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每年50万吨餐厨垃圾将成“宝贝”

(2009-06-27 13:11:49)
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purac普拉克

杂谈

分类: 环境新闻

              每年50万吨餐厨垃圾将成“宝贝”

              

重庆餐厨垃圾签约现场:瑞典驻华大使林川 ( 左二 ) 为成功签约开怀大笑 Mr. Lin Chuan--Swedish ambassador (second from left) smile for the contract signing

潲水油、瓜果皮、烂菜叶,这些厨房常见的垃圾将变身生物柴油、有机肥料或进行发电。昨日,重庆瑞典餐厨垃圾处理技术合作签约仪式在市外侨办举行,市环卫集团将投资 2.7 亿元建成餐厨垃圾处理项目。

据介绍,该项目位于黑石子垃圾处理场东侧,将收集到的餐厨垃圾通过 “ 接受斗 ” 进行湿式破碎,所有物质进入 “ 沉淀分离 ” 。这道工序中,垃圾里包含的碗、筷子等固体物质会被分离出去,剩下的液体直接传到 “ 油脂分离系统 ” ,由该系统最后炼成生物制柴油。这种生物制柴油的成分、燃烧值与现在在加油站购买的柴油并无差别,能达到直接送加油站的柴油标准。除了制成生物柴油,经过厌氧发酵后还会产生甲烷,进行发电。最后剩下的垃圾可生产有机化肥,用于主城区市政绿化。

变废为宝的餐厨垃圾也会带来经济效益,市环卫集团人士算了笔账,目前我市主城每年产生餐厨垃圾就有近 50 万吨。项目建成后,预计年处理餐厨垃圾 18 万吨,年发电 3300 万度,提炼生物柴油 1 万余吨。按照市场价格每吨柴油 5000 元计算,每年将节约成本 5000 万元。

Waste oil, fruit peel and rotten vegetable leaves, which is familiar in the kitchen, will become the bio-diesel, organic fertilizer or biogas to generate electricity. The technical cooperation ceremony of restaurant waste treatment between Chongqing and Sweden is held in the municipal foreign affaires and overseas Chinese affairs office yesterday, the municipal sanitation group will invest 270million yuan into the restaurant waste treatment project.

This project is located at the east side of Heishizi landfill, the collected restaurant waste will be transferred into the reception bin for the wet decomposing and then further transferred to the sedimentation separator. The solids, such as bowls and chopsticks will be separated in this process, and the remained liquid will be directly transferred to the “grease separation system” where the bio-diesel is refined. The composition and combustion value of this bio-diesel has no difference with the diesel bought at the gas station and it can meet the diesel standards to send to the gas station directly. Besides producing bio-diesel, the restaurant waste can also produce methane for generating after the anaerobic fermentation. The final remained waste will produce organic fertilizer for the municipal green area.

The restaurant waste can bring economic benefits. At present Chongqing urban area produce 500,000T restaurant waste each year, after the completion of the project, 180,000T restaurant will be treated per year and 33million degree electricity will be generated, 10,000T bio-diesel will be refined. According to the diesel’s market price 5,000yuan/T, 50 million yuan will be saved each year.

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