An advanced design of a grease trap system is on its pace

Our researcher in the Trinity Team, Dr Ajeet Pratap Singh, has been exploring various avenues by carrying out a series of assessment to come up with a hybrid grease trap (GT) integrated with a thermal recovery unit to harness the maximum potential amount of heat embedded in the wastewater. The hybridization will improve the grease removal efficiency of the GT and the new optimized design of the thermal recovery unit will harness a larger amount of energy from the wastewater inside the GT which has, so far, been flushed down the sewer.

He says: ’A high temperature gradient looks very fruitful for considerable thermal recapture. I am currently digging into every possible aspect to come up with innovative solutions and to seek the best opportunities to make a versatile device in a more economical way’.

The research approach involves experimental as well as computational methods in order to explore the concept in full. Based on the encouraging outcomes of the initial stages, it can be expected that the system’s ability to recover heat will result in lower energy demand for water heating by the primary heating unit (in most cases a boiler). This would also mean lower energy bills for domestic and industrial kitchens and commercial food services outlets, as well as reduced greenhouse gas emissions, where the main energy source is fossil-based.

These objectives well fit in with the EU Green Deal policy in which the wastewater sector is recognized as a vast source of renewable energy and its recovery certainly minimizes the net primary heating demands of various sectors.

Glimpses of the ongoing research: lab testing of the hybrid grease trap designs

Glimpses of the ongoing research: lab testing of the hybrid grease trap designs

Join us on 23 February 2021 at 2pm for a panelist discussion on heat recovery potential of leisure centres

Join us on 23 February 2021 at 2pm for a panelist discussion on

Heat recovery potential of leisure centres: opportunities, challenges, and risks

Description

Climate change poses significant challenges and the global community is not on track to meet sustainable development targets or the Paris Agreement to mitigate climate change. The Covid-19 pandemic and necessary government measures to curb the spread of the virus has put climate action on hold and shut down economies. The need for improved ventilation as an important mitigating factor against the risk of Covid-19 transmission has additional implications for costs and emissions for businesses.   

Leisure centres, as large users of water and energy, are faced with high operational costs and will also be generating significant emissions of greenhouse gases. However, heat recovery technology can yield very significant reductions in water and water-related energy demands and costs without impacting service quality and delivery. These reductions can be a promising response to the current challenges of climate change and post Covid-19 economic recovery.

To discuss energy demands in leisure centres and the important contributions to emissions and cost reductions that can be made through heat recovery, the Dŵr Uisce project (https://www.dwr-uisce.eu/) is hosting an expert panel discussion on heat recovery as one of the several ways these reductions can be made.

The panellists will be discussing a range of questions and some of the current opportunities, challenges, and risks associated with installing heat recovery in leisure centres in order to promote conversation and ideas on how leisure centres can take action that can save costs and improve their environmental footprint in the process.

Objectives

The objectives of the panel discussion are:

  •   To introduce our research on heat recovery in leisure centres to key stakeholders

  • To discuss possible options to these challenges of climate change and post Covid-19 economic recovery

  • To develop partnerships and a network of people working on reducing the operational costs and greenhouse gas emissions associated with leisure centres

Themes: Climate change, climate action, heat recovery, post Covid-19 recovery, sustainability

REGISTER HERE.

Mae'r newid yn yr hinsawdd yn cyflwyno heriau sylweddol ac nid yw’r gymuned fyd-eang ar y trywydd iawn i gyrraedd targedau datblygu cynaliadwy na Chytundeb Paris i liniaru'r newid yn yr hinsawdd. Mae pandemig Covid-19 a mesurau angenrheidiol y llywodraeth i leihau lledaeniad y feirws wedi golygu bod camau i weithredu o blaid yr hinsawdd yn cael eu gohirio a’r economi wedi dioddef yn enbyd. Mae’r angen am well awyru fel ffactor lliniaru pwysig yn erbyn y risg o drosglwyddo Covid-19 yn arwain at oblygiadau ychwanegol o ran costau ac allyriadau ychwanegol i fusnesau.  

