Lake Water Treatment Using Green Wall System: Effects of Filter Media Ratio and Lake Water Flow Rate on Treatment Performance

Chua, Guan Xuan; Oh, Kai Siang; Yoon, Li Wan; Tee, Lee Hong

doi:10.1007/s41101-020-00091-9

Cited by 2 publications

(4 citation statements)

References 25 publications

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“…The greenwall system was created in a semi-open area with plenty of natural light, but with an impermeable roof to keep heavy rains from affecting the quality of the lakewater. In Malaysia, the average daytime temperature varies from 25 to 30°C [2].…”

Section: Greenwall Setupmentioning

confidence: 99%

“…The treated effluent was collected from the system after 3 hours of filtering. To ensure system homogeneity, a measuring cylinder was used to collect 20 ml of lakewater as the average outflow sample from each outlet [2]. The treated lakewater samples were maintained in clean sampling vials throughout the study.…”

Section: Greenwall Setupmentioning

confidence: 99%

“…The best-fit lines that described the pollutant elimination using both the Langmuir and Freundlich isotherms were generated using the data collected from the experiment. The Langmuir model for adsorption is shown in equation (2).…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…The permitted nitrogen and phosphorus concentrations in freshwater are approximately 0.25 ppm for nitrogen and less than 0.5 ppm of phosphorus for water bodies containing aquatic plants. An excessive amount of nutrients could result in algae blooming, at the same time hindering light penetration to deeper waters that eventually led to oxygen depletion in lakewater [2]. As a result, effective water treatment is necessary to control the physical, chemical, and biological contaminants in lakewater.…”

Section: Introductionmentioning

confidence: 99%

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Greenwall Filtration System for Lakewater Treatment: A Case Study on Cocopeat/Perlite Filter Media

Gan,

Tee,

et al. 2023

J. Phys.: Conf. Ser.

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Anthropogenic activities often result in varying degrees of lakewater contamination. Conventional lakewater treatment processes require expansive space allocation which could be challenging under certain topographical situations. A greenwall filtration system is a vertical wall that consists of plants or greenery. In this system, greenery is planted in a growing medium made up of a combination of soil, stone, or water. A robust greenwall filtration system could serve as a potential solution for lakewater treatment. However, the efficacy of various filtering media in eliminating contaminants and various water quality indicators such as Chemical Oxygen Demand (COD) from lakewater remains unknown. Previous research has demonstrated that coir and perlite are suitable filter media for a greenwall system. In this study, the effects of various height ratios of the filter media and different lakewater flowrates were investigated. The treatment performance was assessed using various lakewater flowrates: low flowrate (13.10 L/h), medium flowrate (26.57 L/h) and high flowrate (45.18 L/h). The mixed media ratio of 3:1 cocopeat-to-perlite during low flowrate (13.10 L/h) attained the highest removal of COD with an overall removal of 71.00%. It was further discovered that the Langmuir isotherm model could better explain the adsorption process than the Freundlich isotherm model as it possesses an overall high coefficient of determination, R2 where the value of R2 for cocopeat to perlite ratio at 1:1, 1:3, and 3:1; are 0.9397, 0.9823, and 0.5348, respectively.

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Section: Greenwall Setupmentioning

confidence: 99%

Section: Greenwall Setupmentioning

confidence: 99%

Section: Adsorption Isothermmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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