Laboratory of Biochemistry of Parasitism and Environmental Microbiology (LBPMA), Institute of Chemistry and Biotechnology (IQB), Federal University of Alagoas (UFAL), Maceió, AL, 57072-900, Brazil.
Environ Sci Pollut Res Int. 2020 Apr;27(10):10275-10285. doi: 10.1007/s11356-020-07634-6. Epub 2020 Jan 13.
All processes in agro-industries consume water and generate large volumes of nutrient-rich effluents. To recycle effluents from a sugar-alcohol industry in the Northeastern Brazil (Coruripe, Alagoas), the effect of a daily application of a microbial formulation (containing five indigenous bacteria and two fungi), at the entrance of the two first facultative ponds (D, E) of its treatment plant formed by seven ponds (A-G), was evaluated in the sugarcane harvests of 2014/2015 and 2015/2016. Fortnightly, the values of 11 physicochemical parameters were checked and statistically compared (one and two-way ANOVA) in untreated (sedimentation pond A) and post-treated effluent (last facultative pond G), during both harvests. The treated effluent presented statistically significant improvements (p > 0.05), even between harvests, with averages of removal of organic matter of ca. 79.21% and 90.62%, and increases of the dissolved oxygen (DO) of ca. 72% and 74%, as well as the average increase of pH was ca. 42% and 50%. This better quality residue generally satisfied the class III level of the Brazilian Resolution 357/2005 (National Council for the Environment (CONAMA)), for water reuse in sugarcane irrigation on the yellow clay latosol soil, since it still is a light source of organic matter, nitrites and phosphorus, reducing the need of fertilizers for maintaining the productivity with low risk of salinization. According to Pearson's bivariate correlation coefficient, while the DO and pH have positive correlation, they both have general inverse relation with the other physicochemical parameters evaluated and vice versa.
农业产业的所有过程都消耗水并产生大量富含营养的废水。为了回收巴西东北部（阿拉戈斯州的科鲁里佩）的酒精糖工业的废水，在 2014/2015 和 2015/2016 两个甘蔗收获季中，在处理厂的七个池塘（A-G）中前两个兼性池塘（D、E）的入口处，每天应用一种微生物制剂（含有五种本土细菌和两种真菌），评估了其效果。每两周检查一次 11 个物理化学参数的值，并在未处理（沉淀池 A）和后处理废水（最后一个兼性池塘 G）中进行统计比较（单因素和双因素方差分析）在这两个收获季中。处理后的废水表现出统计学上的显著改善（p>0.05），即使在收获季之间也是如此，有机物去除率平均约为 79.21%和 90.62%，溶解氧（DO）增加约 72%和 74%，以及 pH 值的平均增加约为 42%和 50%。这种质量更好的残留液通常满足巴西第 357/2005 号决议（国家环境委员会（CONAMA））的 III 类标准，可用于在黄粘土棕壤上灌溉甘蔗的水再利用，因为它仍然是有机物、亚硝酸盐和磷的轻污染源，减少了维持生产力的化肥需求，同时降低了盐化风险。根据皮尔逊二元相关系数，尽管 DO 和 pH 值呈正相关，但它们与评估的其他物理化学参数普遍呈反向关系，反之亦然。
