20 Fenchurch Street – Walkie Talkie Building

Walkie Talkie Building Water Recycling – 20 Fenchurch Street, London

Aquaco supplied, installed, and commissioned a multi-media grey water system, capable of processing 20,000 litres per day in 2013. The grey water is used for WC flushing demands for office workers within the building.

20 Fenchurch Street is one of the most distinctive buildings in London, and its height of 160m ensures that it is also one of the tallest in the city.

20 Fenchurch Street – Walkie Talkie Building Water Recycling

Walkie Talkie Building Water Recycling from Aquaco offers a uniquely cost-effective solution for the collection waste water and grey water from baths, showers and hand basins to re-use for toilet flushing, irrigation and washing machine supply. Aquaco grey water recycling and harvesting systems reduce waste water usage by typically 50%, provide a payback of 3-5 years and are the most cost effective way to gain Breeam or Code for Sustainable Homes points.

Aquaco designs and supplies grey water recycling and rainwater harvesting systems for residential homes, multi-residential, commercial and institutional applications. Kuwait NBK Grey Water Recycling system is the worlds most advanced solution

Aquaco’s team of qualified engineers has considerable technical and commercial experience in the United Kingdom and abroad. Systems have been installed in prestigious buildings throughout the U.K and overseas.

Multi-Media Grey Water Systems – Kuwait NBK Grey Water Recycling

The Aquaco Multi-Media Grey Water System is an incredibly high flow, fully packaged, and small footprint, grey water recycling solution. It is an incredibly energy efficient filtration system for larger projects.

How does it work?

The high-level philosophy of the system works in a similar way to a traditional sand filter. However, Aquaco uses a 4 layer multi-media instead of sand in order to increase filter efficiency, prolong the time between backwash cycles, and reduce the cost of filtration in kW/1,000 litres of treated water. Details of our process are below, specific process item details can be found in the downloads section:

  • Incoming greywater from showers, wash hand basins and baths passes through the Aquaco pre-filter, which removes any excess hair and large particulates from the grey water stack. The filter comes with built-in spray bars and is supplied with a timed backwash system to be attached to the boosted treated water. The filtered outlet of the pre-filter connects to the pre-treatment tank.
  • The pre-treatment tank is used as a buffer to store the incoming grey water before it is filtered. The tank is aerated and equipped with perforated EDPM aeration tubes and provide a highly oxygenated environment to promote the aerobic biological growth of bacteria. The bacteria digests suspended solids, and helps to reduce the loading on the filters. The process of aeration prevents the bacteria from respiring anaerobically, stopping any risk of fouls smells and stagnation.
  • The water leaves the pre-treatment tank and enters into multi-media filtration skid. It is drawn off using the filter feed pump, which is part of the packaged unit. The water is dosed with Sodium Hypochlorite to disinfect the water and prevent a bacterial film from building up in the filter vessel. The water then passes through the filter bed and is pumped to the post-treatment tank.
  • Prior to entering the post-treatment tank, Aquaco offer an optional activated carbon filter which removes any latent turbidity cause by dyes etc. the activated carbon is also very good at removing any excess chemicals should the water be used for any sensitive purposes i.e. irrigation.
  • The post-treatment tank is where the water is stored prior to being utilized at the point-of-use by either an Aquaco Master Control Unit packaged booster pump set, or a traditional booster set. Aquaco use All the major booster set suppliers for traditional booster use and can provide a set to suit the clients preferred supplier; Grundfos, Armstrong, KSB, Lowara etc.
  • The filtration is controlled by the Aquaco multi-media control panel. The panel is a full PLC panel, and supports MODBUS. All set points, controls, filtration rates, and volt free contacts are manageable and editable from this single point of control. The panel is also responsible for the  backwash cycle and the control of any high-level diversion valves.
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