Drinking water treatment residual as a ballast to sink Microcystis cyanobacteria and inactivate phosphorus in tropical lake water

Huser, Brian; Thongdamrongtham, Somjate; Padungthon, Surapol; Junggoth, Rittirong

doi:10.1016/j.watres.2021.117792

Cited by 14 publications

(5 citation statements)

References 103 publications

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“…The results from this study showed that spent lime DWTR generated from water softening offers a valuable, low-cost material capable of protecting water bodies from the threat of legacy and other sources of P in stormwater runoff. The results add to the growing number of proposed uses for DWTRs for the purpose of lake restoration, including as a bed for constructed wetlands [43], as a sorbent for flow-through treatment of eutrophic water [44], and as a P sorbing ballast in "flock and lock" treatment [45]. This study also provided valuable long-term data from a full-scale field application, allowing for the determination of true P removal performance under in-situ conditions, rather than laboratory data, which can overestimate performance by orders of magnitude [34].…”

Section: Discussionmentioning

confidence: 79%

Field Application of Spent Lime Water Treatment Residual for the Removal of Phosphorus and other Pollutants in Urban Stormwater Runoff

Pilgrim¹,

Kuster²,

Huser

2022

Water

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The threat of anthropogenic eutrophication and harmful algal blooms in lakes requires the development of innovative stormwater best management practices (BMPs) to reduce the external loading of phosphorus (P). This paper presents the findings of a 5-year study of a full-scale P removal structure constructed in Minnesota, USA with spent lime drinking water treatment residual (DWTR), a by-product of water softening at a local water treatment plant. Influent and effluent water samples were collected by auto-samplers during 43 storm events during the growing season. Samples were analyzed for P constituents, heavy metals, total suspended solids (TSS), and pH. Toxicity of the effluent was assessed using Ceriodaphnia dubia. Flow-weighted removal effectiveness was calculated for each storm event. Overall, the spent lime DWTR reduced total P loading by 70.9%, dissolved reactive P by 78.5%, dissolved P by 74.7%, and TSS by 58.5%. A significant reduction in heavy metals was also observed. Toxicity tests indicated the aquatic toxicity of the effluent treated with spent lime DWTR was not different from untreated stormwater. This study provided long-term real-world data that demonstrated that a full-scale P removal structure with spent lime DWTR significantly reduced P and other pollutants in stormwater discharging to an urban lake. Therefore, spent lime DWTR, which is currently treated as a waste product, is a promising filter material for stormwater treatment.

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Section: Discussionmentioning

confidence: 79%

Field Application of Spent Lime Water Treatment Residual for the Removal of Phosphorus and other Pollutants in Urban Stormwater Runoff

Pilgrim¹,

Kuster²,

Huser

2022

Water

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“…The present study provides valuable insights into the influence of surface area, pore volume, and heavy metal content on the phosphorus adsorption capacity of MDWTR samples with different particle sizes. The observed increase in surface area, particularly in the MDWTR-S sample, indicates enhanced adsorption capacity compared to the Raw-DWTR, suggesting that modifying the surface area of MDWTR can improve its adsorption efficiency (Kuster, Huser, Thongdamrongtham, et al, 2021). Additionally, the presence of micropores further contributes to the adsorption performance of MDWTR samples.…”

Section: Discussionmentioning

confidence: 92%

A Breakthrough Approach for Superior Cyanobacteria (<i>Microcystis aeruginosa</i>) Removal and Phosphorus Adsorption

Thongdamrongtham,

Junsiri,

Mongkol

et al. 2024

Ecol. Eng. Environ. Technol.

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This study examines the effectiveness of modified drinking water treatment residue (MDWTR) in removing Microcystis aeruginosa, as well as its collaborative action with poly aluminium chloride (PAC) for effective contaminant removal. In addition, the phosphorus adsorption capacities of MDWTR samples with differing particle sizes are evaluated. The results indicate that MDWTR alone has a positive effect on Microcystis aeruginosa removal, with S-type MDWTR(<90 µm) exhibiting the highest removal efficiency. Moreover, when combined with PAC, MDWTR's removal efficiency is significantly enhanced, further validating its efficacy. The analysis of isotherms provides strong evidence for the substantial adsorption capacities of MDWTR samples, with various MDWTR types exhibiting distinct affinities. These results demonstrate MDWTR's potential as adsorbent, Microcystis aeruginosa removing and emphasise its versatility in water treatment applications.

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“…1 ). DWTR was chosen as a representative P-inactivating material owing to its relatively high concentrations of aluminum and iron, which endow it with a high potential in controlling lake internal P pollution ( Kuster et al., 2021 , 2023 ) and have been reported to be mainly in relatively stable forms ( Wang and Jiang, 2016 ). The use of DWTR enabled the elimination of interferences that might arise from the migration of metals from the material to the sediment, as confirmed in the Results and Discussion section.…”

Section: Methodsmentioning

confidence: 99%

Phosphorus migration from sediment to phosphorus-inactivating material: A key process neglected by common phosphorus immobilization assessments for lake geoengineering

Wang,

Shen,

Fan

et al. 2023

Water Research X

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Drinking water treatment residual as a ballast to sink Microcystis cyanobacteria and inactivate phosphorus in tropical lake water

Cited by 14 publications

References 103 publications

Field Application of Spent Lime Water Treatment Residual for the Removal of Phosphorus and other Pollutants in Urban Stormwater Runoff

Field Application of Spent Lime Water Treatment Residual for the Removal of Phosphorus and other Pollutants in Urban Stormwater Runoff

A Breakthrough Approach for Superior Cyanobacteria (<i>Microcystis aeruginosa</i>) Removal and Phosphorus Adsorption

Phosphorus migration from sediment to phosphorus-inactivating material: A key process neglected by common phosphorus immobilization assessments for lake geoengineering

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