Background

The King Abdullah University of Science and Technology (KAUST) is located at Thuwal, north of Jeddah in Saudi Arabia. The university is an international, graduate level research institution, dedicated to inspiring a new age in scientific achievement in the
Kingdom and around the world.

It is one of the worlds major research centres that focuses on water desalination and sewage water treatment, both of which are of vital importance in a region where water scarcity is a perennial challenge.

To meet the demand for fresh water a new Sea Water Desalination Reverse Osmosis (SWRO) plant was designed to satisfy the requirements of the University and its surrounding area. Due to the sensitive nature and location of the seawater supply lagoon, the pretreatment practice required ZERO chemical usage.

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Background

Toonagh (WTW) is a small rural site in County Clare, Ireland. The original process treatment took raw water and added alum for coagulation, chlorine for disinfection and sulphuric acid/caustic for pH correction. The water was then passed through a lamella separator and a sand filter with the sludge being captured in a tank for removal from site. The sludge was being removed from site by tanker every 1 to 2 days.

The cost of emptying the sludge tank so frequently and transporting it offsite was proving to be prohibitively expensive. The client was looking for a simple and easy to install and maintain solution to cut these costs.

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Background

A pharmaceutical company, based in Ireland was producing a new drug and required an effluent plant to remove the highly toxic compound Efavirenz (EFV) from their waste stream. They required to process 100m3/day of water, with a solids loading of 34kg/day. A batch was created over 5 days.

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Background

Kilmelford, a small village near Oban, had recently installed a new WWTW with a double septic tank. After installation it was discovered that the suspended solids and BOD levels were breaching the consent of the shellfish directive.

The solutions put forward to bring the site into consent were:

• Long sea out fall
• Membrane Bioreactor
• Spruce Filter™

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Background

Brookside Metals is a Wolverhampton based manufacturer of bronze castings and has had Environmental issues with Copper and Zinc discharge consents from their surface water collection lagoon. The lagoon is designed to overflow and discharge into a storm water sewer and then into a local river.

Samples of the discharge water were taken from site and tested in the Filter Clear laboratory. The processed water was then sent away for independent testing and analysis.

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Background

Barclye was a decommissioned water plant that was required on a temporary basis to be used during dry weather periods. The only treatment onsite was a drum filter and chlorination before the water went into supply. The main issues onsite were turbidity, colour and cryptosporidium.

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Background

Oaklands farm is based in Shropshire in the west of England. Oaklands is Europe’s largest egg production and packing facility, with 1.6 million chicken’s onsite. To reduce site running costs, rain and surface water is collected in a large lagoon and then treated for use as drinking water for the chickens.

The water was put through a membrane system and UV system and then chlorinated, however the ceramic membrane became quickly blocked when put into service.

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Background

Luss is a small village in Argyll & Bute, Scotland, on the west bank of Loch Lomond. The village has its own waste water treatment works which treats approximately 780,000l/day.

Being on the banks of Loch Lomond the site is subject to strict Bathing Water Directive consent limits. In addition, the works see large fluctuations in loading during the peak holiday periods which results in the final effluent quality being inconsistent, particularly with respect to suspended solids, BOD and coliforms.

The suspended solids carry over from the clarifier and then onto the UV disinfection system, which affects it by lowering transmission rates.

The works were failing to consistently meet the requirements for the bathing water directive for suspended solids and BOD.

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Background

Glenlossie Distillery is situated in the north of Scotland, not far from Elgin, nestling under the cover of a fir clad hill. Its location enables the waters running from the Mannoch Hills to collect in a reservoir just south of the distillery.

To save expensive mains water charges for 30,000 litres per hour, the reservoir was identified as a source for cooling water. A cooling tower was installed but became heavily fouled. This led to increased costs of biocides along with a drop in the cooling tower performance that potentially threatened the site with a return to mains water.

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Background

Loch Ascog WTW is on the Isle of Bute in Western Scotland and has been plagued with algal problems. The algae caused blankets to form across the slow sand filters causing major throughput problems and continuous filter blockages. Filter Clear were brought into to solve the algae problem and maintain the plant throughput.

Loch Ascog WTW consisted of 2 raw water intake wells and 5 slow sand filters. The project was concerned with the upgrading of the works to satisfy the following drinking water (DW) directives:

• DW 3.2 Manganese
• DW 3.7 Pesticides/Taste and Odour
• DW 3.9 Turbidity
• DW13.1 Aesthetic Quality (Disinfection Control)

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