Energy Consumption, Energy-saving and Emissions Reduction of Wastewater Treatment Plants (WWTPs) in Wisconsin

Self Cite

This research analyzes the energy consumption and saving performance in the industries in the U.S.A. All energy assessments implemented were for facilities whose annual energy consumptions less than 9,000,000 kWh (Small and Medium-sized industries) that belong to the manufacturing industries with Standard Industrial Classification (SIC) codes ranging from 2000 to 3999 in addition to SIC codes starting with 49. In this research, assessments are classified based on the SIC codes with recommendations analysis for each classification to get a better idea of what recommendations were suggested in each major industrial sector, knowing that sixty-eight assessments were made, and their SIC ranged from 14 to 49. Additionally, this research could be considered as a guide for energy engineers and other personnel involved in the energy assessment process. The information investigated can give a better prediction for composing better energy demanding industries and minimizing energy consumption. More than 61 energy assessments were conducted for manufacturing facilities and analyzing the data gathered and processed. Through the research, the Fabricated Metal industry achieved the highest average kWh savings and cost savings within the industries studied in this research. While according to the average gigajoule (GJ) savings, the fabricated metal industry ranked second within the studied industries. On the other hand, Food and Kindred Products achieved the highest GJ energy savings within the studied industries. Lighting, motors, compressors, and heating, ventilation, and air conditioning (HVAC) were the most contributing industries in a total of 547 recommendations

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Study of Energy Saving Analysis for Different Industries

Abdelhadi

Salem

Abbas

et al. 2020

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“…1). Several researchers reported on CHP, and the use of digester gas in CHP as fuel [3][4][5][6][7]. Tourlidakis et al [8] investigated CHP generation for small municipality areas for heating purposes in Northern Greece.…”

Section: Introductionmentioning

confidence: 99%

Analytical Study to Use the Excess Digester Gas of Wastewater Treatment Plants

Nourin

Abbas

Qandil

et al. 2020

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This study presents an analytical method that can be used to enhance the power production rate and the energy-saving at wastewater treatment plants. The digester used at wastewater treatment plants produce digester gas by anaerobic digestion, with which biofuel production can be achieved. Biofuels can be used to meet some of the energy requirements of the wastewater treatment facility through Combined Heat and Power (CHP) gas engines (co-generation). Using Micro Gas Turbine (MGT), a CHP technology can be introduced in Wastewater Treatment Plants (WWTPs). The combination of MGTs and absorption chillers is a promising technology as it produces electricity, heating, and cooling simultaneously. The study demonstrated how the waste heat of MGTs could be used to drive absorption chillers. In this analytical study, a detailed technical and economic analysis is provided on the tri-generation system, i.e., the integration of MGTs and absorption chillers driven by waste digester gas of the wastewater treatment plants. It can meet the heating and cooling demands of the plants, which promote the reduction of utility costs. The technology presented is also useful for other thermal energy users.

The Power Reclamation of Utilizing Micro-Hydro Turbines in the Aeration Basins of Wastewater Treatment Plants

Hasan

Salem

Hadi

et al. 2020

Upgrading the aeration basin technology can improve the oxygen transfer efficiency (OTE) while keeping the energy consumption at its minimum level. Therefore, this paper introduces a new idea of installing micro propeller turbines in the aeration basin of a wastewater treatment plant (WWTP) to extract power from the high-velocity location in the water column. This extracted power can be used to operate a mixer at the top of the membrane to induce the mixing in that region, which will drive the less oxygenated wastewater into the water column. The rest of the extracted power will rotate microturbine rotors for electric power generation. By applying the proposed microturbines to the thirteen audited facilities, it was demonstrated to achieve a gross annual energy savings of 3,836,880 kWh, a gross yearly cost saving of $260,497, and total CO2 emissions that would be reduced of 2,714 metric tons/year. Generally, the addition of the proposed microturbines can save up to 15.7% of the annual plant electricity consumption (1.3% to 12.8% of the plant annual electricity bills).