Mae canolfannau hamdden, sy’n defnyddio llawer o ddŵr ac ynni, yn gyson yn wynebu costau gweithredu uchel ac maent yn gyfrifol am allyriadau sylweddol o nwyon tŷ gwydr. Fodd bynnag, gall technoleg i adfer gwres arwain at ostyngiadau sylweddol iawn yn y galw am ddŵr ac ynni sy’n gysylltiedig â dŵr, yn ogystal a chostau cysylltiedig heb effeithio ar ansawdd a darpariaeth y gwasanaeth. Gall y gostyngiadau hyn fod yn ymateb addawol i heriau presennol y newid yn yr hinsawdd ac adferiad economaidd ar ôl Covid-19.

I drafod gofynion ynni mewn canolfannau hamdden a’r cyfraniadau pwysig i allyriadau a lleihau costau y gellir eu gwneud drwy adfer gwres, mae prosiect Dŵr Uisce (https://www.dwr-uisce.eu/) yn cynnal trafodaeth banel arbenigol ar adfer gwres fel un o’r ffyrdd niferus y gellir gwneud y gostyngiadau hyn.

Bydd y panelwyr yn trafod amrywiaeth o gwestiynau ac yn rhoi sylw i rai o’r cyfleoedd, yr heriau a’r risgiau presennol sy’n gysylltiedig ag adfer gwres mewn canolfannau hamdden er mwyn hybu sgyrsiau am adnoddau a syniadau ynghylch sut gall canolfannau hamdden arbed costau a gwella eu ôl troed amgylcheddol yn y broses.

Amcanion trafodaeth y panel yw:

  • Cyflwyno ein ymchwil ar adfer gwres mewn canolfannau hamdden i randdeiliaid allweddol

  • I drafod camau posib fel atebion i’r heriau presennol y newid yn yr hinsawdd ac adferiad economaidd ar ôl Covid-19

  • Datblygu partneriaethau a rhwydwaith o randdeiliaid allweddol sy’n gweithio ar leihau allyriadau a chostau gweithredu sy’n gysylltiedig â chanolfannau hamdden

Themâu: Newid yn yr hinsawdd, gweithredu o blaid yr hinsawdd, adfer gwres, adfer ar ôl Covid-19, cynaliadwyedd

COFRESTRWCH YMA.

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Heat recovery potential of leisure centres

Opportunities, challenges, and risks

Free Dwr Uisce Sustainability Webinar Series 2021- Programme is out NOW!

We are pleased to let you know that the programme for the Sustainability Webinar Series 2021 is now available.

Three themes - four webinars to introduce you to research based practical solutions to improve energy efficiency in the water sector.

Click here to download the full programme. For more details on each webinar, read here.

Attendance is free. Tickets can be reserved on line here:

https://www.eventbrite.ie/o/dwr-uisce-project-32064856741

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Press Release

Funds saved by energy recovery technology donated to the charity Wells of Life Ireland

Tuesday December 8th 2020 was a cold but sunny day in Rathnure, Co. Wexford. It was also the day members of the Dwr Uisce Team, Blackstairs Group Water Scheme, National Federation of Group Water Schemes, and staff of EPS Water were waiting to mark a number of great achievements.

Photo: Pump as Turbine at the inlet of the raw water tank at Blackstairs WTP

Photo: Pump as Turbine at the inlet of the raw water tank at Blackstairs WTP

The micro-hydropower energy recovery system at Blackstairs Group Water Scheme (GWS) Water Treatment Plant has been in operation for over a year. Installed to recover energy by means of a ‘pump as turbine’ (PAT), it was to produce electricity at significantly lower cost than conventional turbines. It was also to reduce the carbon footprint of the water supply scheme and generate monetary savings. That is what has happened! Over the past 12 months, the PAT has produced almost 15,600 kWh of electricity, corresponding to 3.6 tonnes CO2 equivalent and €2037 saved!

Thinking differently, the Blackstairs GWS Committee and EPS Group decided that the funds saved by the energy recovery installation would be donated to a charity. The charity of choice is called Wells of Life Ireland. Its mission is to provide financial and technical support for drilling and reconditioning community water wells in rural Uganda.

