高性能多阶段令人困惑的A2O处理工艺,用于高原上的家用污水处理
Yang Wu1, Dakai Zhou1, Yongze Lu2
1School of Energy and Environment, Southeast University, Nanjing 210096, China.
Water research
|November 13, 2024
概括
一种新的废水处理工艺有效地消除了高海拔地区的污染物,尽管温度低,氧气低. 这种多阶段令人困惑的A2O系统增强了微生物活动,并降低了在具有挑战性的环境中高效,经济的废水管理的运营成本.
科学领域:
- 环境工程 环境工程
- 废水处理技术 废水处理技术
- 高海拔环境科学 环境科学
背景情况:
- 高海拔污水处理厂 (WWTP) 面临着低气压,氧气减少和冷温度的挑战,限制了效率.
- 现有的WWTP在像西这样的高海拔地区普遍存在的恶劣条件下努力保持最佳性能.
研究的目的:
- 为高海拔环境提出和测试一种新的多阶段混的无氧-无毒-氧 (A2O) 废水处理工艺.
- 评估系统在低温条件下消除化学氧需求 (COD),总 (TN) 和总 (TP) 的效率.
- 评估操作参数对微生物群落结构的影响以及非化去除 (DPR) 的有效性.
主要方法:
- 在西实施一个试点工厂规模的多阶段令人困惑的A2O系统.
- 在不同影响负荷和低温 (10.0-11.0°C) 下进行测试.
- 监测操作参数,包括液压保留时间 (HRT),反流率,溶氧 (DO) 和通风需求.
- 对COD,TN,氨 (NH4+-N) 和TP的废水质量的分析.
- 微生物社区结构分析和功能基因的量化.
- 污泥的特征,包括污泥体积指数 (SVI) 和总含量.
主要成果:
- 该系统符合COD,TN,NH4+-N和TP的第1类A级排放标准 (GB 18918-2002).
- 无化去除 (DPR) 对和去除的贡献超过50%.
- 观察到微生物群落多样性的增强和关键功能基因 (AOB,NOB) 的丰富性.
- 多级混结构促进了高污泥储存,提高了低温耐受性和系统稳定性.
- 间歇性操作抑制了丝状细菌的积聚,使SVI保持在120mL/g以下.
- 长时间的污泥保留时间 (SRT) 和减少的通风要求降低运营成本.
结论:
- 新的多阶段令人困惑的A2O系统为高海拔地区的废水处理提供了高效和成本效益的解决方案.
- 该系统的设计增强了微生物活动和污泥储存,确保在低温条件下稳定的性能.
- 这种方法为在具有挑战性的高海拔环境中可持续废水管理提供了一个可行的战略.
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