| 果蔬垃圾乳酸发酵液对焚烧飞灰中氯和重金属脱除的影响 |
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| 引用本文： | 王晓娜,高明,饶怡,王莹,吴川福,汪群慧.果蔬垃圾乳酸发酵液对焚烧飞灰中氯和重金属脱除的影响[J].环境工程,2021,39(12):188-192. |
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| 作者姓名： | 王晓娜 高明 饶怡 王莹 吴川福 汪群慧 |
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| 作者单位： | 北京科技大学能源与环境工程学院,北京100083;成都市兴蓉再生能源有限公司,成都610000 |
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| 基金项目： | 国家重点研发计划(2018YFC1900103)国家自然科学基金(51778052)。 |
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| 摘 要： | 以果蔬垃圾的乳酸发酵液为浸出液,以纯水为对照,考察了乳酸发酵液对飞灰中氯的脱除效果。结果表明:与水洗相比,乳酸发酵液可脱除飞灰中59.3%的水不可溶性氯,使处理后的飞灰入窑比从0.57%增加至1.74%。此外,虽经乳酸发酵液浸出后的飞灰中出现重金属的富集现象,但按照以氯为限值计算的入窑比(1.74%)反推入窑飞灰中重金属的含量可知:入窑飞灰中重金属含量远低于HJ 662—2013《水泥窑协同处置固体废物环境保护技术规范》标准中规定的限值。因此,以乳酸发酵液进行酸洗替代水洗有利于飞灰通过水泥窑协同处置技术进行利用。
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| 关 键 词： | 焚烧飞灰 乳酸发酵液 水泥窑协同处置 不可溶氯 重金属 |
| 收稿时间： | 2020-12-11 |
EFFECT OF LACTIC ACID FERMENTATION BROTH OF FRUIT AND VEGETABLE WASTE ON REMOVAL OF CHLORINE AND HEAVY METALS FROM FLY ASH |
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| Institution: | 1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Chengdu Xingrong Renewable Energy Co., Ltd, Chengdu 610000, China |
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| Abstract: | In this study, the effects of lactic acid fermentation broth and ultrapure water on removal of chlorine from fly ash were compared. The results suggested that 59.3% of water-insoluble chlorine in fly ash could be removed by lactic acid fermentation broth, and the ratio of fly ash entering kiln increased from 0.57% to 1.74% after treatment. Experimental results also demonstrated that the heavy metal content of fly ash after leaching by lactic acid fermentation broth was enriched. However, the heavy metal content in the fly ash residue was still lower than the limit value specified in China's national standard HJ 662—2013. Overall, replacing the water leaching with lactic acid fermentation broth leaching could be effective for the fly ash pretreatment. |
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