Remote Noise Logger Trial Pinpoints 115 Leaks
Aug 07, 2019
A technology trial involving installation of 295 Enigma3m remote correlating noise loggers in a water distribution network in the State of Johor, Malaysia, has successfully cut net night flow by a third. Yoo Sun Chan, general manager, Primayer Sdn Bhd, and Roger Ironmonger, managing director, Primayer explain how the work was carried out.
In December 2018 NRW – loss through leaks, bursts and unauthorised connections - was 24% and a number of actions was set in motion. Firstly, smart district metered areas (DMAs) of the water distribution network were implemented, with five DMAs involved in the first phase.
UK leakage technology specialist Primayer was approached by Ranhill through Mimtech, the company’s authorised distributor for the southern region of Malaysia, and the Enigma3m advanced remote correlating noise loggers were deployed in a three-month trial throughout August, September and October 2018.
The aim of the first month of the project was to locate leaks from the correlations obtained from the Enigma3m loggers; during the second month leaks were repaired and further monitoring was carried out in the third month. The trial was carried on Bandar Putra B DMA in the state capital Johor Bahru, with a total pipeline length of 38.51km and some 5,052 connections under investigation.
The leakage rate was determined by measuring the net night flow (NNF) and subtracting legitimate night flow from the minimum night flow. Prior to installation of Enigma3m NNF was 30.99l/s and total daily flow rate was 6,200m3/day.
During the implementation of the smart DMA programme, a total of 295 Enigma3m units were installed by the team from Ranhill Water Services. The Enigma3m loggers were installed at hydrant valves, air release valves and on exposed fittings along the pipeline. The distance between sites for Enigma3m units varied depending on whether the pipes were metal or polyethylene.
The Enigma3m loggers installed in Johor use GPRS communications to transmit daily noise data from leaks to remotely locate leaks in water distribution networks, a major step-up from traditional techniques which include the use of metal rods to listen for leaks from above ground. They are deployed in underground chambers and require no outlay on surface level equipment.
Deployment of multiple loggers means correlation can be performed, locating leak positions more accurately. Leak location results can be viewed on PrimeWeb, Primayer’s cloud-based data collection platform for water network pressure, flow and leak location monitoring.
PrimeWeb makes collection of real-time data possible, along with visual display of water network hydraulic data, leak alarms and correlated leak positions. Ranhill SAJ’s on-the-ground leakage crews were able to locate incidents using Google Maps and, together with street-view visualisation of leak positions, manage incidents efficiently and effectively.
A total of 115 leaks were found and repaired in Bandar Putra B DMA during the Enigma3m trial. Small leaks at hydrant valves and communication pipes were also located. After three months of Enigma3m installation, NNF was reduced by over a third to 20.08 l/s. This gives a saving of 705m3/day water, with a total cost saving of approximately £3,050 (US$4,000) per month.
Ranhill SAJ serves a 3.1 million population and manages 22,175km of pipes over an area of approximately 19,000km2.
The company intends to expand implementation of the Smart DMA concept across Johor state and some of the state’s most critical DMAs will be managed permanently with Enigma3m, depending on the age of infrastructure and site conditions. It is expected that more Enigma3m loggers will be required for the expanding programme.
More News and Articles
Mar 29, 2023
Water management: Spain invests nearly 23 billion euros
The Spanish government improves its water management and will invest nearly 23 billion euros to comply with European Water Directives.
Mar 27, 2023
UN World Water Day 2023: How municipalities can accelerate the water transformation
The United Nations is proclaiming the motto “Accelerating Change” for World Water Day on 22 March. The message: because the pressure on drinking water reserves is increasing worldwide, the change towards sustainable water use must be accelerated.
Mar 24, 2023
Innovative technologies remove pharmaceutical residues from wastewater
Every year on 22 March, World Water Day reminds us of the importance of one of the most important resources of life. Almost two-thirds of our planet is covered with water, but not even three percent is drinkable freshwater. Every …
Mar 22, 2023
Delivering sustainable solutions to solve water challenges
With British Water’s conference on creating a more sustainable water sector approaching, Stephen Kennedy, head of digital and innovation at MWH Treatment shares his views on celebrating recent successes in creating a more sustainable sector while also discussing the challenge …
Mar 20, 2023
Supporting the National Water Strategy through scientific research
This month, the federal government of Germany introduced the first National Water Strategy. “With this strategy, the federal government is shining a spotlight on the necessity of integrated water resource management, serving as a leading example of resource use in …
Mar 17, 2023
Trenchless manufacturer celebrates installation of 100,000th liner
SAERTEX multiCom®’s trenchless pipe relining product, SAERTEX-LINER, has been installed for the 100,000th time.
Mar 15, 2023
Versatile electric pipe-cutter makes UK debut
The first all-electric battery-operated lateral pipe-cutter to enter the UK market has secured sole distribution with pipeline equipment specialist Ant Hire Solutions.
Mar 13, 2023
Spring collaborates with Microsoft and Impact X on water innovation
The water sector’s innovation centre of excellence – Spring - is collaborating with Microsoft and Impact X on a new initiative to make tools and funding available for start-ups to accelerate their companies.
Mar 10, 2023
State of Global Water Resources report informs on rivers, land water storage and glaciers
WMO reports on freshwater availability in a changing climate
Mar 08, 2023
Australia: Centenarian sewer gets after-dark upgrade
Over 100 years since its inception, Brisbane’s S1 Main Sewer has undergone a seven-year upgrade.
Mar 06, 2023
UKWIR gives access to hundreds of water sector research reports
UK Water Industry Research (UKWIR) is providing free access to over 1,000 of its water sector research reports aimed at helping to improve water and wastewater services for customers, and protecting the environment.
Mar 03, 2023
Sector must challenge public misconceptions through engagement
The water sector must tackle “unfair criticisms” by sharing more about the great work it delivers, Yorkshire Water’s chief executive, Nicola Shaw, told attendees at British Water’s Better Together reception in Hull.
Digital Marketing Manager
Parklands Business Park, Denmead
PO7 6XP Hampshire
+44 23 9225 2228