CASE STUDY ON ENERGY EFFICIENCY OF BIOGAS PRODUCTION IN INDUSTRIAL ANAEROBIC DIGESTERS AT MUNICIPAL WASTEWATER TREATMENT PLANTS

2015 ◽  
Vol 14 (2) ◽  
pp. 357-360 ◽  
Author(s):  
Alexandrina Zuza ◽  
Paul Serban Agachi ◽  
Vasile Mircea Cristea ◽  
Abhilash Nair ◽  
Nguyen Ngoc Tue ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Biogas Production ◽  
Municipal Wastewater Treatment ◽  
Anaerobic Digesters ◽  
Municipal Wastewater Treatment Plants

scholarly journals Environmental and Energy Assessment of Municipal Wastewater Treatment Plants in Italy and Romania: A Comparative Study

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1611 ◽  
Author(s):  
Daniela Fighir (Arsene) ◽  
Carmen Teodosiu ◽  
Silvia Fiore
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Greenhouse Gas ◽  
Municipal Wastewater ◽  
Sustainability Assessment ◽  
Wastewater Treatment Plants ◽  
Ghg Emissions ◽  
Energy Performance ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plants

Municipal wastewater treatment plants (MWWTPs) are essential infrastructures in any urban context, but they may be considered as a potential source of greenhouse gas (GHG) emissions and should be coherent with European Union (EU) policy on energy efficiency. This study presents a sustainability evaluation of four Italian and Romanian MWWTPs in terms of energy efficiency and greenhouse gas emissions using Energy Performance and Carbon Emissions Assessment and Monitoring (ECAM) tool software. The obtained results indicated that biogas recovery improved energy performances, while the largest contributions in terms of GHG emissions were in all cases caused by energy consumption and methane produced during wastewater treatment. The Romanian plants exhibited higher GHG emissions, compared to the Italian plants, mainly because of the different values of national conversion factors for grid electricity (0.41 kg CO2/kWh for Italy and 1.07 kg CO2/kWh for Romania). Two scenarios aimed at enhancing the overall sustainability were hypothesized, based on increasing the serviced population or energy efficiency, achieving significant improvements. A sustainability assessment of MWWTPs should be adopted as a useful tool to help water utilities to introduce low-energy, low-carbon management practices as well as being useful for policy recommendations.

scholarly journals Application of microturbines in improving the energy efficiency of municipal wastewater treatment plants in Missouri.

2021 ◽  
Author(s):  
◽  
Tolulope Adewale Kudoro
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Renewable Energy ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Electrical Power ◽  
Treatment Plant ◽  
The State ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plants

Hydropower is a source of renewable energy. It is possible to combine a hydropower installation with an existing wastewater plant while ensuring it still performs its basic purpose. The multipurpose scheme would be integrated into the facility to generate hydropower while also fulfilling its primary role of treating wastewater. The wastewater plant can generate renewable energy and benefit from introducing microturbines. The turbine system is moved by the power in the flowing treated water that is transformed into mechanical energy which rotates the generator and in turn generates electrical power. In this work, the potential for power generation from the energy in the outflow along with the economics of the system in wastewater plants in the state of Missouri was investigated to improve the energy efficiency of the municipal wastewater treatment plants. Data like the daily flow rate, speed of flow, available head, etc about the wastewater plants in Missouri were collected and some interviews held with plant managers of the wastewater treatment plants. The investigation revealed that there are 127 wastewater treatment plants in the state of Missouri with 32 plants discharging less than 1 Mgd, 74 plants discharging between 1 Mgd and 5 Mgd, 13 plants discharging between 5 Mgd and 20 Mgd while just 8 plants had an outflow between 20 Mgd and 120 Mgd range. The flowrate helps in calculating and determining the theoretical and actual amount of power that can be gotten from the micro hydropower system in the wastewater treatment plant. For the actual amount of power gotten, the efficiency factor (efficiency of the turbine, and efficiency of the generator) of the generating system is considered. A brief study on the turbine system was conducted and a crossflow turbine was selected as the most suitable for the wastewater treatment plant as a vast majority of them had low head and high flow capacity. The analysis showed that out of the 127 wastewater treatment plants in the state of Missouri, only 21 treatment plants have the maximum potential to generate power and reduce operating costs. Also, two plants were selected for case studies. The operating cost is reduced because of the decrease in demand for electrical power from the grid. The 21 treatment plants have a daily outflow between 5Mgd to 120Mgd and could produce power through an axial flow turbine that utilizes the kinetic energy in the flow volume.

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