蔬菜加工和奶酪制造废水对土壤微生物功能多样性,社区结构和土地处理系统的脱潜力的影响
Geoffrey S Siemering1, Francisco J Arriaga1, Grace A Cagle1
1Department of Soil Science, University of Wisconsin-Madison, Madison, Wisconsin, USA.
概括
废水脱率随着温度的增加而下降,可能会造成地下水污染. 土壤微生物组分析揭示了占主导地位的细菌类,但没有明确的因素解释土地应用系统中的不同脱效率.
科学领域:
- 环境微生物学环境微生物学
- 土壤科学 土壤科学
- 污水处理 污水处理 污水处理
背景情况:
- 来自食品加工的高废水需要有效的处理.
- 土地应用是农村地区常见的处理方法.
- 了解脱是防止地下水污染的关键.
研究的目的:
- 调查废水土地应用系统中土壤微生物对脱的影响.
- 确定影响不同土壤类型脱率的因素.
- 为保护地下水质量的战略提供信息.
主要方法:
- 从奶酪制造,蔬菜加工和农业场所的土壤进行实验室化.
- 在不同温度下对脱率的分析.
- 使用16S rRNA基因测序进行微生物组分析.
- 脂脂肪酸 (PLFA) 分析和土壤呼吸测量.
主要成果:
- 随着工业土壤温度的降低,脱率显著下降.
- 即使在低温下 (75%在2.1°C时),农业土壤也保持了高的脱率.
- 动态细菌,蛋白质细菌和酸性细菌是所有土壤类型中占主导地位的类型.
- 尼特罗斯菌和阿尔法蛋白细菌是占主导地位的类别,类似于其他无化系统.
- 在生物/无生物因素和观察到的脱率差异之间没有明确的相关性.
结论:
- 温度是影响土地应用系统中脱效率的关键因素,特别是在寒冷的月份.
- 虽然微生物群落共享占主导地位的类型,但不同脱率的具体驱动因素仍然不清楚.
- 需要进一步的研究来阐明调节脱的关键因素,以有效地保护地下水.
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