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Energy Efficiency in the South African Water Industry: A Compendium of Best Practices and Case Studies
Expanded Title:Energy will in future become a high cost item for municipalities and utilities which operate and maintain water and wastewater processes. Energy consumption will continue to increase as more people are provided with water and sanitation and new technologies are implemented to meet stricter effluent and potable water quality requirements. To position the water sector globally with regard to energy consumption, the Global Water Research Coalition (GWRC) embarked on a project entitled Energy Efficiency in the Water Industry: A Compendium of Best Practices and Case Studies, which looks at these best practices worldwide. The project is supported by the GWRC partners world-wide as represented by the four Continental Coordinators in Australasia (Australia and Singapore), Europe, South Africa and the USA. Each continental group created a report of best examples submitted by utilities in their region. The four continental reports, when available, will be compiled into the global compendium. The report by the UK Water Industry Research Ltd. (UKWIR, 2010) on energy efficiency in the UK water and wastewater sector concluded that overall energy efficiency gains of between 5 and 15% may be achieved, with up to 25% energy efficiency improvement in wastewater treatment processes (mainly activated sludge processes).The report further indicated that renewable energy, mainly in the form of combined heat and power (CHP) from sludge gas, could contribute significantly to the net energy demand of the water industry. A similar report was compiled by the Water Environment Research Foundation (WERF, 2010) in the USA, and provides best practices for the energy efficient operation of wastewater industry assets in North America. The Water Research Commission of South Africa (WRC), as partner of the GWRC, has funded the current project to develop a Compendium for the South African water industry. The scope of work covered the principal activities of water and wastewater businesses and focused on the identification of current best practice, tools and technologies. The study evaluated both incremental improvements in energy efficiency through optimisation of existing assets and operations, and substantial improvements in energy efficiency from the adoption of new technologies. It also highlighted new processes, plant types and systems, which realise more substantial energy gains. Water and wastewater treatment plant surveys were conducted to document case studies and examples of best practice.
Date Published:01/06/2013
Document Type:Research Report
Document Subjects:Wastewater Management - Domestic
Document Keywords:Municipality
Document Format:Report
Document File Type:pdf
Research Report Type:Technical
WRC Report No:TT 565/13
ISBN No:978-1-4312-0430-4
Authors:Swartz CD; van der Merwe-Botha M; Freese SD
Project No:5/2092//3
Organizations:Chris Swartz Water Utilisation Engineers; Waterscience CC; Water Group Holdings (Pty) Ltd
Document Size:1 339 KB
Attachments:SA-AM2 - Amatola - Water Reverse Osmosis Energy Recovery System.docx
SA-CT2 - Tshwane - Submersible vs self-priming pumps.docx
SA-CT3 - Pretoria - Mini hydro-power generation in water distribution systems.docx
SA-EM1 - Durban - Pressure reduction management.docx
SA-EM2 - Durban - Pumping scheme arrangements.docx
SA-EM3 - Durban - Life-cycle assessment.docx
SA-EM4 - Durban - Water distribution optimisation.docx
SA-EM5 - Ethekwini - Biogas energy production.docx
SA-EM6 - Ethekwini - Mini hydropower generators.docx
SA-EM7 - Ethekwini - Western Aquaduct.docx
SA-EMF - Emfuleni - Leakage reduction and water conservation.doc
SA-EMF1 - Emfuleni - Prepayment metering and fixtures.doc
SA-ERWAT - Erwat - Diffused-air injection.doc
SA-JW1 - Jhb Water - Aeration blower efficiency.docx
SA-JW2 - Jhb Water - Fine-bubble aeration.docx
SA-JW3 - Jhb Water - Anaerobic digester mixing (vertical mixer).docx
SA-JW4 - Jhb Water - Solar heating and composting.docx
SA-JW5 - Jhb Water - CHP biogas from sludge digestion.doc
SA-JW6 - Jhb Water - Cost-benefit model for biogas production.docx
SA-KAG - Kagiso -Prepayment metering and pressure management.doc
SA-KZN - Durban - Off-peak pumping.docx
SA-OM - Overstrand - SBR system.docx
SA-RU - Rhodes - High-rate algael ponds.docx
SA-SC - South Cape - ERDs for desalination plants.docx
SA-SUN - Sun City - Energy load shifting and shedding.doc
SA-UW1 - Baseline Energy Audit Approach.docx
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