煤氣(00003.HK)收集沼氣轉化爲清潔能源 每年減少近20萬噸二氧化碳
中華煤氣(00003.HK)表示,公司自90年代開始,先後於船灣、打鼓嶺和將軍澳三個堆填區收集沼氣,作爲燃氣原料,轉廢爲能。煤氣公司燃氣生產總經理伍杏偉表示,去除沼氣的二氧化碳、硫化氫、非甲烷碳氫化物,經淨化後的沼氣可變爲清潔能源。三個堆填區沼氣應用項目每年減少接近20萬噸二氧化碳,相等於種植約610萬棵樹木。
他補充,煤氣公司生產的人工燃氣,當中一半的成份爲氫氣,透過變壓吸附技術,公司從燃氣管網提純出氫氣,氫氣純度達99.99%,可供氫燃料電池產電。
另外,煤氣公司內地子公司華衍環境於蘇州工業園區2019年建立廚餘處理項目,透過厭氧微生物在無氧狀態下將有機廢棄物分解消化,一方面把廚餘變作肥料,又產出沼氣作爲可再生能源。至今該項目已累計處理有機廢物逾33萬噸,生產逾1,300萬立方米天然氣。
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