Ms Dympna Skelton, Blackstairs GWS General Manager, explained: ‘When the idea came to donate to a charity we chose another water focused organisation. It is great to extend the positive results achieved by the Dŵr Uisce project by helping people in another part of the globe. It enhances our own mission of providing clean safe water to the community’.

On the occasion, Jerome O’ Sullivan (Group Energy Manager of EPS) on behalf of Blackstairs GWS, handed over the cheque for the sum of €2037 to Mr. Aidan Jordan, Operations Manager of Wells of Life Ireland.

Photo: Official handover of the cheque.  (Left to right, front row: Mr Jerome O’ Sullivan EPS, Mr Aidan Jordan, Wells of Life Ireland, and Ms Dympna Skelton Blackstairs GWS; back row: Prof Paul Coughlan, TCD, Mr. Padraic Dunne, EPS, Mr David Logue,…

Photo: Official handover of the cheque. (Left to right, front row: Mr Jerome O’ Sullivan EPS, Mr Aidan Jordan, Wells of Life Ireland, and Ms Dympna Skelton Blackstairs GWS; back row: Prof Paul Coughlan, TCD, Mr. Padraic Dunne, EPS, Mr David Logue, EPS, Prof Aonghus McNabola TCD, Ms Roisin Dowd Smith, NFGWS, Mr Oliver Neville, Blackstairs GWS, Mr. Mike Reddy, Blackstairs GWS Committee, and Mr Benny McDonagh, LIT)

When asked about how the funds will be used, Mr Jordan said: ‘The amount we received today corresponds to two thirds of what is needed to recondition an old well in a rural community in Uganda that will provide 20 years of fresh water for 1000 people’.

Trinity Professor, Aonghus McNabola highlighted the important role played by the positive responses given by all stakeholders throughout the duration of the project from idea conception to implementation and ongoing management of the energy recovery system. He said: ‘A single ‘NO’ to the idea would have made all of this impossible; all parties have fully supported the Dŵr Uisce energy recovery project from the start. It is a great example of collaboration and partnership between industry, community and academia to achieve real sustainable technology innovation for the water sector’.

In expressing his appreciation for the achievement, Trinity Professor, Paul Coughlan said: “The initiative demonstrates mission extension in action. We see a non-profit community water organisation extending the geographical boundary of its mission to support a charity bringing safe drinking water to a community in another part of the globe”.

The Blackstairs Group Water Scheme Pump-As-Turbine Pilot plant and the development of the technology and design software on which it relies was funded by the Interreg Ireland Wales Programme 2014-2020 through the Dŵr Uisce Project.

Exploring the relationship between economic growth and the environment

The goal of all nations is to achieve sustainable economic development. With economic development comes increase in production which has an impact on energy use of the country. Higher economic output has resulted in higher energy consumption thus increasing emissions. Richer countries, however, have more resources available to invest in energy effect technologies to reduce their environmental imprint. We investigated the relationship between economic growth and the environment for 26 EU countries, using the hypothesis postulated for the Environmental Kuznets Curve (EKC), which assumes an inverted-U shape relationship between economic growth and environment.

The goal of all nations is to achieve sustainable economic development. Energy sources and their use in production processes have had a great impact on a country’s economic growth. The knowledge of a relation between economic growth and the environment is considered to be extremely important for effective strategy development with regards to environment and energy that support sustainable development. Thus, the relationship between energy use and economic growth has been examined in detail; however contradictory results appear in the literature (Doğan et al., 2020).

Kraft and Kraft (1978) were amongst the first researchers to explore the relationship between economic growth and energy use. The connection between economic growth and energy use presented with four hypothesis: first, the growth hypothesis assumed that increasing the use of energy would increase economic development. The hypothesis stated that economic growth increased with increased energy consumption as the energy consumption could be taken as an indicator of its usage in production process implying increase in production output (Kraft and Kraft, 1978, Bowden and Payne, 2010). The second hypothesis, conservation hypothesis, assumed that energy consumption was determined by economic growth (Abosedra and Baghestani, 1989). The third hypothesis is of feedback where a bidirectional relation exists between energy and economic growth (Shahbaz et al., 2020). The last hypothesis is of neutrality where no relationship between the two exists (Soytas et al., 2007).

