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

2020 ◽  
Vol 143 (8) ◽  
Author(s):  
Alaa Hasan ◽  
Abdel Rahman Salem ◽  
Ahmad Abdel Hadi ◽  
Mohammad Qandil ◽  
Ryoichi S. Amano ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Column ◽  
Energy Savings ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Electricity Consumption ◽  
Oxygen Transfer Efficiency ◽  
Annual Cost Saving ◽  
Hydro Turbines ◽  
Extracted Power

Abstract 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 13 audited facilities, it was demonstrated to achieve a gross annual energy-savings of 3,836.9 MWh, a gross annual cost-saving of $260,497, and total CO2 emissions that would be reduced by 2,714 metric tons/year. Generally, the addition of the proposed microturbines can save up to 15.7% of the annual plant electricity consumption (1.3–12.8% of the plant annual electricity bills).

Utilization of Hydro-Turbines in Wastewater Treatment Plants (WWTPs)

2018 ◽  
Author(s):  
Ahmad I. Abbas ◽  
Mohammad D. Qandil ◽  
Muhannad R. Al-Haddad ◽  
Mandana S. Saravani ◽  
Ryoichi S. Amano
Keyword(s):  
Wastewater Treatment ◽  
Flow Rate ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Optimal Choice ◽  
High Flow ◽  
High Flow Rate ◽  
Hydro Turbine ◽  
Hydro Turbines

Wastewater treatment plants (WWTPs) are a significant energy consumer, yet there are several opportunities of implementing on-site power generation systems. Within the treatment process, the high flow rate of effluent is produced and discharged to a nearby water body by gravity. Thus, hydro turbines can be utilized to generate power in such application due to a difference in elevation and high flow rate. This paper presents a case study of introducing a hydro turbine in wastewater treatment plant in Wisconsin and evaluating the power output in addition to determining the energy savings. The wastewater treatment plant considered in this study has an effluent flow rate of 190 MGD (million gallons per day) and elevation difference of 3 meters (10 feet) between the final stage of treatment and the discharge point. Based on the aforementioned parameters; hubless rim-drive Kaplan type hydro turbine (RDT) is the optimal choice to be used in such application. The RDT is designed and optimized by using in-house code. A computational fluid dynamics (CFD) software is applied to evaluate the performance of the proposed model, and the system is simulated through HOMER software to validate the results generated by the CFD. The expected savings is estimated to be 1,564 MWh/year.

scholarly journals Biogas, Solar and Geothermal Energy—The Way to A Net-Zero Energy Wastewater Treatment Plant–A Case Study

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6898
Author(s):  
Sylwia Myszograj ◽  
Dariusz Bocheński ◽  
Mirosław Mąkowski ◽  
Ewelina Płuciennik-Koropczuk
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Renewable Energy Sources ◽  
Treatment Plant ◽  
Electricity Consumption ◽  
Photovoltaic System ◽  
Conventional Activated Sludge ◽  
Net Zero ◽  
Energy Optimisation

Wastewater treatment plants designed to meet the requirements of discharging wastewater to a receiving water body are often not energy optimised. Energy requirements for conventional activated sludge wastewater treatment plants are estimated to range from 0.30 to 1.2 kWh/m3, with the highest values achieved using the nitrification process. This article describes the energy optimisation process of the wastewater treatment plant in Gubin (Poland) designed for 90 000 PE (population equivalent) using renewable energy sources: solar, biogas, and geothermal. At the analysed wastewater treatment plant electricity consumption for treating 1 m3 of wastewater was 0.679 kWh in 2020. The combined production of electricity and heat from biogas, the production of electricity in a photovoltaic system, and heat recovery in a geothermal process make it possible to obtain a surplus of heat in relation to its demand in the wastewater treatment plant, and to cover the demand for electricity, with the possibility of also selling it to the power grid.

scholarly journals Energy saving in wastewater treatment plants

2020 ◽  
Vol 212 ◽  
pp. 01003
Author(s):  
Natalia Ciobanu
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Wastewater Treatment Plant ◽  
Energy Recovery ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Electricity Consumption ◽  
Electricity Cost ◽  
Starting Point ◽  
Sludge Cake

