems, but real-scale applications are still scarce. Therefore, this paper aimed to present a systematic review of resources recovery such as water, energy, chemicals, raw materials, and nutrients from AGS systems, also analyzing aspects of engineering and economic viability. In the solid phase, sludge application in agriculture is an interesting possibility. However, the biosolids' metal concentration (the granules have high adsorption capacity due to the high concentration of extracellular polymeric substances, EPS) may be an issue. Another possibility is the recovery of Polyhydroxyalkanoates (PHAs) and Alginate-like exopolymers (bio-ALE) in the solid phase, emphasizing the last one, which has already been made in some Wastewater Treatment Plants (WWTPs), named and patented as Kaumera® process. The Operational Expenditure (OPEX) can be reduced by 50% in the WWTP when recovery of ALE is made. The ALE recovery reduced sludge yield by up to 35%, less CO2 emissions, and energy saving. Finally, the discharged sludge can also be evaluated to be used for energetic purposes via anaerobic digestion (AD) or combustion. However, the AD route has faced difficulties due to the low biodegradability of aerobic granules. |
| Databáze: | OpenAIRE |
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