Sophisticated RVT Water Management System installed during an upgrade project at a Water Treatment Works

Case Study Overview

The Water Treatment Works was undergoing an extensive project to upgrade the plant to a 21st century standard. Once the upgrade project is complete, the works will be able to provide up to 210 megaliters per day of wholesome drinking quality water to the latest standards well into the future.

Challenge

The contractor was tasked with carrying out the modification and upgrade to the existing rapid gravity filters (RGFs) from direct filtration to conventional post-clarification filtration. The materials from the redundant sand filters would then be recycled and reused where appropriate with the aim of having no waste going to landfill.

A river flows near the site and there was a risk that any uncontrolled drainage from the site may end up there. The river is environmentally sensitive to any pollutant as well as being a major tributary joining the River Severn as it winds its way from mid-Wales, to the Bristol Channel. With this in mind, it was essential that dealing with surface water run-off and groundwater during excavations was carefully controlled. Excavations, especially where there is a risk to existing plant and water supply, have to be very carefully controlled. This presented a major challenge for the contractor because works were taking place during a period of record high rainfall.

Solution

Due to the sensitive nature of the site, RVT worked closely with the contractor to better understand the expected contaminants and the water flow volumes to be treated. RVT performed a free site survey, took water samples from site and carried out jar tests, before installing a bespoke water treatment solution.

Download the full case study to find out more.