London first to order new bio-thermic digester plant 11 August 2014

London's Regional Waste Recycling (RWR) has chosen Advetec Technologies to install a new water treatment system using the firm's first industrial scale, bio-thermic digester.

The new plant is expected to reduce organic waste from fat traps, septic tanks, filter cakes and municipal collections by 96%.

John Edwards, director of RWR, says the decision follows trials using a smaller bio-thermic digester.

"The smaller machine was regularly turning over 90% of organic waste into clean water and dry powder," states Edwards.

"So we're confident that the new, larger machine will cope with the huge volumes of solid sludge and organic waste we receive every day."

Advetec managing director Craig Shaw confirms that the new industrial-scale machine will process up to 33 tonnes of organic waste within 72 hours.

"This first UK site will prove that our technology can reduce industrial quantities of contaminated water, fatty deposits and comingled waste by 96% to water and powder," states Shaw.

"Our technology will meet London's strict regulatory standards and deal with huge volumes of waste to make the goal of zero waste to landfill achievable."

The result of eight years' development, Advetec's bio-thermic digester is manufactured in the UK.

Shaw says it is unique, combining a new understanding of aerobic bacteria, new bio-stimulant technology that speeds up the digestion process, and new engineering and continuous remote monitoring.

Edwards explains that the new process will kick in after RWR's materials recycling facility shreds, crushes and segregates black-bag waste removing glass, sand, metal and plastics.

The organic waste then will go via hoppers and augers into the new bio-thermic digester, he says.

Heat from beneath the new container-sized unit will maintain a controlled temperature and this, together with a regulated air supply and doses of bio nutriments, will remove moisture and promote oxygenation to quickly reduce hard carbon particulates.

Instead of typical landfill costs of £80/90 per tonne, RWR's costs will be around £1.99 per tonne to process on site, offering a typical return on investment within 18 months.

Regional Waste Recycling, which collects the majority of the liquid waste within the M25 area, treats more than 300,000 litres of gully, septic tank, flood and industrially contaminated water and 150 tonnes of municipal waste daily.

Brian Tinham

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