在热带气候地区运行的太阳能污水处理厂(两阶段SBR)的性能评价

IF 0.4 4区环境科学与生态学 Q4 WATER RESOURCES

Engenharia Sanitaria E Ambiental Pub Date : 2022-11-21 DOI:10.1590/s1413-415220210261

Lukas Dufner, T. Selvam, N. Otto, D. Neuffer, Hélio Rodrigues dos Santos

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引用次数: 0

摘要

摘要本文研究了一个小型分散式污水处理厂的性能行为，该厂的太阳能发电能力高达50个人口当量。两级序批式反应器（SBR）由一个输送能量的光伏（PV）系统、一个夜间运行的电池存储和两个反应器罐组成。在157天的实验期内，废水流入量从3增加到4.5和6m3.d−1，污泥龄开始为32±2d，结束为21±2d。不同阶段的结果表明，该系统对生活污水的去除效率和稳定性较高，在试验期间对化学需氧量、氮和磷的去除效率分别达到93±2%、86±4%和93±6%。在过去的51天里，为了节省能源和研究延长的非充气阶段的行为，夜间的充气中断了三个小时。缩短充气阶段有助于延长电池的寿命并降低运营成本，同时仍能满足出口的极限值。

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Performance evaluation of a solar-powered wastewater treatment plant (two-stage SBR) operated in tropical climate regions

ABSTRACT This article investigates the performance behaviour of a small decentralized wastewater treatment plant with a capacity of up to 50 population equivalents powered by solar energy. The two-stage sequencing batch reactor (SBR) consists of a photovoltaic (PV) system to deliver energy, a battery storage for night operation and two reactor tanks. In the experimental period of 157 days, the wastewater inflow was increased from 3 to 4.5 and 6 m3.d−1, with sludge ages of 32 ± 2 d in the beginning and 21 ± 2 d in the end. The results corresponding to the different phases indicated high efficiency and stability of the system with domestic wastewater, reaching efficiencies of the test periods of 93 ± 2%, 86 ± 4% and 93 ± 6% for removal of chemical oxygen demand, nitrogen and phosphorus, respectively. In the last 51 days, aeration in the night was interrupted for three hours to save energy and study the behaviour of extended non-aerated phases. A shortening of the aeration phases can help to extend the lifetime of batteries and reduce operational costs, while limiting values in the outlet are still met.

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