Treatment Study of the Turbid Water by High-Speed Synthetic Fiber Filter System

The rapid sand downflow filter is widely used in water treatment plants. On the other hand, this filter has some drawbacks included the significant development of the head loss via the filter media because most of the rejected particles are removed by the upper layers. As well, the filter particles are redistributed during the backwash process causing the settling of fine particles on the upper part of the filter media, and this needs to increase the number of backwash processes. For these reasons, the cost of the produced water increases. The aim of the present study is to explore the possibility of using the upflow sand filter (UF-Filter) as a good alternative to the downflow sand filter (DF-Filter). To achieve the aims of the present study, a comparison was made between the performance of both filters through simultaneous experiments under different operating conditions. These conditions included changing of the filtering velocity from 5 m/h to 10 m/h and the initial water turbidity with a range of (10 – 200) NTU. The sand media with sizes of (0.6 - 1mm) and with 63 cm of depth was used. Experimental results show that the turbidity removal efficiency of the DF-Filter is of about 1.1 times that of the UF-Filter. On the other hand, the UF-Filter has higher turbidity removal efficiency than the DF-Filter by about 1.1 times when the initial turbidity of the influent water is greater than 150 NTU and the filtration velocity is equal to 10 m/hr. These differences in the removal efficiency between both filters can be considered as few values. The average filtration efficiency of the UF-Filter operated with the filtration velocity of 5 and 7.5 m/h is higher than that of the DF-Filter operated with the filtration velocity of 7.5 and 10 m/h, respectively under the same operating conditions. The filtration efficiency of both filters increases when the backwash was carried out before each experimental process instead of replacing the filter media. Also, the head loss of the DF-Filter is significantly increased due to redistribution of the sand media taking place during the backwash cycle, while the head loss of the UF-Filter is not affected. The head loss of the UF-filter at the end of each experimental run is less than that of the DF-Filter by about (18.18 % - 45.31 %) when the filter medium is replaced and this range is increased to about (53.31 % - 62.34 %) when the backwash is performed prior to the start of the experimental work. Thus, the decrease in head loss leads to an increase in the filter running time and decrease the number of backwash process.

show abstract

Evaluating the effects of the flow direction on the performance of the rapid sand filter

Hasan

Al-Baidhani

Al-Saadi

2020

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

Experimental Study on Synthetic Fiber Filled Channel for Treating Turbid Water at the Construction Sites and Protecting Drain System

Yuan¹,

Cheng²,

Park³

et al. 2016

Journal of Korean Society on Water Environment

View full text Add to dashboard Cite

In order to cope with the new and strict government regulations for turbid water discharge from construction sites, this study tested whether synthetic fiber filters can replace conventional best management practices. The filter efficiency was about 10 to 60% with a varying filter depth of 5 to 15cm, presuming extreme storm flow conditions to be in the range of 800 to 1500m/day of filtration rates. Fiber filter acts exactly like a granular filter, i.e. the separation efficiency is directly and inversely proportional to filter depth and rate, respectively. Based on the operational data, we suggested the Log-Log design relationship, which can be used to determine the filter depth and area. Compared to the widely used gravel filter which treats the turbid water at the construction site, about 20% higher efficiency was obtained under similar operating conditions. Cleaning the filter through a simple hand-washing method at the time of break-through, achieved about 90% soil recovery.

show abstract

Evaluation of the Efficiency of a Combination Media Filter in the Removal of Nonpoint Source Pollution

Kang¹,

Kim²,

Jeon³

et al. 2019

J. Korean Soc. Hazard Mitig

View full text Add to dashboard Cite

Stormwater runoff is a major source of nonpoint source pollution, contributing 22-40% of the total pollution load in 4 major rivers, which has a significant impact on aquatic ecosystems. The criteria for installation of nonpoint pollution abatement facilities in Korea focuses on the removal of suspended solids. Since the load of dissolved phosphorus and heavy metals in stormwater runoff is increasing, it is necessary to develop a method to reduce dissolved materials as well. In this study, the efficiency of using clay granule, zeolite, blast furnace, and basic oxygen furnace slag (from lab-and pilot-scale experiments) to remove SS, phosphorus, and heavy metals from surface waters was evaluated. Among the four types of filter media, the removal performance of clay granule for SS and basic oxygen furnace slag for phosphorus and heavy metals was excellent. As a result, the clay granule and basic oxygen furnace slag were selected as the filter media. In the pilot column test, 89.5% of SS, 77.6% of phosphorus, 87.3% of Zn, and 67.5% of Cu was removed, indicating stable removal efficiency, with a head loss of 3.8 cm. It satisfied the nonpoint pollution abatement facility installation criteria of functioning at a linear velocity 20 m/h. The clay granule and basic oxygen slag filter would be a useful addition to a nonpoint pollution abatement facility.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

hi@scite.ai

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Treatment Study of the Turbid Water by High-Speed Synthetic Fiber Filter System

Cited by 3 publications

References 10 publications

Evaluating the effects of the flow direction on the performance of the rapid sand filter

Evaluating the effects of the flow direction on the performance of the rapid sand filter

Experimental Study on Synthetic Fiber Filled Channel for Treating Turbid Water at the Construction Sites and Protecting Drain System

Evaluation of the Efficiency of a Combination Media Filter in the Removal of Nonpoint Source Pollution

Contact Info

Product

Resources

About