Assessment of recycled glass and expanded clay in a dual media configuration for drinking water treatment

Cescon, Anna; Jiang, Jia‐Qian; Haffey, Mark; Moore, Graeme; Callaghan, Kevin

doi:10.1080/01496395.2016.1209522

Cited by 6 publications

(4 citation statements)

References 23 publications

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“…Recent research by authors [61] demonstrated that the glass media configurations granted similar performance in relation to that of sand/anthracite in terms of the removal of particles and organic contents. However, a slower head loss development with glass media configurations (both Filtec/Filtralite and AFM/Filtralite) was observed [60]; final head loss values of glass media were more than 60% lower than those obtained by sand/anthracite (Figure 8).…”

Section: Glass-based Mediamentioning

confidence: 99%

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Filtration Process and Alternative Filter Media Material in Water Treatment

Cescon

Jiang

2020

Water

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In drinking water treatment, filtration plays an important role in the multi-barrier approach employed for the removal of pathogens. The presence of suspended solids and other particulate matter in water increases the resistance of most microbes to disinfection. Therefore, high performance in the removal of particles achieved by granular filtration can increase the disinfection efficiency. Although sand is one of the major filter media, alternative media have been developed and used in recent years. In this review, the performance of alternative media is compared with traditional sand/anthracite for drinking water treatment. Advantages in the use of alternative media, especially glass media, have been found, including high filtration performance in removing residual particles and turbidity, minor modification requirements to the existing filtration configuration and slow head loss development. However, before the employment of them in industry, additional tests are recommended. In particular, full scale tests with variations in the operating conditions and analyses of pathogen removal should be performed. Moreover, this paper reviews the filtration processes and operating configurations which provide overall references to those who are studying and working in the field of water technology and treatment. In this paper, legislations/standards of safe drinking water are summarized as they are the driving force of developing new treatment technologies; mathematical modules for predicting the media filtration performance are briefed. Finally, future work on the application of alternative filter media is recommended.

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Section: Glass-based Mediamentioning

confidence: 99%

“…Head loss development in four dual media configurations for the entire run with poly-aluminium chloride as coagulant (reprepared using the data from[61]). …”

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confidence: 99%

Filtration Process and Alternative Filter Media Material in Water Treatment

Cescon

Jiang

2020

Water

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“…A typical water treatment plant consists of aeration, coagulation, flocculation, sedimentation, filtration, chlorination and distribution units. The treatment is necessitated by the possible pressure of some impurities such as dissolved gases, dust, minerals, organic matter, microorganisms and other pollutants (Cescon et al, 2016). This research focuses on the filtration unit that removes mainly suspended solids, microbes, mineral, colour and taste.…”

Section: Introductionmentioning

confidence: 99%

“…Filtration is a mechanical or physical operation which is used for the separation of solids from fluids by interposing a medium to fluid flow through which the fluid can pass, but the solids in the fluid are retained. This separation depends on the pore size and the thickness of the medium as well as the mechanism that occurs during filtration (Cescon et al, 2016). Gravity filters consist essentially of an open topped box usually made of concrete, drained at the bottom and partially filled with a filter medium.…”

Section: Introductionmentioning

confidence: 99%

Study of Water Filtration Without Chemical Pre-Treatment

Jeje¹

2023

International Journal of Mechanical and Civil Engineering

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This research work focused on studying water purification without chemical pre-treatment. In the studies, alternative approaches were carried out to develop a filter bed suitable for filtering water without the use of chemical treatments that is also cost effective. Polyvinyl Chloride (PVC) pipes (100 × 1700) mm were used as filter boxes. The experiment carried out during the study was divided into two major parts; that is slow sand and rapid sand filter parameters. The slow sand filter consisted of two filter pipes, one consisting of a stratified layer of sand of size range of 0.20 – 0.60 mm with a depth of 700 mm as filter medium. The turbidity, filtration rate and head loss of the effluent across the filter were monitored for 15 days. It was found that slow sand filter plus granular activated carbon (GAC) and rapid sand filter plus GAC were more effective in the removal of turbidity. Turbidity reduced with the increase in time. Rapid sand filter was found to be the least effective in the removal of bacteria while slow sand filter plus GAC was the most effective. The slow sand filter unit gave a very high coliform count compared to other filter units. It was found that the filtration rate plays a vital role in the mechanism of filtration.

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