Waste Treatment. Waste treatment techniques are used to change the physical, chemical or biological character of the waste, to reduce its volume and/or toxicity and to make the waste safer for disposal. How is waste being generated?. Raw Material Acquisition. Material Processing.
Waste treatment techniques are used to change the physical, chemical or biological character of the waste, to reduce its volume and/or toxicity and to make the waste safer for disposal.
Raw Material Acquisition
Product Use or Consumption
Waste generated in the life cycle of a product
The quantities of major types of solid waste disposed of in Hong Kong (1986-1999)
Major components of domestic waste disposed of in Hong Kong
In Incineratorsof conventional design, refuse is burned on moving grates in refractory-lined chambers;
In a Modern Landfill, refuse is spread in thin layers, each of which is compacted by a bulldozer before the next is spread.
Composting Operationsof solid wastes include preparing refuse and degrading organic matter by aerobic microorganisms.
kitchen wastes leaves grass clippings
Composting In Garden
Recycling is the act of recovering a waste material for
reuse and processing into another useful product.
in homes and offices for recycling.
- Re-usable items get thrown away, such as this
wood used to decorate an office or flat.
- Refrigerators and other appliances contain metals
that could be recycled.
From 99 Policy Address
(source: EPD website, 2001 http://info.gov.hk/wfbu/whatwewilldo/www02.htm)
(Source: EPD website, 2001 http://info.gov.hk/wfbu/whatwehavedone/wms/sland/l_f_sect.htm)
Refuse Truck Unloading at Tipping Face in Landfill
(Source: EPD website, 2001 http://info.gov.hk/wfbu/whatwehavedone/wms/sland/l_fillop.htm)
Locations of Operating RTSs
(source: EPD website, 2001 http://info.gov.hk/wfbu/whatwehavedone/wms/rts.htm)
Operation of Refuse Transfer Station
(Source: : EPD website,2001 http://info.gov.hk/wfbu/whatwehavedone/wms/rts.htm)
CWTC in Tsing Yi
(Source: EPD website, 20001 http://info.gov.hk/wfbu/whatwehavedone/wms/cwtc.htm)
Solid Waste Reduction
By a calcining process, liquid waste can be solidified
The New Waste Calcining Facility converts high-level liquid waste into calcine.
The granular end product is transported through pipes to stainless steel bins.
The bins are encased in underground vaults.
Waste Incinerator and Heat Collection System
Waste treatment in Japan
Waste reduction campaign
The underlying attitudes that lead to antisocial behaviour.
Education, and acceptable methods of modifying antisocial behaviour.
The impact of law enforcement via litter warder and litter courts.
The school environment as a starting point.