2025年一千萬倫敦人喝處理後的生活污水(灰水黑水)

London 'could drink treated sewage' - Thames Water

• 10 May 2013
• 轉載自: http://www.bbc.com/news/uk-england-london-22479216

  Some Londoners were less than enthusiastic about the idea Recycled toilet waste could be introduced to London's tap water, under plans being considered by Thames Water.
The company has launched a consultation on the idea of drinking sewage water which has been treated, put back in the Thames and retreated.
A strategy document said the technique was "common practice" across the world.
But many Londoners told the BBC they were unhappy at the idea of drinking waste water including from dishwashers, washing machines, baths and toilets.
One said: "I think chemically treated sewage is a step too far.
"It's definitely not something I would drink."

We are putting this on the table now and saying, 'what do you think folks'?Thames Water

Another added: "I don't think it sounds like a viable option. It wouldn't be my first choice."
London is facing a growing water shortage as the population moves towards ten million.
Thames Water says unless action is taken, the deficit will be about 125 million litres per day by 2015  現時每天缺12.5萬公噸.
The company has already set up a test plant in Enfield, north London, which is experimenting with the recycling method.
A Thames Water spokesman said: "This waste water re-use we are asking for our customers views on is not something we are planning to implement any time soon.
"This is something we see as a longer-term measure and if implemented at all it would be in 2025  九年後投入使用.
"We are putting this on the table now and saying, 'what do you think folks'?"
He added that with towns such as Oxford upstream from London there was "a degree of waste water recycling going on now".

歐洲大部份地區降雨頻繁並不需要複雜的水資源管理技術. 中世紀阿尔卑斯山脉以北最大的城市倫敦只有 3.5萬人，而西班牙的摩尓人在科尔多瓦通过灌溉农业养育了上百萬人口 155頁, 全球水危機 : 節約用水從我做起 = When the rivers run dry / [英]弗雷德.皮爾斯著 ; 張新明譯.北京智識產權出版社 2010 今日倫敦市民喝的泰晤士河水其實已完成多次(傳說是7至10次, 註一)飲用和排放的循環了195頁. 總结經過大殖民時代的經驗,發展中國家(印度,非洲)傳統集雨智慧和技術比歐洲水利文明修建的大型調水工程更有效,中東地區人仕更無視西方工程規範,沿用着自己過去收集雨水的方法 223頁  現今世界上數百萬英畝的乾旱地區,過去曾經沿用傳統智慧集雨, 但其比例在二十世紀逐漸下降,預計二十一世纪會有一較大比例復蘇.現時亞洲有20億人依照傳統智慧集雨. 淡化海水無法滿足灌溉需求,糧食生產仍需依靠傳統智慧集雨技術227頁
現時倫敦每天缺水12.5萬公噸.  2025年一千萬倫敦人喝處理後的生活污水(灰水黑水). 其他選擇包括建大水庫或引塞文Severn 河的水.

註一 : http://www.standard.co.uk/news/london/drinking-treated-sewage-could-be-the-answer-to-the-capitals-water-shortage-says-thames-water-8608672.html