52 WATER / WASTEWATER
Last but not least – a technology to look out for in future is the winning entry into the 2018 Melbourne ‘Emission Impossible’ innovation challenge, by Cranfi eld University and AECOM, who proposed an alternative treatment concept based on abiotic processes and anaerobic treatment which allegedly eliminates the production of Scope 1 emissions. The development and testing work has been held up by the pandemic, and we await an update on this exciting research.
And fi nally… Some ideas on how to get non-believers on board with achieving net zero, from Dr Steve Palmer and Dr Iris Soler:
• Compliance with reporting requirements for GHG emissions, to tie in with national and international GHG targets;
• Lay out the fact that we do not have a planet B;
• Reducing GHG emissions means improved resource effi ciencies and operational effi ciencies which lead to cost savings;
Figure 5: Results of applying a N2 O risk model to wastewater treatment processes in Land van Cuijk, Netherlands (© Jose Porros, 2021)
modelling software already used by Northumbrian Water and Bristol Water which enables them to monitor pressure to create calmer networks with fewer pressure transients and monitor networks to get early warning of events before they hit customers.
Another way to achieve pump optimisation and asset management is to install a ‘dynamic pump optimisation process’ which uses edge analytics on operational data. By tracking pump and network conditions, the system can detect anomalies like upstream and downstream blockages. The system can provide recommendations to operators for action needed or operate in fully automated mode directly triggering corrective actions. In
automatic mode it signifi cantly reduces hydraulic transients. There are now more than 100 of these systems installed in the US.
Fugitive GHG emissions (accidental and unintentional emissions e.g. leaks and diffuse escapes), can be measured using aeroplanes installed with laser gas measurement (Differential Absorption Lidar or DIAL) developed at the National Physical Laboratory, UK. This produces more precise measurement than satellite monitoring using nano satellites (GHG Sat) which only measure to the nearest 25m. Alternatively, the Scentroid DR2000 Flying Lab is a drone installed with an intelligent chemical analyser and a choice of up to 6 sensors (out of 40 available sensors), which can identify not only the levels of gases present but also their 3D location.
• Carbon pricing [polluter pays principle] will drive adoption of measures to GHG reduce emissions;
• The circular economy approach improves effi ciency, sustainability and resilience to risks;
• Engage with individuals and listen to their expertise on how improvements can be made;
• Need to embed a ‘net zero decision making’ mindset across the company so that everyone is working towards the same goal.
And a fi nal thought by Dr Palmer: “We really need policies to deliver national targets, for example regulation supporting the necessary transition for infrastructure – this would help to overcome barriers to investment that were identifi ed by the UK Committee on Climate Change.”
Rosa Richards is an Independent Environmental Consultant specialising in water policy and monitoring. She is Programme Manager of the Sensors for Water Interest Group (SWIG), and a freelance writer of science and technology. This article is based on a SWIG webinar held on 16 June 2021 on ‘Achieving net zero: how do we use monitoring for energy management?’
www.swig.org.uk
Author Contact Details Rosa Richards, Independent Environmental Consultant
• Bristol • Tel: 01934 830658 • Email:
rosapmrichards@gmail.com • Web:
https://www.linkedin.com/in/rosa-richards-7a515936/ Robust and
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