This paper uses data from the Chisinau Wastewater Treatment Plant (WWTP) (2018 year) to analyze the potential for energy recovery from wastewater treatment plant via anaerobic digestion with biogas utilization with electricity generation. These energy recovery strategies could help offset the electricity consumption of the wastewater treatment plants and represent possible areas for sustainable energy policy implementation. We estimate that anaerobic digestion could save approximately 14, 444, 918 kWh annually in Chisinau WWTP. Anaerobic digestion is widely considered as an environmentally friendly technology for sewerage sludge. This study aims to highlight the potential as well as to provide a starting point for further studies regarding the treatment as sewerage sludge using anaerobic digestion in Republic of Moldova and recovery energy that could further reduce electricity cost and reduction of sludge cake.

scholarly journals Energy consumption in anaerobic and aerobic based wastewater treatment plants in Italy

2021 ◽  
Author(s):  
Ezio Ranieri ◽  
Silvia Giuliano ◽  
Ada Cristina Ranieri
Keyword(s):  
Wastewater Treatment ◽  
Energy Consumption ◽  
Anaerobic Digestion ◽  
Energy Demand ◽  
Energy Savings ◽  
Wastewater Treatment Plants ◽  
Electricity Consumption ◽  
Consumption Data ◽  
Urban Wastewater Treatment ◽  
Aerobic And Anaerobic

Abstract The aim of this study is to carry out an experimental investigation on electricity consumption in wastewater treatment plants in Italy based on aerobic and anaerobic digestion wastewater treatment plants (WWTP). The data refer to plants managed by two major water resources management companies in Italy, Hera and Acquedotto Pugliese (AQP). The survey makes use of statistical tools for data analysis of 202 urban wastewater treatment plants. In order to extend the reliability of the survey, electricity consumption data were analysed through three specific energy demand indicators: kWh/m3, kWh/PE•year, kWh/kgCODremoved referred to each plant. The results show that anaerobic systems are advantageous in terms of electricity consumption per m3 as they achieve more than 50% saving with values ranging from 1.02 kWh/m3 for aerobic plants, instead of 0.43 kWh/m3 for the anaerobic ones. Differences have been found in terms of anaerobic digestion efficiency between the data concerning the plants in northern Italy – Hera Company with an average of 0.33 kWh/m3- and those in Apulia – AQP company with an average of 0.53 kWh/m3. Aerobic systems showed more energy consumption also for HERA managed WWTP. If anaerobic digestion were implemented on all the AQP WWTP energy savings should be of approximately. 16% and approximately. 42% if related to HERA anaerobic based WWTP average performance.

One-Year Operational Data for Wiconisco Wastewater Treatment Plant Illustrating Process Improvements and Carbon Footprint Reduction with SolarBee® Circulators

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Archis Ambulkar ◽  
Stephen N. Zeller ◽  
Douglas Klinger
Keyword(s):  
Wastewater Treatment ◽  
Carbon Footprint ◽  
Wastewater Treatment Plant ◽  
Energy Savings ◽  
Treatment Plant ◽  
Electricity Consumption ◽  
Cost Savings ◽  
Residual Chlorine ◽  
Process Improvements ◽  
Carbon Footprint Reduction

