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在活性污泥工艺中增强营养去除,使用有氧颗粒污泥增强策略与基于氨的空气化控制

Masaki Miyake¹, Yoshiaki Hasebe², Kazuki Furusawa³

¹R&D Center, Organo Corporation, 4-4-1 Nishionuma, Minami-ku, Sagamihara, Kanagawa 252-0332, Japan; Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.

|August 16, 2023

概括

在连续流动激活污泥系统中增加有氧颗粒污泥显著改善了营养物质的去除. 基于的气化控制提高了总去除和降低了能源消耗,提供了可持续的废水处理解决方案.

科学领域:

环境工程环境工程
废水处理技术废水处理技术
废水中的微生物生态学

背景情况:

低强度的城市废水处理需要有效地去除营养物质.
连续流动活性污泥 (CFAS) 工艺在实现高营养去除率方面经常面临挑战.
有氧颗粒污泥 (AGS) 具有在废水处理中提高沉降性和污染物去除的潜力.

研究的目的:

为了评估空气颗粒污泥 (AGS) 在持续流动活性污泥 (CFAS) 过程中增加营养物质的有效性.
调查基于氨的通风控制对营养物质去除效率和通风能耗的影响.
评估增强型CFAS系统在处理低强度城市废水方面的整体性能.

主要方法:

一个试点规模的CFAS系统被配置为一个主流反应堆和一个用于AGS生产的侧流反应堆.
主流反应堆的通风控制从溶解氧 (DO) 转换为氨度.
在第三阶段,在主流反应堆中引入了无毒区.

主要成果:

总去除 (TN) 显著改善,在II和III阶段达到50%以上.
基于的气化控制,保持低的DO水平 (<0.5毫克L-1),增强了同时化和脱化 (>40%).
在第三阶段,去除稳定在约80% (第25百分位数),通风效率下降了26-29%.

结论:

该AGS增强策略,加上基于氨的空气控制,显著提高了CFAS系统中营养物质的去除.
这种方法导致了改善的总去除和稳定的去除.
优化过程为城市废水处理提供了更节能,更可持续的解决方案.

关键词:

有氧颗粒性污泥增强战略基于的气化控制器连续流量连续流量.低强度的城市废水.同时进行化和脱.

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