Flow Behaviour of Wastewater Contaminants in Compost with Manufactured Sand (M-SAND) Under Layered Conditions

P. Balaganesh, S Shiva Nandhini, K. Moneesh Kumar, S Pooja Ragavi, S Amritha Shankar, M. Vasudevan, N. Natarajan
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Abstract

In order to improve the suitability of recycled water for managing the supply and demand with a sustainable technique, a laboratory-scale column experiment was conducted to comprehend the flow behaviour coming out from varied layers with respect to time and depth. This study deals with transfer of wastewater collected from sewage treatment plant through the multiple layers of river sand, Manufactured sand and compost filled under saturation and breakthrough behaviour was monitored. The purpose of the current study was to evaluate experimentally the ammonia-nitrogen and nitrate-nitrogen transport phenomena of the wastewater effluent collected from a sewage treatment plant with respect to time. The samples taken at regular time intervals were tested for the critical parameters pH, electrical conductivity, ammonia-nitrogen, nitrate-nitrogen and chemical oxygen demand assessed with respect to time. The pH ranges observed were almost consistent with contact time in different beds of column whereas the electrical conductivity reaches a maximum at a specific time up to 5 times greater than the minimum value. The ionic transition in relation to dilution, filtration, oxidation, etc. may be the cause of this. The compost-filled column has the capacity to nitrify the ammonia-nitrogen in wastewater, according to the flow behaviour of the ammonia-nitrogen through the wastewater through the M-sand-filled column. The column containing compost showed lower outlet concentration of wastewater ammonia-nitrogen and higher nitrate-nitrogen compared to the other one. The study is useful in the agricultural sector for predicting interactions between sand, waste water, and compost.
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分层条件下合成砂(M-SAND)堆肥中废水污染物的流动特性
为了通过可持续的技术提高循环水在管理供需方面的适用性,进行了实验室规模的柱实验,以了解从不同层流出的流动行为与时间和深度有关。本研究研究了污水处理厂收集的废水在饱和状态下通过多层河砂、人工砂和堆肥进行转移,并监测了突破行为。本研究的目的是通过实验评价某污水处理厂收集的废水中氨氮和硝酸盐氮随时间的迁移现象。每隔一段时间采集样品,测试关键参数pH、电导率、氨氮、硝酸盐氮和化学需氧量随时间的变化。不同色谱层的pH值范围与接触时间基本一致,而电导率在某一特定时间达到最大值,达到最小值的5倍。与稀释、过滤、氧化等有关的离子跃迁可能是造成这种情况的原因。根据氨氮通过m砂填充柱在废水中的流动特性,堆肥填充柱具有硝化废水中的氨氮的能力。堆肥柱出水氨氮浓度较低,硝态氮浓度较高。这项研究对农业部门预测沙子、废水和堆肥之间的相互作用很有用。
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