The bio-film technology for river purification in Japan and South Korea and other countries were
gravel contact oxidation method, artificial packing contact oxidation method, thin layer flow method,
underground stream purification method, etc. The strengthening purification technology of river
researched by Japanese were mainly indirect purification, which was to build the purification facilities on
the side of the river, using the drop of the river to lead the water into the purification facilities and purify
before discharging. By the way the purification facilities mostly use the underground model in order to save space. Japan Nogawa utilized the gravel contact oxidation, the packing was gravel, and the removal
rates of BOD and SS were 72.3% and 84.9% respectively. With new non-woven fabric as packing, the
drainage ditch facilities in Chiba County was set on the side of the ditch, and the removal efficiency of SS
reached 97%, the removal rates of BOD and COD were 88% and 70% respectively [15]. Park, Y. K.
utilized UF-ozone-biological activated carbon to filter and purify the polluted Kumbo River, and the
removal rate of ammonia reached 90%, the removal rate of TOC was significant [16].
The bio-film technology for river purification in Japan and South Korea and other countries weregravel contact oxidation method, artificial packing contact oxidation method, thin layer flow method,underground stream purification method, etc. The strengthening purification technology of riverresearched by Japanese were mainly indirect purification, which was to build the purification facilities onthe side of the river, using the drop of the river to lead the water into the purification facilities and purifybefore discharging. By the way the purification facilities mostly use the underground model in order to save space. Japan Nogawa utilized the gravel contact oxidation, the packing was gravel, and the removalrates of BOD and SS were 72.3% and 84.9% respectively. With new non-woven fabric as packing, thedrainage ditch facilities in Chiba County was set on the side of the ditch, and the removal efficiency of SSreached 97%, the removal rates of BOD and COD were 88% and 70% respectively [15]. Park, Y. K.utilized UF-ozone-biological activated carbon to filter and purify the polluted Kumbo River, and theremoval rate of ammonia reached 90%, the removal rate of TOC was significant [16].
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The bio-film technology for river purification in Japan and South Korea and other countries were
gravel contact oxidation method, artificial packing contact oxidation method, thin layer flow method,
underground stream purification method, etc. The strengthening purification technology of river
researched by Japanese were mainly indirect purification, which was to build the purification facilities on
the side of the river, using the drop of the river to lead the water into the purification facilities and purify
before discharging. By the way the purification facilities mostly use the underground model in order to save space. Japan Nogawa utilized the gravel contact oxidation, the packing was gravel, and the removal
rates of BOD and SS were 72.3% and 84.9% respectively. With new non-woven fabric as packing, the
drainage ditch facilities in Chiba County was set on the side of the ditch, and the removal efficiency of SS
reached 97%, the removal rates of BOD and COD were 88% and 70% respectively [15]. Park, Y. K.
utilized UF-ozone-biological activated carbon to filter and purify the polluted Kumbo River, and the
removal rate of ammonia reached 90%, the removal rate of TOC was significant [16].
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