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- W4313135630 abstract "AbstractResource recovery from wastewater treatment plants (WWTPs) has gained considerable popularity due to a worldwide shortage of carbon and energy resources. Short-chain volatile fatty acids (VFAs) are sustainable bioproducts with a wide range of applications, including a preferred substrate for bacteria involved in biological nutrient removal (BNR) wastewater treatment systems. This study applies acid-phase anaerobic digestion to produce VFAs from the primary sludge of the largest Italian WWTP at Castiglione Torinese. Acidogenic fermentation of primary sludge was performed in the pilot semi-continuous anaerobic reactor fed with the hydraulic retention time of 2 days at 45 °C. The digestate produced in the fermentative process was further characterized by the combination of physicochemical laboratory tests as well as the series of bioassay (respirometry) tests. The process simulation model, which was developed and calibrated based on extensive sampling and measuring campaigns, was used to investigate the impact of the resource recovery strategy on the plant's operation. Several operational scenarios were simulated by considering combinations of solid retention times and digestate flow rates. It was found that the optimum denitrification rate in anoxic units can be achieved under SRT >18 days when the digestate flow rate ranges between 100 and 160 m3/d.KeywordsAnaerobic fermentationVolatile fatty acidPrimary sludgeRespirometryEnergy recoveryRenewable energy" @default.
- W4313135630 created "2023-01-06" @default.
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- W4313135630 date "2022-01-01" @default.
- W4313135630 modified "2023-10-11" @default.
- W4313135630 title "Model-Based Feasibility Assessment of a Resource Recovery Strategy in the Largest Italian WWTP" @default.
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- W4313135630 doi "https://doi.org/10.1007/978-3-031-00808-5_74" @default.
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