Abstract：
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, Lactococcus gradually replaced Streptococcus as the dominant genus, and results suggested that Lactococcus 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.
摘要：
在这项研究中,探讨了铁尾矿(ITs)添加促进餐厨垃圾(FW)乳酸(LA)发酵的可行性。当将1％IT添加到系统中时，最佳的LA产量为0.91gLA/g总糖。促进LA生产的机制是酸化缓解作用和减少IT的当量供应。此外，ITs的加入促进了碳水化合物的水解，1%ITs组碳水化合物消化率达到88.85%。这些IT也影响了微生物群落，乳球菌逐渐取代链球菌成为优势属，结果表明，乳球菌与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中重金属的去除有显著影响，和去除效率Cr，As,Pb,Cd,汞可以达到50.84%，26.72%,59.65%,1%ITs组中49.75%和78.87%，分别。