In 2008, Brinjac Engineering Inc., retained municipal engineer for Wiconisco Township wastewater treatment plant (WWTP), assisted the Township with obtaining Growing Greener II Innovative Wastewater Treatment Grant Award for $84,000 to reduce treatment plant carbon footprint. With this prime objective and considering other aerators related operational issues, the plant was upgraded with new solar circulators/aerators in March'09, with one (1) solar unit installed in Lagoon # 1 and two units (2) in Lagoon # 2. Four (4) of the existing eight (8) aerators were continued to use as backup for these solar units. With these upgrades, the WWTP process changed from aerated lagoons to a system resembling towards an advanced facultative system. System performance was analyzed prior to and after upgrades. During the one (1) year of WWTP operations after upgrades (Mar'09–Feb'10 period), it was in full compliance with NPDES effluent permit. The WWTP influent data indicated that hydraulic and organic loadings remained consistent prior to and after upgrades (Jan'08–Feb'10 period). Average daily effluent BOD5 and TSS were 5.4 mg/l and 29.2 mg/l respectively before upgrades, whereas they were 6.5 mg/l and 18.6 mg/l respectively after upgrades indicating improvements in TSS removal. Average monthly fecal coliform between Jan'08–Mar'09 period was 16 mg/l (prior to upgrades) whereas it averaged at 5.5 mg/l after upgrades reflecting better coliform treatment. Other parameters including D.O., pH and residual chlorine remained within permit limits. Sludge depths in lagoons # 1 and # 2 decreased by approx. 2.50 ft and 0.50 ft respectively after upgrades. In 2009, the SolarBee® units reduced algae sufficient enough that no biological additives were needed for its control, resulting in an annual saving of more than $5,000. Apart from process improvements, monthly electricity consumption and electric bills at WWTP decreased by about 47% and 32% respectively after upgrades. Some additional cost savings were compensated due to increase in unit electric costs. During Jan'08–Feb'10 period, Chapter 94 Reports did not indicate for any significant modifications at WWTP other than Solar system upgrades that would result in major changes to electricity consumption. Hence, energy savings were considered to be directly related to these upgrades. With energy savings, carbon footprint of WWTP decreased by 47%. Process improvements at the WWTP were consistent with experiences from previous case studies. Overall, solar units provided efficient circulation and mixing in lagoons while maintaining aerobic conditions necessary for treatment and served as a suitable option for process improvements, minimizing energy costs, carbon footprint reduction and meeting permit limits.

Analysis and balance of phosphorous removal from wastewater at urban wastewater treatment plant

2020 ◽  
Vol 15 (2) ◽  
pp. 142-151
Author(s):  
Peter Lukac ◽  
Lubos Jurik
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Phosphorus Recovery ◽  
Anaerobic Sludge ◽  
Biological Phosphorus Removal ◽  
The Mean

Abstract:Phosphorus is a major substance that is needed especially for agricultural production or for the industry. At the same time it is an important component of wastewater. At present, the waste management priority is recycling and this requirement is also transferred to wastewater treatment plants. Substances in wastewater can be recovered and utilized. In Europe (in Germany and Austria already legally binding), access to phosphorus-containing sewage treatment is changing. This paper dealt with the issue of phosphorus on the sewage treatment plant in Nitra. There are several industrial areas in Nitra where record major producers in phosphorus production in sewage. The new wastewater treatment plant is built as a mechanicalbiological wastewater treatment plant with simultaneous nitrification and denitrification, sludge regeneration, an anaerobic zone for biological phosphorus removal at the beginning of the process and chemical phosphorus precipitation. The sludge management is anaerobic sludge stabilization with heating and mechanical dewatering of stabilized sludge and gas management. The aim of the work was to document the phosphorus balance in all parts of the wastewater treatment plant - from the inflow of raw water to the outflow of purified water and the production of excess sludge. Balancing quantities in the wastewater treatment plant treatment processes provide information where efficient phosphorus recovery could be possible. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. The mean daily value of P tot is approximately 122.3 kg/day of these two sources. There are also two outflows - drainage of cleaned water to the recipient - the river Nitra - 9.9 kg Ptot/day and Ptot content in sewage sludge - about 120.3 kg Ptot/day - total 130.2 kg Ptot/day.

Sludge minimization by disintegration at different wastewater treatment plants

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Luchien Luning ◽  
Paul Roeleveld ◽  
Victor W.M. Claessen
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
New Technologies ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Biological Degradation ◽  
Ongoing Research ◽  
Sludge Minimization

In recent years new technologies have been developed to improve the biological degradation of sewage sludge by anaerobic digestion. The paper describes the results of a demonstration of ultrasonic disintegration on the Dutch Wastewater Treatment Plant (WWTP) Land van Cuijk. The effect on the degradation of organic matter is presented, together with the effect on the dewatering characteristics. Recommendations are presented for establishing research conditions in which the effect of sludge disintegration can be determined in a more direct way that is less sensitive to changing conditions in the operation of the WWTP. These recommendations have been implemented in the ongoing research in the Netherlands supported by the National Institute for wastewater research (STOWA).

