白酒酿造固体废弃物资源化利用新进展

白酒酿造产生的酒糟固体废弃物产量大、富含有机质、储存易腐，处理处置成本高，导致资源化利用效率仍较低。聚焦于2017—2021年关于白酒糟资源化利用的文献，从资源化应用途径及处理技术2个角度综述了研究新进展。研究发现:利用白酒糟制取动物饲料是当前资源化应用的主要方向；处理技术方面，混菌发酵技术对纤维素的降解率为24%~42%，对粗蛋白增率在21%~60%，能有效均衡酒糟饲料制品的养分，应用广泛。近年来白酒糟炭化热解制取生物炭研究进展迅速，生物炭产率在33%~43%。构建白酒酿造、白酒糟制生物炭与作物种植的综合处理体系，可为规模化处理酒糟固废建立新模式。

REVIEW ON RESEARCH PROGRESS OF RESOURCE RECOVERY BAIJIU DISTILLER'S GRAIN

The Chinese baijiu industry is facing a challenge in recycling the distiller's grain, which is featured by large yield, rich organic matters, short-lived storage, and high cost of treatment. This study reviewed new research progress on technologies of distiller's grains processing and utilization, with an emphasis on academic articles published between year 2017 and 2021. Animal feeding is still the mainstream of distiller's grains reutilization. The characteristics of processing technologies development are twofold. The microbial processing technique has been extensively employed with the benefit of balancing nutrients in grain-derived animal fodders by degrading cellulose with a rate of 24% to 42%, and increasing crude protein with a rate of 21% to 60%. Carbonization and pyrolysis of distiller grains to produce biochar is currently a hot topic with great promise, and the rate of biochar production is kept between 33% and 43%. At last, this study proposes a new technology paradigm for large-scale treatment of distiller's grains, in conjunction with baijiu production, biochar production and crop planting, to construct a holistic reutilization.