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Evaluation of ozone-based oxidation and solar advanced oxidation treatment of greywater
Journal of Environmental Chemical Engineering ( IF 7.7 ) Pub Date : 2020-08-04 , DOI: 10.1016/j.jece.2020.104309
D.M.A. Alrousan , P.S.M. Dunlop

Reclaiming non-conventional water sources such as greywater is gaining more attention in the light of current and expected water shortage due to the global trend of continued population growth, urbanization, and the impact of climate change. In this work, the degradation of organic matter measured as total organic carbon (TOC) and biochemical oxygen demand (BOD5) in real greywater samples using different ozone-based oxidation and solar advanced oxidation treatments was investigated in a custom-built glass tube reactor combined with a concentrated parabolic collector (CPC). The evaluated processes included ozonation (O3), solar ozonation (O3/solar irradiation), hydrogen peroxide oxidation (H2O2), hydrogen peroxide under solar irradiation (H2O2/solar irradiation), peroxonation (H2O2/O3), and solar peroxonation (H2O2/O3/solar irradiation). Combining different treatment methods with/without exposure to solar irradiation enhanced overall treatment efficiency. The efficiency of the examined processes followed the order: solar peroxonation > solar ozonation > peroxonation > ozonation, while the other processes showed a negligible effect. The highest TOC reduction (58.6%) was observed using solar peroxonation at 41.7 mg O3/min and 0.2 H2O2/O3 molar ratio; the highest BOD5 reduction (29.4%) was observed using solar peroxonation at 41.7 mg O3/min and 0.4 H2O2/O3 molar ratio. We conclude that low-cost advanced oxidation technologies can be effective to remove organic materials providing efficient greywater remediation for reuse applications.



中文翻译:

灰水的臭氧氧化和太阳高级氧化处理评价

鉴于当前和预期的水资源短缺,由于全球人口持续增长,城市化趋势以及气候变化的影响,回收非常规水资源(如灰水)越来越受到关注。在这项工作中,在定制的玻璃管反应器中研究了使用不同的基于臭氧的氧化和太阳高级氧化处理的真实中水样品中以总有机碳TOC)和生化需氧量(BOD 5)衡量的有机物的降解情况。与集中抛物线收集器(CPC)结合使用。评估的过程包括臭氧化(O 3),太阳臭氧化(O 3 /太阳辐射),过氧化氢氧化(H 2 O2),在太阳辐射下(H 2 O 2 /太阳辐射),过氧化作用(H 2 O 2 / O 3)和太阳过氧化作用(H 2 O 2 / O 3 /太阳辐射)下的过氧化氢。将不同的处理方法与/不暴露于太阳辐射相结合,可以提高总体处理效率。所检查过程的效率遵循以下顺序:日光过氧化>日光臭氧化>过氧化>臭氧化,而其他过程的影响可忽略不计。在41.7 mg O 3 / min和0.2 H 2的条件下使用太阳过氧化法观察到最高的TOC减少量(58.6%)。O 2 / O 3摩尔比;在41.7 mg O 3 / min和0.4 H 2 O 2 / O 3摩尔比的情况下,使用太阳过氧化法可观察到最高的BOD 5减少量(29.4%)。我们得出的结论是,低成本的先进氧化技术可以有效去除有机材料,从而为重复使用的应用提供有效的灰水修复。

更新日期:2020-08-04
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