Evaluation of Dissolved Organic Matter Removals through WWT and SAT Using Pilot-Scale and Lab-Scale Reactors

Takabe, Yugo; Kameda, Ippei; Suzuki, Ryosuke; Nishimura, Fumitake; Kusuda, Yasunari; Phattarapattamawong, Songkeart; Itoh, Sadahiko

doi:10.1007/s11270-019-4182-1

Cited by 2 publications

(1 citation statement)

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“…In the vadose zone, biochemical and physical processes occur that foster compound degradation and thereby improve the quality of the recovered water [10,11]. The compounds underlie filtration, adsorption and biodegradation, which have been demonstrated to remove pathogens, nutrients, dissolved organic matter and organic compounds such as the contaminants of emerging concern (CECs) [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Removal of Contaminants of Emerging Concern through Hydraulic Adjustments in Soil Aquifer Treatment

Sallwey

Jurado

Barquero

et al. 2020

Water

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Water reclamation through the use of soil aquifer treatment (SAT) is a sustainable water management technique with high potential for application in many regions worldwide. However, the fate of contaminants of emerging concern (CECs) during the infiltration of treated wastewater during SAT is still a matter of research. This study investigates the removal capacity of 27 CECs during SAT by means of infiltration experiments into a 6 m soil column. Additionally, the influence of the hydraulic operation of SAT systems on the removal of CECs is investigated by changing the wetting and drying cycle lengths. Sixteen out of 27 CECs are efficiently removed during SAT under various operational modes, e.g., bezafibrate, diclofenac and valsartan. For six substances (4-methylbenzotriazole, amidotrizoic acid, benzotriazole, candesartan, hydrochlorothiazide and sulfamethoxazole), removal increased with longer drying times. Removal of amidotrizoic acid and benzotriazole increased by 85% when the drying cycle was changed from 100 to 444 min. For candesartan and hydrochlorothiazide, removal improved by 35%, and for 4-methylbenzotriazole and sulfamethoxazole, by 57% and 39%, respectively. Thus, enhanced aeration of the vadose soil zone through prolonged drying times can be a suitable technique to increase the removal of CECs during SAT.

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