The four different hypothesis that link energy use and economic growth indicate that the notion of ‘one size fits all’ does not apply. The relationship between the two has been described though Environmental Kuznets Curve (EKC). The curve took the form of inverted U-shape between economic growth and environmental pressures. The EKC hypothesis stated that the emissions are expected to rise with economic growth until a certain point is reached after which the improvement in economic growth lead to an improvement in the environment.

Different indicators have been used to measure environmental pressure and economic growth. Taking the example of 26 EU countries, we measured energy consumption per capita as a proxy for environmental pressure as emissions are directly related to energy use. The variable of GDP per capita was taken as a proxy for economic growth.

Figure 1 plots the GDP per capita for 26 EU countries from 2010 to 2018 against energy use per capita. We used the EU 26 countries in aims to test the hypothesis of Environmental Kuznets Curve (EKC) was tested for the 26 EU countries. The visual representation shows that there is as presence of inverted-U shaped curve though it is slightly left-skewed.

Figure 1: The Environmental Kuznets Curve (EKC)

Figure 1: The Environmental Kuznets Curve (EKC)

This suggested that as the countries experience economic growth, the deterioration of environment decreases and becomes less of an issue. The improvement in economic growth of a country is a generally a result of an increase in economic activity which leads to environmental degradation due to energy use. As the countries become richer, their environmental awareness increases and so does the demand for environmental regulations. Richer countries are also willing to invest more in R&D to develop energy efficient technologies that limit the use of dirty fuel and promote clean energy.

However, using GDP per capita as a single proxy of economic growth cannot accurately reflect the differences and disparity amongst the countries. Even countries on the same level of economic development can have different production processes through interaction of different inputs. Thus, a country’s overall economic growth is not only depended on its production output but also by other factors such as infrastructure, education, health, energy structure and urbanization. So, to further understand the relationship between economic growth and environmental pressures for the 26 sample EU countries, future research needs to be carried out to understand the diversity among countries.

References:

ABOSEDRA, S. & BAGHESTANI, H. 1989. NEW EVIDENCE ON THE CAUSAL RELATIONSHIP BETWEEN UNITED STATES ENERGY CONSUMPTION AND GROSS NATIONAL PRODUCT. The Journal of Energy and Development, 14, 285-292.

BOWDEN, N. & PAYNE, J. E. 2010. Sectoral Analysis of the Causal Relationship Between Renewable and Non-Renewable Energy Consumption and Real Output in the US. Energy Sources, Part B: Economics, Planning, and Policy, 5, 400-408.

DOĞAN, B., BALSALOBRE-LORENTE, D. & NASIR, M. A. 2020. European commitment to COP21 and the role of energy consumption, FDI, trade and economic complexity in sustaining economic growth. Journal of Environmental Management, 273, 111146.

KRAFT, J. & KRAFT, A. 1978. On the Relationship Between Energy and GNP. The Journal of Energy and Development, 3, 401-403.

SHAHBAZ, M., SHAFIULLAH, M., KHALID, U. & SONG, M. 2020. A nonparametric analysis of energy environmental Kuznets Curve in Chinese Provinces. Energy Economics, 89, 104814.

SOYTAS, U., SARI, R. & EWING, B. T. 2007. Energy consumption, income, and carbon emissions in the United States. Ecological Economics, 62, 482-489.

Product Environmental Footprint (PEF) – How the EU is harmonising LCA to help consumers decide

In October, Isabel participated in the online training on the Product Environmental Footprint (PEF).

The PEF has been initiated by the European Commission to establish more detailed and harmonised guidelines for conducting a Life Cycle Assessment (LCA). The objective is to make environmental footprints undertaken by different practitioners more comparable across products. The guidelines reduce the number of decisions that need to be taken by the LCA practitioner, reducing the scope for error and value judgement: which processes and steps of the life cycle of the product do I take into account? Where shall I source production data such as input material or energy from? How do I analyse the results in order to find all relevant environmental hotspots? The PEF gives answers.

