Programme
Highlight [CHAMPION of 2017 Environmental Paper Award]
Hong Kong Productivity Council (HKPC) has
developed a novel 3-step zero discharge process through a 2-year research
study. A pilot system capable of processing 50kg/day food waste was built to
prove the design concept. It comprised three main steps: pretreatment, food
waste decomposition and biogas production. A patented pretreatment machine was
developed to treat wet and sticky Asian food waste. Through this machine,
organic portion of food waste could be automatically separated from
non-biodegradable matters and become homogeneous fine particle slurry. Two
separated bioreactors were used to cultivate two distinct types of microbial
population. In the decomposition bioreactor, complex organic substances were
broken down into three types of reusable products: floatable oil, nutrient
solution of simple organic acids and protein-rich solid residue. The floatable
oil was quality waste oil that could be sold as raw material for biodiesel
while the protein-rich solid residue was dried to produce eco fish feed. The
nutrient solution was fed to the methanogenesis bioreactor in which the organic
acids were converted into biogas by methanogenic bacteria. The HRT of the
decomposition substances was as short as 2-3 days while that of the
methanogenesis bioreactor was only 7-8 days. The wastewater coming out of the
methanogenesis bioreactor was recycled back to the pretreatment system so that
there was no wastewater discharge. The developed process can be employed in
decentralized systems to convert food waste into high market value products.
Language
The presentation and powerpoint in English
Speaker
Ir Dr Anthony MA – Principal Consultant, Hong Kong Productivity Council
Registration
& Enquiries
The seminar is free of charge with maximum
participants of 80. For registration,
please enroll online in EV Division website (http://ev.hkie.org.hk/ ). Successful applicants will be notified before
the event. For enquiries, please contact
Mr. Benjamin Lam 91522316. Attendance
certificate will be awarded after seminar.