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A platform for research: civil engineering, architecture and urbanism
Toward Energy Neutrality in Municipal Wastewater Treatment: A Systematic Analysis of Energy Flow Balance for Different Scenarios
https://orcid.org/0000-0002-4044-2888
To reduce operational costs and carbon footprints, it is highly desirable to achieve energy neutrality in municipal wastewater treatment plants (WWTPs). We reviewed more than 100 nitrification/denitrification (N/DN)- and anaerobic ammonia oxidation (ANAMMOX)-based wastewater treatment systems. The energy consumption performance of N/DN systems ranged from 0.3 to 4 kWh/kg of COD and from 5 to 15 kWh/kg of N, while those of ANAMMOX-based systems ranged from 1 to 5 kWh/kg of COD and from 0.5 to 1.5 kWh/kg of N. According to an energy balance analysis of typical domestic wastewater (COD = 500 mg/L; TN = 50 mg/L) treatment, the conventional N/DN process consumes an average of 0.5 kWh/m3 (1.78 MJ/m3) more energy than the amount recovered from the digestion and incineration of its sludge. However, if wastewater is pretreated using a chemically enhanced primary treatment or anaerobic treatment (AT), subsequent ANAMMOX-based wastewater treatment systems may realize WWTP energy autarky or even electricity outputs of ≤0.17 kWh/m3. In such a nexus of energy recovery, the biogas generation from the AT or the digestion of sludge would be a more effective way to recover energy than the incineration of dewatered digestates. The combination of early stage COD capture and ANAMMOX is a promising approach to achieving sustainable energy performance in future WWTPs.
A new benchmarking analysis is put forward in this study to validate the energy balance of different mainstream wastewater treatment plants.
Toward Energy Neutrality in Municipal Wastewater Treatment: A Systematic Analysis of Energy Flow Balance for Different Scenarios
https://orcid.org/0000-0002-4044-2888
To reduce operational costs and carbon footprints, it is highly desirable to achieve energy neutrality in municipal wastewater treatment plants (WWTPs). We reviewed more than 100 nitrification/denitrification (N/DN)- and anaerobic ammonia oxidation (ANAMMOX)-based wastewater treatment systems. The energy consumption performance of N/DN systems ranged from 0.3 to 4 kWh/kg of COD and from 5 to 15 kWh/kg of N, while those of ANAMMOX-based systems ranged from 1 to 5 kWh/kg of COD and from 0.5 to 1.5 kWh/kg of N. According to an energy balance analysis of typical domestic wastewater (COD = 500 mg/L; TN = 50 mg/L) treatment, the conventional N/DN process consumes an average of 0.5 kWh/m3 (1.78 MJ/m3) more energy than the amount recovered from the digestion and incineration of its sludge. However, if wastewater is pretreated using a chemically enhanced primary treatment or anaerobic treatment (AT), subsequent ANAMMOX-based wastewater treatment systems may realize WWTP energy autarky or even electricity outputs of ≤0.17 kWh/m3. In such a nexus of energy recovery, the biogas generation from the AT or the digestion of sludge would be a more effective way to recover energy than the incineration of dewatered digestates. The combination of early stage COD capture and ANAMMOX is a promising approach to achieving sustainable energy performance in future WWTPs.
A new benchmarking analysis is put forward in this study to validate the energy balance of different mainstream wastewater treatment plants.
Toward Energy Neutrality in Municipal Wastewater Treatment: A Systematic Analysis of Energy Flow Balance for Different Scenarios
https://orcid.org/0000-0002-4044-2888
To reduce operational costs and carbon footprints, it is highly desirable to achieve energy neutrality in municipal wastewater treatment plants (WWTPs). We reviewed more than 100 nitrification/denitrification (N/DN)- and anaerobic ammonia oxidation (ANAMMOX)-based wastewater treatment systems. The energy consumption performance of N/DN systems ranged from 0.3 to 4 kWh/kg of COD and from 5 to 15 kWh/kg of N, while those of ANAMMOX-based systems ranged from 1 to 5 kWh/kg of COD and from 0.5 to 1.5 kWh/kg of N. According to an energy balance analysis of typical domestic wastewater (COD = 500 mg/L; TN = 50 mg/L) treatment, the conventional N/DN process consumes an average of 0.5 kWh/m3 (1.78 MJ/m3) more energy than the amount recovered from the digestion and incineration of its sludge. However, if wastewater is pretreated using a chemically enhanced primary treatment or anaerobic treatment (AT), subsequent ANAMMOX-based wastewater treatment systems may realize WWTP energy autarky or even electricity outputs of ≤0.17 kWh/m3. In such a nexus of energy recovery, the biogas generation from the AT or the digestion of sludge would be a more effective way to recover energy than the incineration of dewatered digestates. The combination of early stage COD capture and ANAMMOX is a promising approach to achieving sustainable energy performance in future WWTPs.
A new benchmarking analysis is put forward in this study to validate the energy balance of different mainstream wastewater treatment plants.
Toward Energy Neutrality in Municipal Wastewater Treatment: A Systematic Analysis of Energy Flow Balance for Different Scenarios
Wu, Dong (author) / Li, Xiangzhong (author) / Li, Xiangdong (author)
ACS ES&T Water ; 1 ; 796-807
2021-04-09
Article (Journal)
Electronic Resource
English
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