In order to shed light on the jungle of PEF rules, PRé consultants - the developers of the modelling software SimaPro - organised a one week training course. Participants learned about the guidelines established so far and ongoing discussions, as PEF is still under development. Most likely PEF will become a compulsory methodology for companies who want to certify the environmental performance of their products to consumers in Europe. We will then be able to judge which beer or T-shirt is the more environmentally responsible choice.

Even if practitioners choose not to conduct an official, certified PEF, many of the specific PEF guidelines may be adhered to out of simple good LCA practice. Following this week long course, Isabel has developed new ideas on how to refine her current and future LCA studies. Last but not least, she learned new tricks in the use of SimaPro software.

Thanks to our funders for supporting Isabel’s participation in the training. Also thanks to the great instructors Laura Golsteijn and Marisa Vieira and all participants for a very interactive and fun workshop!

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Water footprint of whisky - Isabel at the LCA Food 2020 online conference

Isabel presented the results of the water footprint of single malt whisky at the LCA Food 2020 conference in mid of October. How much water is used for producing whisky in a craft distillery in Scotland? How can this water footprint be reduced? And what is the smartest way to use the valuable by-products, from a water perspective? These and other questions were answered in her poster presentation.

Held virtually from Berlin, this very well organised online event allowed for a lot of interactivity! Chat functions, breakout rooms with random researcher peers from around the world, a virtual photo booth, a pub quiz (you had to bring your own beer) and live forum discussions made it almost feel like a personal face-to-face meetup. No need to run after an author at the lunch buffet for asking a question – this could be done at any time by leaving a comment underneath the pre-recorded presentation. As registered participants can still watch all presentations for more than a month, no presentation has to be missed – as often in a normal conference where events are being held in parallel. You missed a detail on the slide? No problem, just pause and go back.

Researchers leaving comments for Isabel’s poster stated their surprise over cooling water being the main water use hotspot in the distillery. Indeed, this is common for many distilleries. But heat recovery and a (partially) closed cooling water loop offer interesting solutions, which is the topic of Isabel’s current research. In terms of by-product use, it seems to be most (water) efficient to use spent grain and pot ale for the replacement of imported protein feed such as soybean meal to be fed to livestock. Have a look at her poster below if you are interested in finding out more!

Many thanks go to Arbikie distillery for the fruitful collaboration and the funders of the Dwr Uisce project for supporting Isabel’s participation in the conference!

Isabel’s poster, presented at LCA Food 2020: What are the water use hotspots in whisky distilling and how can we reduce the whisky’s water footprint?

Responding to the UN Sustainability Development Goals in Collaboration

By Katrin Dreyer-Gibney

Since my involvement with the European Dŵr Uisce research project I don’t think I have enjoyed a task more than coordinating the paper and presentation for the EURAM  2020 Conference, which will take place in the Trinity Business School, Trinity College Dublin from the 4th to 6th December 2020.

The overall Conference Theme is “The Business of Now: the future starts here”

Our paper deals with this theme as it addresses some of the biggest problems of “Now” and what businesses can do to address these problems for the future.

The paper is called “Responding to the UN Sustainability Goals through network action learning” - It explores how we – a cross-border, multidisciplinary team contribute to novel technology platforms, policy support and guidance and knowledge dissemination in collaboration with practitioners, government and community representatives.

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WP8_Blackstairs Dwr Uisce Team cropped.JPG

Sustainability Development as a Wicked Problem

The UN Sustainability Goals challenge society to consider how it is behaving and to respond with new partnerships to sustain our communities, resources and planet. The scale and scope of this challenge is enormous and not amenable to single discipline actions, nor to actions which do not integrate research and practice. A challenge like this can be described as a “wicked problem”.

A wicked problem has countless causes, is hard to describe, and doesn’t have a right answer, climate change, war and poverty are classic examples of wicked problems. They are the opposite of hard but ordinary problems, which people can solve in a finite time period by applying standard techniques. Not only do conventional processes fail to tackle wicked problems, but they may exacerbate situations by generating undesirable consequences.

