Trenchless Pilot Program

Trenchless Pilot Program

showcase1The ‘Trenchless Pilot Program’, funded by the Embassy of the Kingdom of the Netherlands, was successfully carried out within EWS under guidance of Your Man on Site (YMoS), over the last two years. With the assistance of program partners and BAM Nelis Infra, the program has tested different trenchless technologies under local circumstances, addressing cost effectiveness, knowledge transfer, capacity building and feasibility. The program was tailored to the needs of EWS within the asbestos cement (AC) water mains replacement program and focused on ‘Close Fit’ rehabilitation technologies as well as pipe cracking.3product specification


pdfCoE showcase 1 - Trenchless technology

Background

From 2010 to 2012 the ‘Trenchless Pilot Program’, funded by the Embassy of the Kingdom of the Netherlands, was successfully carried out within EWS under guidance of Your Man on Site (YMoS). With the assistance of program partners WAVIN (the leading supplier of plastic pipe systems and solutions in Europe) and BAM Nelis Infra (specialist in underground pipeline constructions for water & sanitation infrastructure), the program has tested different trenchless technologies under local circumstances, addressing cost effectiveness, knowledge transfer, capacity building and feasibility.

The program was tailored to the needs of EWS within the asbestos cement (AC) water mains replacement program. It focused on ‘Close Fit’ rehabilitation technologies (e.g. WAVIN’s Compact Pipe and Neo Fit for the rehabilitation of respectively mains and service connections).

Technology

image009.jpgVia the installations EWS gained insight into the high socio-economic inconvenience caused by conventional 'open trench' utility work as experienced by its customers.

‘Know how’ was developed to assist decision-making on installation techniques and material, related to local (urban) circumstances.

EWS gained access to new innovative ‘Close Fit’ lining rehabilitation technologies of Dutch origin and a pool of licensed and trained local contractors.

Status & Feedback

The showcase has been concluded in 2013.

Location

Contact

Jeroen Bosboom

Your Man on Site

Tel: +27 (0)82 7334550

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Results

image013The tested trenchless technologies provide a superior solution in terms of social and environmental costs. When replacing a pipeline under the correct conditions it also scores positive when comparing direct costs.

  • The ‘Trenchless Pilot Program’ proved to be an effective method to facilitate the launch of new trenchless technologies for the benefit of South Africa and EWS.
  • Several national contractors have invested in the necessary equipment and are licensed by WAVIN with the tested ‘Close Fit’ technologies.
  • Other South African municipalities have now awarded rehabilitation contracts with these Dutch trenchless technologies.
  • These trenchless technologies might well be a feasible way of cost effectively speeding up municipalities rehabilitation of water & sanitation infrastructure.

Generic specifications to guide non-biased tender processes were developed.

A supportive trenchless decision model is available.

Training

A training is available addressing the following points;

  • Rehabilitation: reasons & Approaches
  • Socio economics of Trenchless Technologies
  • Comprehensive overview on different Trenchless Technologies
  • Decision modelling, which technology to use where
  • Generic specifications

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Algae control

Algae control

Algae pontThe use of Ultrasonic equipment to control algae growth in various process steps of drinking water and waste water treatment works.

LG Sound produces innovative equipment to control algae blooms in lakes and reservoirs.

In this showcase, we aim to validate the LG Sonic equipment at 4 different locations in South Africa.

3product specification


Background

Various process components of drinking water and waste water treatment works in South Africa suffer from excessive algae growth. This has an influence on the treatment capacity and efficiency, resulting in a requirement to control algae growth.

Cato Ridge WWTW is a maturation ponds type waste water treatment works, consisting of 5 ponds. In this showcase, LG Sound algae control equipment will be installed first in pond no 1, the most upstream pond. At success, the equipment will be installed in the remaining ponds downstream.

Technology

The ultrasonic equipment produced by LG Sound are specifically designed to control algae blooms and biofilm in underwater systems.

The LG Sonic systems produce specific ultrasonic frequencies that affect the algal distribution within the water column. It is an environmental friendly technology which is harmless to fish and plants.

To use ultrasonic sound waves effectively for algae or biofilm control, it is important that very specific frequencies are used, issued under specific circumstances, therefore the LG Sonic products have different ultrasonic programs, that can be set to the specific algae that are present in the water. Optionally, the products can be combined with in-situ water quality monitoring, so the LG Sonic products can be set to the optimum frequency automatically.

Status & Feedback

The showcase is expected to start in the second half of 2014.

Location

The project locations are 4 different locations throughout South Africa: Cato Ridge WWTW: a maturation ponds type waste water treatment works in KZN. Details of the remaining project locations will follow.

Cato ridge, Durban

Contact

Dhevan Govender

Senior Manager: Commercial and Business

eThekwini Water and Sanitation

Tel: +27 (0) 31 311 8689

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Results

The aim of this showcase is to show the results of control of Algae in the various process components, to be verified both visually (photographs) and with Algae counts and determination in a laboratory.

Training

Training is anticipated to be available early 2015.

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Fast lab

Fast lab

EventLabThe use of innovative optical biosensor technology for both online and sample based water quality monitoring and real-time detection of contaminants in water.

In this showcase we aim to demonstrate and validate the Optiqua EventLab online water quality monitoring system for the specific requirements of the water distribution network of eThekwini Municipality.

3product specification



Background

Drinking water quality is strictly regulated by national standards during production. Water quality in the distribution network, however, is only measured by grab sampling every fortnight and at a limited number of locations. As a result the distribution network is a black box in terms of water quality.

Online water quality monitoring in the distribution network is important, as on average30-60% of water quality incidents occur there. The use of online quality monitoring allows rapid detection and localisation of quality events.

With the help of online sensors, corrective actions can be taken and it will be possible to improve inspection and maintenance planning.

Technology

Optiqua EventLab is a generic optical sensor concept that measures minute refractive index changes in water using an integrated optical chip. Refractive Index (RI) is a useful generic indicator of water quality as any substance, when dissolved in water, will change the refractive index of the water matrix.

In EventLab, the chip is packaged in a probe which is operated in a flow through cell, using a pressure regulator and flow meter to establish a constant pressure and flow rate over the sensor surface.

EventLab measures refractive index changes of the water matrix without the use of chemicals or other consumables. The sensors are supported by Optiqua’s proprietary web-based software, EventLab Online. EventLab Online provides real time alerting on water quality changes, an overview over the network of EventLab sensors and their status as well as detailed information per individual sensor unit.

All EventLab sensor units transmit their data via a GPRS modem (across commercial telephone networks) to the designated Optiqua databases and servers.

Status & Feedback

The showcase is expected to start in the second half of 2014.

Location

Contact

Dhevan Govender

Senior Manager: Commercial and Business

eThekwini Water and Sanitation

Tel: +27 (0) 31 311 8689

This email address is being protected from spambots. You need JavaScript enabled to view it.

Results

The aim of this showcase is to show the results of tests of the Optiqua EventLab online water quality monitoring system for the specific requirements of the water distribution network of eThekwini Municipality.

Training

Training is anticipated to be available early 2015.

Feedback

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