Applicability of low pressure membranes for wastewater treatment with cost study analyses

Maddah, Hisham A.; Chogle, Aman M.

doi:10.12989/mwt.2015.6.6.477

Cited by 19 publications

(17 citation statements)

References 12 publications

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“…Maddah et al showed in their membrane cost study analyses that integrated UF-RO membranes have the lowest treatment cost of $0.3/m 3 compared to MF-RO and MBR types (Guyot et al 2007) Appl Water Sci (2017) 7:2637-2651 2645 (*$0.5/m 3 ) since UF membranes can control foulants before they reach at the RO module and damage it. Therefore, fouling costs were eliminated in UF-RO reducing the overall treatment cost for the UF-RO modules (Maddah and Chogle 2015).…”

Section: Consequences Of Biofoulingmentioning

confidence: 99%

Biofouling in reverse osmosis: phenomena, monitoring, controlling and remediation

2016

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This paper is a comprehensive review of biofouling in reverse osmosis modules where we have discussed the mechanism of biofouling. Water crisis is an issue of pandemic concern because of the steady rise in demand of drinking water. Overcoming biofouling is vital since we need to optimize expenses and quality of potable water production. Various kinds of microorganisms responsible for biofouling have been identified to develop better understanding of their attacking behavior enabling us to encounter the problem. Both primitive and advanced detection techniques have been studied for the monitoring of biofilm development on reverse osmosis membranes. Biofouling has a negative impact on membrane life as well as permeate flux and quality. Thus, a mathematical model has been presented for the calculation of normalized permeate flux for evaluating the extent of biofouling. It is concluded that biofouling can be controlled by the application of several physical and chemical remediation techniques.

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Section: Consequences Of Biofoulingmentioning

confidence: 99%

Biofouling in reverse osmosis: phenomena, monitoring, controlling and remediation

2016

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“…Generally, in reverse osmosis, the condition ‫∆‬ > ∆ߨ must be satisfied all the time to allow water to pass through the membrane and reach the permeate side [1,2]. Reverse osmosis membranes are preferred over ultrafiltration and nanofiltration since they are capable of removing 90 to 99% of TDS in water [3]. The osmotic pressure ∆π is defined as the pressure difference ‫‬ − ‫‬ ℓ across the membrane.…”

Section: Reverse Osmosismentioning

confidence: 99%

Predicting Flux Rates against Pressure via Solution-Diffusion in Reverse Osmosis Membranes

Maddah

2021

Eng. Technol. Appl. Sci. Res.

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This paper suggests a new method of predicting flux values at Reverse Osmosis (RO) desalination plants. The solution-diffusion model is utilized to determine the osmotic pressure drops for seawater sources. The same technique was applied to the groundwater source at the Abqaiq plant (500 RO plant) to calculate the osmotic pressure. The calculated osmotic pressures were utilized to determine the appropriate flux rates and membrane resistances of different BWRO Toray membranes and a performance comparison between various membranes has been established. The model results confirm an inverse relationship between membrane thickness and water flux rate. Also, a proportional linear relation between the overall water flux and the applied pressure is identified. Higher flux rates and lower salinity indicate lower membrane resistance yielding higher production. The modeled data predict that BWRO Toray TM720D-440 with an 8" membrane is the optimal choice for treating waters from the three water sources at the Abqaiq plant.

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“…The world's demand for drinking water has been increasing rapidly since the industrial revolution due to the continuous production of wastewater, which contaminates available freshwater sources [3][4][5]. Typically, membrane processes are utilized for the treatment of industrial wastewaters in micro and ultrafiltration processes, and for desalination of seawater by reverse osmosis to meet the increasing demand for freshwater [3,[6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Designing of a Novel Lab-scale Passive Solar Still

Maddah

2019

J. Eng. Technol. Sci.

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The solar still is an emerging water distillation technology gaining popularity among the scientific community. Achieving a high throughput and/or performance in solar stills remains an unresolved challenge. In this study, the feasibility of utilizing solar distillation systems for large water production was investigated. A solar still was designed and tested with different brackish waters under solar insolation in Los Angeles from March to April. The inner surface area of the cell was about 12.7 cm × 12.7 cm with a maximum volume of 322.6 cm 3 . The still performance was evaluated experimentally and modeled theoretically, showing a good agreement between theory and experiment. The maximum achieved efficiency was 20.54%, corresponding to a freshwater production of 384.4 mL/day·m 2 (6.2 mL/day). Lowering the feed amounts from 120 to 30 mL/day resulted in increasing the experimental performance from 6% to 18.3% due to the quick ramp in heat of vaporization; however, the production rates decreased from 446.4 to 341 mL/day·m 2 (7.2 to 5.5 mL/day). Polystyrene insulation and blackened walls/basin can improve the performance by maintaining high temperature, decreasing heat loss, and enhancing solar absorption. It is concluded that still materials, insolation rate, and inclination angle are the most critical design factors.

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Applicability of low pressure membranes for wastewater treatment with cost study analyses

Cited by 19 publications

References 12 publications

Biofouling in reverse osmosis: phenomena, monitoring, controlling and remediation

Biofouling in reverse osmosis: phenomena, monitoring, controlling and remediation

Predicting Flux Rates against Pressure via Solution-Diffusion in Reverse Osmosis Membranes

Modeling and Designing of a Novel Lab-scale Passive Solar Still

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