Evaluation of the energy efficiency of a large wastewater treatment plant in Italy

2016 ◽  
Vol 161 ◽  
pp. 404-411 ◽  
Author(s):  
Deborah Panepinto ◽  
Silvia Fiore ◽  
Mariantonia Zappone ◽  
Giuseppe Genon ◽  
Lorenza Meucci
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant

scholarly journals Measurement of Energy Production from Biogas: Evidence from the Wastewater Treatment Plant in Durres

2020 ◽  
Vol 5 (10) ◽  
pp. 1260-1262
Author(s):  
Stela Sefa ◽  
Tania Floqi ◽  
Julian Sefa
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Energy Production ◽  
Biogas Production ◽  
Treatment Plant ◽  
Electricity Consumption ◽  
Waste To Energy ◽  
Energy Requirements ◽  
Daily Consumption

The wastewater treatment plant serving the city of Durres, which is the second most populous city of Albania, employs the tertiary advanced wastewater treatment method and engages in biogas production to achieve energy efficiency. In order to empirically evaluate the plant’s energy efficiency realization, the total biogas produced and converted to electricity for daily consumption was measured during a three years period (2016 - 2018). The highest electricity produced was recorded in 2016, with a daily average of 844kWh compared to 550kWh and 370kWh in 2017 and 2018, respectively. So that the plant meets proper criteria to classify as an energy-efficient entity, 30.0 percent of its electricity consumption must be derived from biogas. Converted in kWh, the plant should generate 2,975 kWh/day. Based on the biomass and energy values measured during the study period, it is concluded that electricity supplied from biogas met 6.0 percent of the plant’s energy requirements, or one fifth of the energy-efficiency target. While the plant was successful in carrying out the full waste-to-energy production process, the electricity supplied from biogas was very low and did not fulfil the plant’s self-energy requirements.

scholarly journals Mass flow and energy efficiency in a large water reclamation plant in Singapore

2013 ◽  
Vol 3 (4) ◽  
pp. 402-409 ◽  
Author(s):  
Cao Yeshi ◽  
Lau Choon Leng ◽  
Lin Li ◽  
Lee Yingjie ◽  
Lee Kah Seng ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Mass Flow ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Water Reclamation ◽  
Municipal Wastewater Treatment ◽  
Balance Study ◽  
Municipal Wastewater Treatment Plant

This paper presents the results of a measured data-based mass flow and balance study in UluPandan Water Reclamation Plant (WRP), the second largest municipal wastewater treatment plant in Singapore. The results are benchmarked against the Strass wastewater treatment plant in Austria, which has achieved energy self-efficiency. The gaps between the two plants have been identified and areas for process improvement in UluPandan WRP, especially those related to energy efficiency, have been proposed. This case study demonstrates that mass flow and balance is an effective tool in improving process performance and the energy efficiency of a municipal wastewater treatment plant.

scholarly journals Analysis of energy efficiency and energy consumption costs: a case study for regional wastewater treatment plant in Malaysia

2016 ◽  
Vol 7 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Nor Azuana Ramli ◽  
Mohd Fairuz Abdul Hamid
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Energy Consumption ◽  
Linear Regression ◽  
Central Region ◽  
Wastewater Treatment Plant ◽  
Arima Model ◽  
Treatment Plant ◽  
Linear Regression Method ◽  
Electricity Cost

The objective of this study is to analyze the possibilities of increasing energy efficiency in the central region wastewater treatment plant by focusing on two aspects: biogas production and prediction of energy production. The analysis is based on one of the biggest central region wastewater treatment plants in Malaysia. After studying the energy efficiency, which consists of optimization of energy consumption and enhancing gas generation, the prediction of power consumption is performed using an autoregressive integrated moving average (ARIMA) model. The prediction results are compared with the linear regression method. Comparison shows that even though the total cost of savings is greater by using linear regression, the prediction through ARIMA is more accurate and has smaller root mean square error. The implementation of these two aspects managed to increase energy efficiency by 10% of energy recovery that could further reduce electricity cost and reduction of sludge cake disposal off site. The study recommends other aspects, such as modification in setting up the frequency of variable speed drive for aerators and blowers and optimizing number of feeds into train unit processes within aeration tanks in increasing energy efficiency.

Can a wastewater treatment plant be a powerplant? A case study

2008 ◽  
Vol 57 (10) ◽  
pp. 1555-1561 ◽  
Author(s):  
N. Schwarzenbeck ◽  
W. Pfeiffer ◽  
E. Bomball
Keyword(s):  
Energy Efficiency ◽  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Anaerobic Sludge ◽  
Organic Substrates ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plant

Today wastewater treatment plants are evaluated not only in terms of their treatment efficiency but also concerning their energy efficiency. Increasing energy efficiency can be realized either through operational optimisation or by realising an already existing potential for energy generation on-site. The main source of energy at a municipal wastewater treatment plant is the biogas produced in the anaerobic sludge digester. Studies indicate excess digester capacities of about 20% in Germany available for co-fermentation of organic substrates other than sewage sludge. This paper presents an example of a municipal wastewater treatment plant going towards an energy self-sufficient operation and even a surplus energy production as the result of an increasing co-fermentation of sludge from grease skimming tanks. In 2005 on average 113% of the electricity consumed for plant operation was generated on-site in gas engines. Co-fermentation of about 30% (related to the total dry residue input) of grease interceptor sludge in the presented case does not only effect a 4-times increased gas yield, but also an intensified 20% higher anaerobic degradation of the organic matter of the sewage sludge and thus having a positive influence not only on the energy and financial balance but also on the anaerobic sludge stabilisation with respect to the degradation degree of the organic fraction.

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