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符合规范的非化除社区在试点循环SBR中提供了优秀的SND-PR:DO,沉降和回流率对工艺性能的影响

Ghazal Srivastava¹, Naval Kishore Singh², Vinay Kumar Tyagi³

¹Environmental Engineering Group, Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India.

Environmental research

|February 5, 2025

概括

优化测序批量反应堆 (SBR) 操作最大化了营养物质的去除. 在特定条件下,实现了高总 (TN) 和总 (TP) 的去除,展示了有效的同时化,脱化和去除 (SND-PR).

科学领域:

环境工程环境工程
微生物学微生物学
废水处理废水处理

背景情况:

市政废水处理需要有效地去除营养物质,以防止过度缩.
序列批量反应器 (SBR) 系统在优化操作条件以提高处理性能方面提供了灵活性.
了解微生物群落的作用对于实现高营养去除效率至关重要.

研究的目的:

在试点规模的SBR中调查运行条件对营养物质去除的影响.
确定负责同时化,脱化和去除 (SND-PR) 的关键功能微生物.
为了最大限度地提高总 (TN) 和总 (TP) 的去除效率.

主要方法:

经过五个阶段运行试点规模的SBR (100 m3/d),包括启动和四次运行,周期时间可变.
多种循环时间,沉降/总循环时间比 (S/T),循环再循环/总循环时间比 (R/T),以及监测溶解氧 (DO).
分析了TN,TP,COD,BOD和TSS的流入和流出度;确定了主要的微生物种群.

主要成果:

在2小时周期 (运行3) 中,达到75.6%±5.6%的最大TN去除和77.9%±6.3%的TP去除.
最佳条件包括S/T比为0.33,R/T比为0.017 (6.4%),DO水平为0.5-2.5 mg/L.
还观察到COD (87.3%),BOD (92.7%) 和TSS (92.0%) 的高去除效率.
主要的功能性微生物包括化聚酸盐积聚生物 (DPAO) 如Burkholderia,Rhodocyclales和Flavobacterium,以及化剂如Nitrospira和Nitrosomonas.

结论:

操作条件,特别是循环时间和沉/循环比率,显著影响SBR中的营养物质去除.
特定的微生物群落,包括DPAO和化剂,是实现有效的同时化,脱化和去除的关键.
该研究表明,优化SBR系统的潜力是有效的市政废水处理,具有高的营养物质去除率.

关键词:

增强了生物去除的功能.微生物社区的微生物社区.市政废水的城市废水.选择器选择器选择器排序批量反应堆的排序同时进行化和脱化.

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