School of Engineering and Advanced Technology, Massey University, Private Bag 11-222, Palmerston North, New Zealand.
School of Engineering and Advanced Technology, Massey University, Private Bag 11-222, Palmerston North, New Zealand.
Water Res. 2018 Apr 1;132:301-308. doi: 10.1016/j.watres.2018.01.013. Epub 2018 Jan 8.
Waste stabilization ponds (WSP) are one of the most common forms of wastewater treatment for smaller communities globally, but have poor phosphorus removal. It is known that WSP algae can accumulate polyphosphate within their cells in excess of that needed for cell function. If polyphosphate accumulation could be triggered at the higher range of WSP cell concentrations, phosphorus removal from domestic wastewater could be significantly improved. However, this phenomenon is sporadic and still not fully understood. With a view of building a fundamental understanding to underpin the engineering of a new phosphorus removal process, this paper examines eight previously untested variables that may influence the cellular phosphorus content of WSP biomass. Although calcium, magnesium, and potassium are key constituents of polyphosphate granules, the concentrations tested were not limiting to polyphosphate accumulation. While literature also pointed to inoculum characteristics as potentially having an impact, no significance was found in this research. Conversely, three important new triggers where identified that significantly (90% confidence) affected the cellular phosphorus content of WSP biomass. An increase in cellular phosphorus content was triggered by decreasing the organic load, or allowing the pH to increase as compared to pH control. By contrast, the presence of mixing decreased the phosphorus content of the WSP biomass.
污水稳定塘（WSP）是全球较小社区最常用的废水处理形式之一，但除磷效果不佳。已知 WSP 藻类可以在其细胞内积累超过细胞功能所需的多磷酸盐。如果可以在 WSP 细胞浓度的较高范围内触发多磷酸盐的积累，那么生活污水的除磷效果可以得到显著提高。然而，这种现象是零星的，仍未被完全理解。为了建立对工程学新除磷过程的基础理解，本文研究了八个以前未经测试的变量，这些变量可能影响 WSP 生物量的细胞磷含量。尽管钙、镁和钾是多磷酸盐颗粒的关键成分，但测试的浓度对多磷酸盐的积累没有限制。虽然文献还指出接种物特性可能具有影响，但本研究未发现其重要性。相反，确定了三个重要的新触发因素，这些因素显著（90%置信区间）影响了 WSP 生物量的细胞磷含量。降低有机负荷或允许 pH 值升高而不是 pH 值控制会触发细胞磷含量增加。相比之下，混合的存在会降低 WSP 生物量的磷含量。
