雨水活用施設における流入水の水質と運用上の評価

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書誌事項

タイトル別名
  • INFLOW WATER QUALITY AND OPERATIONAL EVALUATION AT FACILITIES UTILIZING RAINWATER
  • 雨水活用施設における流入水の水質と運用上の評価 : 流入水の水質と上水補給水の二酸化炭素排出量への影響
  • ウスイ カツヨウ シセツ ニ オケル リュウニュウスイ ノ スイシツ ト ウンヨウ ジョウ ノ ヒョウカ : リュウニュウスイ ノ スイシツ ト ジョウスイ ホキュウスイ ノ ニサンカ タンソ ハイシュツリョウ エ ノ エイキョウ
  • Investigation of inflow water quality and the effect of make-up water supply on carbon dioxide emission
  • 流入水の水質と上水補給水の二酸化炭素排出量への影響

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<p> Around 1965, droughts began to occur frequently, and rainwater was needed to toilet flushing water. In recent years, the use of rain water has been regarded as important for securing water during disasters, and has become popular.</p><p> The purpose and effect o f the introduction of rainwater use facilities to buildings include effective use of water resources, suppression of outflow to rivers and sewers, reduction of environmental burden, emergency response, water saving, etc.</p><p> The paper listed the quality of the initial rain water and the effect of make -up supply water on the carbon dioxide emission.</p><p> (1)Initial rainwater removal is important to maintain the water quality of rainwater utilization facilities. It is recommended to remove the initial precipitation up to 1 mm from the viewpoint of turbidity and electrical conductivity, and up to 2 mm for higher quality precipitation. It was clarified that the carbon dioxide emission per water volume accompanying the make -up water supplied from the water supply facility varies greatly depending on each prefecture.</p><p> (2)It was revealed that the carbon dioxide emission per water volume by water supply facility is 3.4 times larger than the carbon dioxide emission per water volume related to rainwater utilization facilities. Carbon dioxide emission per water volume affects buildings with relatively low water supply substitution rate and buildings with relatively high water supply substitution rate, but also water supply substitution rate . Therefore, it was pointed out that it is necessary to evaluate the water supply substitution rate as well. It is necessary for rainwater utilization facilities to evaluate not only the carbon dioxide emissions related to transfer and disinfection of rainwater collection but also the carbon dioxide emissions related to make-up water.</p><p> The paper was able to propose the amount of water to be removed from the initial rain water, and a way of thinking about the amount of make-up water supply that greatly affects carbon dioxide emissions . However, there are other methods for evaluating rain water utilization facilities, so a comprehensive evaluation is required.</p>

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