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Rotowaro Carbonisation Plant
The Rotowaro Carbonisation Plant, also known as the Waikato Carbonisation Plant, was a coal processing plant in the Rotowaro/Huntly area, New Zealand. It was also the first plant to use the Lurgi process in the Southern Hemisphere.
== History ==
The first of its kind in the Southern Hemisphere,〔(Tonkin & Taylor Ltd Investigation )〕 the plant was constructed in the late 1930s to convert otherwise unusable low-quality coal from the nearby Rotowaro Coal Mines into carbon briquettes, which were then used for domestic heating. The coal was carbonised using the Lurgi process, the result being coke and charcoal, with tar and creosote as by-products. The tar was used with the char to create the briquettes. Waste from the plant was discharged directly into the nearby Awaroa stream, which caused heavy pollution of the waterway. Following complaints about the pollution, Waikato Carbonisation Limited trialed a waste incineration programme, but the output of the plant exceeded the capacity of the burners. The excess was pumped into waste pools up until the plant's closure in 1985, when major fire caused a retort to explode.
Various ownership changes lead to the complete abandonment of the plant. The plant currently sits on land administered by the Public Trust.
Due to the historic nature of the site, the plant is classed as a Category I Historic Place by the Historic Places Trust.〔(Historic Places Trust - Site No 4171 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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