Llanishen Reservoir

Client:Lewis Civil Engineering
Discharge Point:Surface Watercourse
Flow Rate:40m3/hr

Background

Lewis Civil Engineering was chosen by Welsh Water to drain down Llanishen Reservoir, Cardiff to test the existing scour valves. The reservoir is being drained down at a flow rate of circa 40m3/hr and Siltbuster were called in to keep the discharge into a nearby brook within consent.

 

The Overall Objective

To provide a temporary water treatment solution to treat the solids present in the reservoir water prior to discharge to the surface watercourse. This had to be operational 24 hours a day and be of consistent quality.

 

Solution

Siltbuster installed a multistage system, consisting of an HB50 settlement tank, an MT8 mix tank and two-stage chemical dosing system. Sensors were used on the system inlet to ensure pre-treatment chemicals (coagulant and flocculant) were only introduced when the Total Suspended Solids (TSS) content of the feed water exceeded the 60mg/l discharge target. Outlet sensors measuring water quality at all times. A GSM module sends a text message to alert users of an auto-shutdown.

This solution ensured a TSS of less than 30mg/l and pH of between 6 and 9.

Back to top
Gritbuster on the box! Filming for CBeebies "Do You Know?" took place yesterday at a large road sweeper depot in Te… https://t.co/c3ARSny7tE
8:28 AM 9 Apr 2019 Join the conversation
Whoever you are, wherever you are, water is your human right. 2.1 billion people live without safe water at home. T… https://t.co/ZdtHVcK9JK
9:53 AM 22 Mar 2019 Join the conversation
Siltbuster are in Stockholm to exhibit at 'Renare Mark' (Cleaner Ground) with our long time partner Clean Water Eng… https://t.co/lqtNKKu2Lu
2:28 PM 20 Mar 2019 Join the conversation
Equipment is only part of the Solution when it comes to complying with Environmental Legislation. Discover what els… https://t.co/Z628ffEeiO
8:58 AM 19 Mar 2019 Join the conversation
Siltbuster are supporting #RedNoseDay with a cake sale and competition at our Monmouth HQ to raise money to support… https://t.co/Nih1hUbsSR
10:01 AM 15 Mar 2019 Join the conversation