One-Step Reverse Osmosis Based on Riverbank Filtration for Future Drinking Water Purification

Zhai, Yujia; Liu, Gang; Meer, W.G.J. van der

doi:10.1016/j.eng.2021.02.015

Cited by 21 publications

(11 citation statements)

References 67 publications

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“…Overall, the operational cost for deep defluoridation was estimated as 0.574 RMB per ton of groundwater. As a comparison, the operational cost for the decentralized reverse osmosis system was in the range of 5–10 RMB per ton water. , …”

Section: Resultsmentioning

confidence: 99%

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Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

Deng

Cheng

et al. 2022

ACS EST Eng.

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Fluoride contamination in groundwater is a global issue. Nanoscale oxides of Zr(IV), Al(III), and Ti(IV) can form the inner-sphere complex with fluoride through ligand exchange, offering a new chance for efficient groundwater purification. However, pilot-scale field demonstration of nanotechnology in groundwater defluoridation is very rare. Herein, we conducted a 150-day field defluoridation study using the nanocomposite HZO@D201, which was prepared by encapsulating nano-hydrated zirconium oxide (HZO) inside the strongly basic anion exchanger D201. The HZO@D201 beads were packed in five-stage series columns (40 L for each column), and the groundwater was pumped through the columns sequentially. The effective treatment amount for the single column ([F–] < 1.0 mg/L) exceeded ∼3000 bed volume (BV). The exhausted HZO@D201 was fully refreshed through ex situ treatment with NaOH–NaCl solution for repeated use without significant loss in defluoridation reactivity. Owing to the specific interaction with HZO, the fluoride concentration could be steadily reduced below 1.0 mg/L throughout the 150-day field demonstration, while the common anions coexisting in groundwater (K+, Na+, Ca2+, Mg2+, SO4 2–, Cl–, etc.) remained almost unchanged. The operational cost for deep defluoridation was estimated as 0.574 RMB per ton of groundwater, much less than that of the widely studied reverse osmosis. TEM, XPS, and Fourier transform infrared (FTIR) analysis indicated that negligible change occurred in the structure and chemical composition of HZO@D201 after the long-term field assay. This study may inspire more attempts at the pilot scale and engineering demonstration of nano-enabled water treatment techniques.

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Section: Resultsmentioning

confidence: 99%

“…As a comparison, the operational cost for the decentralized reverse osmosis system was in the range of 5−10 RMB per ton water. 52,53 Evolution of the Nanocomposite Structure. After the 150-day field study, the structure evolutions of HZO@D201 are recorded in Figure 7.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

Deng

Cheng

et al. 2022

ACS EST Eng.

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“…In the literature, one can find evidence of the successful application of nutrient recovery and concentration using RO [ 143 ], UF-RO [ 144 ], MF-NF [ 145 ], or NF-RO [ 20 ] processes. For example, Samantha et al [ 145 ] reported that the MF-NF treatment train in a dead-end filtration system produced a particle-free product water from raw pig manure.…”

Section: Modern Trends In Nutrients Recoverymentioning

confidence: 99%

Recovery of Nutrients from Residual Streams Using Ion-Exchange Membranes: Current State, Bottlenecks, Fundamentals and Innovations

2022

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The review describes the place of membrane methods in solving the problem of the recovery and re-use of biogenic elements (nutrients), primarily trivalent nitrogen NIII and pentavalent phosphorus PV, to provide the sustainable development of mankind. Methods for the recovery of NH4+ − NH3 and phosphates from natural sources and waste products of humans and animals, as well as industrial streams, are classified. Particular attention is paid to the possibilities of using membrane processes for the transition to a circular economy in the field of nutrients. The possibilities of different methods, already developed or under development, are evaluated, primarily those that use ion-exchange membranes. Electromembrane methods take a special place including capacitive deionization and electrodialysis applied for recovery, separation, concentration, and reagent-free pH shift of solutions. This review is distinguished by the fact that it summarizes not only the successes, but also the “bottlenecks” of ion-exchange membrane-based processes. Modern views on the mechanisms of NH4+ − NH3 and phosphate transport in ion-exchange membranes in the presence and in the absence of an electric field are discussed. The innovations to enhance the performance of electromembrane separation processes for phosphate and ammonium recovery are considered.

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“…Identical analytical measurement was conducted for the RO permeates (ROP) obtained from the AnMBR and AeMBR effluents (Table 2). The average pH of the RO permeate from the AnMBR (6.0) and AeMBR (5.8) effluents were slightly lower than the Singapore's PUB NEWater standard requirement (7.0-8.5) [48], which could be stabilised by adding lime [6] or blending with another source of water [20,32]. Significant removal of TDS, COD, NH 3 -N (AnMBR), NO 3 -N (AeMBR), Or-N, TN, PO 4 -P, and TOC were found for both permeates and a complete non detectable BOD 5 was achieved, while the TDS for AnMBR and AeMBR permeates was respectively lower than the threshold in PUB NEWater standard [48].…”

Section: Ro Performance With Anmbr and Aembr Effluents 321 Indirect P...mentioning

confidence: 99%

A Comparative Evaluation of Reverse Osmosis Membrane Performance When Combined with Anaerobic or Aerobic Membrane Bioreactors for Indirect Potable Reuse Applications

Huang¹,

Jeffrey²,

Pidou³

2022

SSRN Journal

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One-Step Reverse Osmosis Based on Riverbank Filtration for Future Drinking Water Purification

Cited by 21 publications

References 67 publications

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

Pilot-Scale Field Demonstration of Environmental Nanotechnology for Groundwater Defluoridation

Recovery of Nutrients from Residual Streams Using Ion-Exchange Membranes: Current State, Bottlenecks, Fundamentals and Innovations

A Comparative Evaluation of Reverse Osmosis Membrane Performance When Combined with Anaerobic or Aerobic Membrane Bioreactors for Indirect Potable Reuse Applications

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