Our Technology

For food/bio waste, decentralised anaerobic digestion has been shown to be the most efficient and suitable recycling method.  

Conventional anaerobic digesters tend to be bulky and therefore less suitable for cities where space is scarce.  Based on more than 5 years of ongoing research work, a highly efficient and compact anaerobic digestion system has been developed by E2S2.  Our patent-pending AD system is between 2-5 times more efficient than conventional anaerobic digesters.  In addition, our anaerobic digestion process and product are odourless.

E2S2 system users can expect to significantly reduce their waste disposal cost, achieve an environmentally sustainable waste processing method and at the same time  generate additional revenue through fertiliser by-products.




How It Works

Anaerobic digestion is a collection of processes by which micro-organisms breakdown biodegradable materials such as food waste in the absence of oxygen. 

Biodegradable matter is decomposed by anaerobic bacteria and produces a gaseous by-product, i.e. biogas.

Biogas is then converted to electricity which can be supplied to the other electrical appliances.  E2S2 anaerobic digestion system is net energy positive – it produces more energy than what it consumes.  It therefore has a low running cost.

E2S2 anaerobic digestion system also produces heat for hot water purpose.

In addition, the digestate from the system can be used/sold as fertiliser.  The fertiliser consists of mainly liquid with a small amount of solid  (around 2%)

E2S2 anaerobic digester is up to 500% more efficient than traditional anaerobic digesters, which means it can be as small as 20% of traditional anaerobic digesters.

Unlike other food waste treatment method, E2S2 anaerobic digestion system is designed to have good odour control, making it suitable for places with dense human traffic and/or food processing areas.

E2S2 anaerobic digestion system has minimal maintenance requirement and therefore low running cost.





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– Horticultural waste

– Food waste from central kitchens, hotels, malls, food manufacturers

– Manure