Planning Replicable Small Flow Wastewater Treatment Facilities in Developing Nations

1993 ◽  
Vol 28 (10) ◽  
pp. 1-8 ◽  
Author(s):  
A. Gaber ◽  
M. Antill ◽  
W. Kimball ◽  
R. Abdel Wahab
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Local Development ◽  
Treatment Plant ◽  
Development Program ◽  
The United States ◽  
Appropriate Technology ◽  
Funding Agency ◽  
Small Scale ◽  
Technology Choice

The implementation of urban village wastewater treatment plants in developing countries has historically been primarily a function of appropriate technology choice and deciding which of the many needy communities should receive the available funding and priority attention. Usually this process is driven by an outside funding agency who views the planning, design, and construction steps as relatively insignificant milestones in the overall effort required to quickly better a community's sanitary drainage problems. With the exception of very small scale type sanitation projects which have relatively simple replication steps, the development emphasis tends to be on the final treatment plant product with little or no attention specifically focused on community participation and institutionalizing national and local policies and procedures needed for future locally sponsored facilities replication. In contrast to this, the Government of Egypt (GOE) enacted a fresh approach through a Local Development Program with the United States AID program. An overview is presented of the guiding principals of the program which produced the first 24 working wastewater systems including gravity sewers, sewage pumping stations and wastewater treatment plants which were designed and constructed by local entities in Egypt. The wastewater projects cover five different treatment technologies implemented in both delta and desert regions.

Energy Savings at Phoenix 23rd Avenue Wastewater Treatment Plant Using Feed-Forward Process Control

2009 ◽  
Vol 2009 (13) ◽  
pp. 3722-3729 ◽  
Author(s):  
Thomas Walz ◽  
J.R. Coughenour ◽  
Kevin Williams ◽  
John Jacobs ◽  
Larry Shone ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Process Control ◽  
Wastewater Treatment Plant ◽  
Energy Savings ◽  
Treatment Plant ◽  
Feed Forward ◽  
Forward Process

scholarly journals Aerial Mapping of Odorous Gases in a Wastewater Treatment Plant Using a Small Drone

2021 ◽  
Vol 13 (9) ◽  
pp. 1757
Author(s):  
Javier Burgués ◽  
María Deseada Esclapez ◽  
Silvia Doñate ◽  
Laura Pastor ◽  
Santiago Marco
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Principal Component ◽  
Hazardous Air Pollutants ◽  
Sampling System ◽  
Aerial Mapping ◽  
Sensor Signals ◽  
Current Monitoring ◽  
Flexible Tubes

Wastewater treatment plants (WWTPs) are sources of greenhouse gases, hazardous air pollutants and offensive odors. These emissions can have negative repercussions in and around the plant, degrading the quality of life of surrounding neighborhoods, damaging the environment, and reducing employee’s overall job satisfaction. Current monitoring methodologies based on fixed gas detectors and sporadic olfactometric measurements (human panels) do not allow for an accurate spatial representation of such emissions. In this paper we use a small drone equipped with an array of electrochemical and metal oxide (MOX) sensors for mapping odorous gases in a mid-sized WWTP. An innovative sampling system based on two (10 m long) flexible tubes hanging from the drone allowed near-source sampling from a safe distance with negligible influence from the downwash of the drone’s propellers. The proposed platform is very convenient for monitoring hard-to-reach emission sources, such as the plant’s deodorization chimney, which turned out to be responsible for the strongest odor emissions. The geo-localized measurements visualized in the form of a two-dimensional (2D) gas concentration map revealed the main emission hotspots where abatement solutions were needed. A principal component analysis (PCA) of the multivariate sensor signals suggests that the proposed system can also be used to trace which emission source is responsible for a certain measurement.

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