Effects of Water-saving Devices on Greenhouse gases emission from Johkasou.

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  • 節水機器の導入が浄化槽からの温室効果ガス排出量に及ぼす影響
  • セッスイ キキ ノ ドウニュウ ガ ジョウカソウ カラ ノ オンシツ コウカ ガス ハイシュツリョウ ニ オヨボス エイキョウ

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 Effects of water-saving devices on greenhouse gases emission from an on-site domestic wastewater treatment facility, Johkasou, were investigated. After installing water-saving devices, high CH4 peak was observed under the normal operation condition, however, introduction of anaerobic-aerobic circulation reduced CH4 emission. Considering greenhouse gases emission from water use, highest emission of 671.6 kg-CO2 eq house-1 year-1 was estimated in the case of no water-saving devices and normal operation condition. Lowest emission of 418.2 kg-CO2 eq house-1 year-1 was achieved with water-saving devices and anaerobic-aerobic circulation. It is clarified that introduction of water-saving devices and anaerobic-aerobic circulation reduce greenhouse gases emission by approximately 38%.

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