Wicked problems are amenable to action learning, where different people can advocate alternative courses of action in accordance with their own value systems, past experience and intended outcomes.

In our EURAM conference paper we present a particular response to the UN Sustainability Goals undertaken through network action learning. The problem setting is that of the creative application of novel technology with the potential to reduce the carbon footprint associated with water distribution and use. Increasingly, water, where available, is not in the right place at the right time. That is a well-recognised problem with implications for food production and human habitation. However, a less well recognised related problem is that the energy burden associated with water production and distribution is substantial. Treating raw water and wastewater to acceptable standards for consumption and disposal is energy intensive. Such activity accounts for 2–3% of the global energy use. Therefore, initiatives to reduce that energy burden have the potential to reduce the carbon footprint and sustain water as a resource.

We explore how network action learning impacts the application of novel technology to reduce the energy burden associated with water production and distribution and how, through learning in action, innovation capabilities are developed.  We combine research and project practices, to enable the timely production of valid, actionable knowledge and innovative solutions.

By doing so, we address the following UN sustainability goals:
Goal 6: Clean water and sanitation
Goal 7: Affordable and clean energy
Goal 9: Industry, innovation and infrastructure
Goal 11: Sustainable cities and communities
Goal 12: Responsible consumption and production
Goal 13: Climate action
Goal 17: Partnerships for the goals

Humanity is facing enormous challenges through climate change and water shortage.  These related problems cannot be solved in isolation. As shown in our research, a holistic approach can respond these problems and the associated UN Sustainability Goals. This study illustrates how a cross-border, multidisciplinary team of researchers working with practitioners from industry and governments addressed these challenges. The project continues for a further two years during which our further research will enquire into the diffusion of the innovations resulting from this study.

Reference:
Dreyer-Gibney, K., Coughlan, P., Coghlan, D., Wu, S.-H., Bello-Dambatta, A., Dallison, R., McNabola, A., Novara, D., Rafique, A., Schestak, I., Spriet, J., Walker, N., & Williams, P. 2020. Responding to the UN Sustainability Goals through network action learning. Paper to be presented at the EURAM 2020, Dublin.

 

Evaluating the potential for energy recovery in an industrial wastewater treatment plant

by Daniele Novara

Dairygold Co-Operative Society Ltd is an Irish dairy co-operative based in Mitchelstown, County Cork. A delegation from the Dŵr Uisce project visited the Dairygold Wastewater Treatment Works (WWTP) on 20/02/2020 to assess the potential for hydraulic energy recovery within the existing infrastructure.

In fact, Micro-hydropower schemes are an effective solution for energy recovery at the outfall of wastewater treatment plants and Pumps As Turbines (PATs) in particular are a hydropower technology particularly suitable on a small scale where a conventional turbine unit would not be economically viable.

The Dairygold WWTP is located at the foot of a hill just below the main industrial facilities, and next to the Mitchelstown municipal WWTP as shown in Figure 1. The main location investigated for energy recovery was the pipeline carrying pre-treated effluents from the industrial plant above head to the WWTP at the foot of the hill with a drop of around 12 m displayed in Figure 2. At the first step, flow and pressure data were gathered from the plant operators to provide a precise overview of the site conditions. Subsequently, the Pump As Turbine selection software developed at Trinity College Dublin as part of Dŵr Uisce research project has been applied to the selected site and helped to identify the ideal PAT and generator to be chosen.

Figure 1 the location of Dairygold Wastewater Treatment Works (WWTP)

Figure 1 the location of Dairygold Wastewater Treatment Works (WWTP)

Figure 2 the pipeline carrying pre-treated effluents

Figure 2 the pipeline carrying pre-treated effluents

Eventually, the potential for energy recovery within the existing infrastructure of the Dairygold WWTP in Mitchelstown has been identified as 2 kW. The turbine may recover up to 7,400 kWh of electricity along a typical year, corresponding to a reduction of the electricity bill by nearly 1,200 €/year. However, given the low power output of the PAT the estimated payback time is between 11 and 14 years.