O•PARK1, the first organic resources recovery center, locating at Siu Ho Wan of North Lantau adopts anaerobic digestion technology to convert food waste into biogas (a source of renewable energy similar to natural gas) for electricity generation whilst the residues from the process can be produced as compost for landscaping and agriculture use.
O•PARK1 is capable of handling a maximum of 200 tonnes per day of food waste from commercial and industrial sectors.
Food waste is any waste, whether raw, cooked, edible and associated with inedible parts generated during food production, distribution, storage, meal preparation or consumption of meals.
Hong Kong people throw away about
About one-third comes from food-related commercial and industrial (C&I) sources and two-thirds from households
Over the years, EPD has been promoting the food waste reduction and donation by implementing various initiatives and programmes, including the Food Wise Hong Kong Campaign and Food Wise Eateries. However, there is still a large portion of food waste ended up in the landfills. The current practice of disposing food waste in the landfills is not a sustainable solution as it leads to rapid depletion of the limited landfill space. It also generates greenhouse gases such as methane, and wastewater during degradation, imposing severe burden on our environment. Odor control is a major challenge in handling food waste because it decomposes quickly and creates odor. The most efficient and environmentally sound method to recycle food waste is to build a network of dedicated recycling plants.
‘The Government will soon commence the site search, feasibility studies and requirements needed for development of the remaining 2 to 3 regional O•PARKs. We maintain an open and proactive attitude in searching for further O•PARKs’ sites. The number and scale of further O•PARKs would depend on the progress of waste reduction in Hong Kong.’
Food Wise Hong Kong Campaign
‘A Food Waste & Yard Waste Plan For Hong Kong 2014-2022’
Food Donation Project under Environment and Conservation Fund
Food Wise Eateries Scheme
|Siu Ho Wan of North Lantau|
|Design Capacity: 200 tonnes/day’|
|Sha Ling of North District|
|Design Capacity: 300 tonnes/day’|
Other Food Waste Treatment Facilities in the future
The biogas generated from the anaerobic digestion process is turned into heat and electricity that can support the needs of the facility. When running in full capacity, about 14 million kWh of electricity can be exported to the grid per year, which is equivalent to the power consumption by some 3,000 households.
The decrease in use of fossil fuel for electricity generation together with the reduced amount of organic waste of in landfills would prevent the emission of some 25,000 tonnes of greenhouse gas each year.
After the anaerobic digestion process, digestate will be converted into compost for landscaping and agriculture applications – a total reduction of almost 100% of the original food waste volume. This dramatically cuts down the quantity of food waste to be disposed of in the landfills.