Energy Efficiency, Generation and Recovery at Sydney Water

The 10th Making Cities Liveable Conference 2017 is coming to Brisbane on the 10-11th July.

Mr Peter Anders, Contract Services Manager at Sydney Water will be at this year’s conference, presenting “Energy efficiency, generation and recovery at Sydney Water”.

Sydney Water produces approximately 18% ($9 million/year) of its energy needs through renewable energy generation and reduces demand through energy efficiency measures. These results are achieved by Sydney Water’s drive to limit electricity grid imports to pre-1998 levels. Population increase as well as new processes, technology, more efficient and affordable equipment and increasing power and gas prices make meeting the target ever more complex.

Peter Anders

Since 2009, Sydney Water installed 15.2 MW biogas cogeneration, solar and hydro generation capacity and will further expand this portfolio. We will go beyond our commitment to keep energy purchases to pre-1998 levels if financially viable to do so. In doing so, we are always considering energy efficiency before renewable energy generation because it reduces site load instead of offsetting it. Since 2014, innovative ideas such as trucked food waste co-digestion have been introduced to increase biogas production for higher energy recovery rates.

To limit electricity grid imports, we created capacity of 9 MW biogas, 6 MW hydro and 0.16 MW solar generation. We also offset our site energy load through aeration improvements, LED technology, belt drive improvements, leakage removal and most open valve technology which saves around 20GWh/y.

A major part of our emissions minimisation effort is the continuous improvement of biogas production by trialling and implementing innovative technologies such as glycerol dosing, co-digestion of trucked organic waste and tests in bespoke mini digesters.

Our energy conservation and generation work continues across our renewable energy generation portfolio making cogeneration, hydro and solar installations more efficient, , increase of energy efficiency through site audits and continued co-digestion research to improve biogas yield.

High electricity and gas prices have increased and prioritised our energy and emissions reduction efforts. This benefits the community and our business.