Pilot study on the treatment of lake water with algae by ultrafiltration–ozone–biologically activated carbon

Xu, Pengcheng; Yan, Chen; Gui, Bo; Guo, Xiaolong; Zhang, Jian

doi:10.2166/aqua.2021.041

Cited by 2 publications

(1 citation statement)

References 47 publications

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“…Different water sources show a range of quality parameters-for example, their pH ranges from 7.1 to 8.7, and they have been treated using various methods like ozonation, ozonation + activated carbon, and ozonation + permanganate. The majority of the investigations were conducted in laboratories; however, some field works [17] have been conducted, too. It has generally been concluded that no ideal ozone dose has been found for algae treatment in all water bodies.…”

Section: Introductionmentioning

confidence: 99%

A Desktop Assessment of Ozone Micro-Nanobubble Technology for Algae and PFAS Removal from Surface Water Bodies Using Open-Source Water Quality Data

Aber,

Aguada,

Marasinghe

et al. 2024

Sustainability

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Ozone is an excellent oxidant and helps in breaking down both organic and inorganic compounds; this effect is further enhanced when it decomposes into hydroxyl radicals. Several studies confirm the good performance of ozonation and micro-nanobubble technology in eradicating algae and per- and poly-fluoroalkyl substances. However, very little is known about the application of ozone micro-nanobubble technology in small-scale treatment; hence, this research aims to assess the potential of this technology. A survey was performed to obtain the water quality parameters of some selected water bodies via relevant open-source databases. The water quality was compared against the Environmental Protection Authority (EPA) guidelines to identify those that did not meet the criteria and it was identified that 18% of the surface water bodies were below the recommended guidelines. The identified water sources were then used for the treatment simulation, which applies the literature-reported % removal of water quality parameters to predict the effectiveness of ozone micro-nanobubble technology for the selected water sources in this study. Furthermore, the time (dose) that is needed for the treatment using this technology was estimated based on the surface area of the water bodies. The scalability study was conducted to assess how many water bodies could be treated within a day using a 50 m3/h flow rate, which yielded a value of 27%. It was concluded that ozone micro-nanobubble technology can treat algae and per- and poly-fluoroalkyl substances in surface waters as part of their treatment process by reducing treatment frequency and environmental impacts. By observing the benefits of ozone micro-nanobubble technology, there is a considerable chance that the surface water bodies in the City of Salisbury and, therefore, other small-scale water treatment plants, will be healthier after undergoing this process. This study demonstrated the advantages of applying open-source water quality data as a quick approximation of the evaluation of new treatment techniques, which will help engineers to better predict the performance of the designed field trials.

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Section: Introductionmentioning

confidence: 99%

A Desktop Assessment of Ozone Micro-Nanobubble Technology for Algae and PFAS Removal from Surface Water Bodies Using Open-Source Water Quality Data

Aber,

Aguada,

Marasinghe

et al. 2024

Sustainability

View full text Add to dashboard Cite

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Combining Full-Scale Ozonation and Biological Activated Carbon Filtration (O3-BAC) with Pilot-Scale Nanofiltration (NF) to Control Disinfection By-Product Formation for Treatment of Taihu Lake Water

Tian

et al. 2023

Water

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Nanofiltration (NF) membranes, which can consistently offer safe and reliable water quality, have become increasingly popular in drinking water treatment. In this study, the conventional (coagulation-sedimentation-sand filtration) and ozonation-biologically activated carbon filtration (O3-BAC) advanced treatment processes at a full-scale drinking water treatment plant (DWTP) were combined with a pilot-scale NF process for treatment of Taihu Lake water. The results showed that the “conventional + O3-BAC + NF” combined processes had superior effects on removing natural organic matter (NOM), Br−, and other common water quality parameters (e.g., turbidity, conductivity, TDS, and total hardness) with efficiencies of 88.8‒99.8%, for which the NF process played a critical role. The conventional plus O3-BAC processes effectively removed formation potential of chlorinated disinfection by-products (Cl-DBPFPs, by 28.0–46.6%), but had poorer effect in reducing formation potential of brominated DBPs (Br-DBPFPs, by −2637.2–17.3%). NOM concentrations (characterized by dissolved organic carbon (DOC), ultraviolet absorbance at 254 nm (UV254), and/or fluorescent components) were the driving factors for most DBPFP species, while elevation of [Br−]/[DOC] ratio likely resulted in enhanced formation of brominated trihalomethanes (THMs) during chlorination of the BAC effluent. By adding the pilot-scale NF process, the “conventional + O3-BAC + NF” treatment train effectively controlled DBPFP, yielding the removal efficiencies of Cl-DBPFP and Br-DBPFP as 77.6–100% and 33.5–100%, respectively, with monochloroacetic acid, mono-bromo-acetic acid, and tribromomethane formation potentials (MCAA-FP, MBAA-FP, and TBM-FP) not detected in the final effluent. Low temperature in the winter season might be the primary reason for the rapid increase of transmembrane pressure when operating the NF membrane under flux of 25 L/(m2·h), which could be largely delayed by lowering the flux to 20 L/(m2·h). Characterization of the membrane cleaning solutions showed that macromolecular biopolymers (6000 Da‒4000K Da) such as polysaccharides and proteins were the main contributors to membrane fouling.

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Pilot study on the treatment of lake water with algae by ultrafiltration–ozone–biologically activated carbon

Cited by 2 publications

References 47 publications

A Desktop Assessment of Ozone Micro-Nanobubble Technology for Algae and PFAS Removal from Surface Water Bodies Using Open-Source Water Quality Data

A Desktop Assessment of Ozone Micro-Nanobubble Technology for Algae and PFAS Removal from Surface Water Bodies Using Open-Source Water Quality Data

Combining Full-Scale Ozonation and Biological Activated Carbon Filtration (O3-BAC) with Pilot-Scale Nanofiltration (NF) to Control Disinfection By-Product Formation for Treatment of Taihu Lake Water

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