Stoichiometry of carbon, nitrogen and phosphorus in wastewater from Romania

F. Pirvu, I. Paun, M. Niculescu, V. Iancu, L. Pascu, F. Chiriac
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Abstract

Water resources crisis can lead to a new concept of wastewater treatment. Wastewater cannot be considered waste but can be a renewable or non-renewable energy source. Nutrients from wastewater could be recycled and not disposed of. A circular economy can be created that can be based on the ability of algae to absorb and store nutrients: carbon (C), nitrogen (N) and phosphorus (P). This study investigates the stoichiometry between carbon, nitrogen and phosphorus in wastewater from three geographical regions of Romania. The concentrations of inorganic nitrogen, total nitrogen, total phosphorus, and total organic carbon were compared and evaluated. Three wastewater sampling points located in different areas were monitored, in the period 2013-2017 for the sampling point located in the central-northern part of the Romanian Plain and in the period 2015-2017 for the other two studied areas. The obtained results showed very high values of total nitrogen concentrations with values between 28.2 mg/L and 107.2 mg/L for the southeastern part of Romania. The values of the stoichiometric ratio’s C/N, C/P, N/P have varied over time with maximums in the autumn and winter seasons which indicates the existence of significant contamination of wastewater. It may be possible in the future to improve the performance of wastewater treatment by adjusting C, N, and P parameters.
罗马尼亚废水中碳、氮、磷的化学计量学研究
水资源危机可以引发一种新的废水处理理念。废水不能被视为废物,但可以是可再生或不可再生的能源。废水中的营养物质可以循环利用而不需要处理。基于藻类吸收和储存碳(C)、氮(N)和磷(P)等营养物质的能力,可以创建循环经济。本研究调查了罗马尼亚三个地理区域废水中碳、氮和磷的化学计量。比较评价了土壤中无机氮、全氮、全磷和总有机碳的浓度。位于不同地区的三个污水采样点在2013-2017年期间监测,位于罗马尼亚平原中北部的采样点在2015-2017年期间监测,其他两个研究区域在2015-2017年期间监测。结果表明,罗马尼亚东南部地区的总氮浓度非常高,在28.2 ~ 107.2 mg/L之间。化学计量比的C/N、C/P、N/P值随时间的变化而变化,在秋冬季节最大,表明存在严重的废水污染。未来有可能通过调整C、N、P参数来改善废水处理性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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