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疫情影響啤酒滯銷 澳洲污水處理廠用過期啤酒發電
14 Aug 2020

 

澳洲受新冠肺炎疫情影響,當地啤酒出現滯銷,更有指數百萬升的過期啤酒被倒進下水道。南澳州一廢水處理廠近幾個月開始收集過期啤酒,將其化成可再生能源沼氣發電。

 

啤酒與污泥混合後並在無氧環境加熱後可分解出富含甲烷的沼氣。


澳洲由今年3月起開始封城,當地大量餐廳及酒吧被逼關閉,釀酒廠剩餘大量啤酒未能出售,並放置至過期。據《CNN》報道,位於南澳州首府阿得雷德西部Glenelg的一間污水處理廠南澳水務公司(SA Water)將有機工業廢料、污水污泥等混合,並用過程所產生的沼氣轉化為污水處理廠供應電力,以滿足處理廠8成能源需求,他們近期加入過期啤酒發酵後,發現可令發電量大增,單月可提供高達654兆瓦時的電力。

南澳水務公司生產和處理單位的高級經理漢南特(Lisa Hannant)解釋,啤酒的分解能力佳,將啤酒與污泥混合後並在無氧環境加熱後可分解出富含甲烷的沼氣,加上啤酒的高熱值(燃燒過程中釋放的熱量)使其在厭氧消化過程中非常「完美」。他指,自從每週加入15萬升過期啤酒後,5月和6月分別產生沼氣逾35萬立方米以及32萬立方米,足以為1,200戶房屋供電。

 

資料來源:星島日報

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