In this study, the feasibility of promoting the lactic acid (LA) fermentation of food waste (FW) with iron tailings (ITs) addition was explored. The best LA yield was 0.91 g LA/g total sugar when 1 % ITs were added into the system. The mechanisms for promoting LA production were acidification alleviation effects and reduction equivalent supply of ITs. Furthermore, the addition of ITs promoted carbohydrate hydrolysis, and the carbohydrates digestibility reached 88.85 % in the 1 % ITs group. The ITs also affected the microbial communities, gradually replaced as the dominant genus, and results suggested that had a positive correlation with LA production and carbohydrate digestibility. Finally, the complex LAB in FW had significant effects on heavy metal removal from ITs, and the removal efficiency Cr, As, Pb, Cd, and Hg can reach 50.84 %, 26.72 %, 59.65 %, 49.75 % and 78.87 % in the 1 % ITs group, respectively.

中文翻译：

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利用铁尾矿提高食物垃圾乳酸产量的创新方法


在本研究中，探讨了添加铁尾矿（IT）促进餐厨垃圾（FW）乳酸（LA）发酵的可行性。当系统中添加 1% IT 时，最佳 LA 产量为 0.91 g LA/g 总糖。促进LA生产的机制是酸化缓解作用和ITs的当量减少供给。此外，ITs的添加促进了碳水化合物的水解，1%ITs组的碳水化合物消化率达到88.85%。 IT也影响了微生物群落，逐渐取代优势属，结果表明与LA产量和碳水化合物消化率呈正相关。最后，FW中的复合LAB对ITs中的重金属去除效果显着，1次去除Cr、As、Pb、Cd和Hg的效率分别达到50.84%、26.72%、59.65%、49.75%和78.87%。 % IT 组。