Optimal energy mix for a reverse osmosis desalination unit considering demand response

Okampo, Ewaoche John; Nwulu, Nnamdi

doi:10.1108/jedt-01-2020-0025

Cited by 9 publications

(12 citation statements)

References 28 publications

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“…Similarly, MSF and VCD consume energy in the range of 19.58–27.25 and 7–12 kWh/m 3 , respectively. In contrast, the energy consumption for RO and ED has been reported to be approximately 0.7–5.5 kWh/m 3 (Okampo & Nwulu, 2020). As expected, thermal‐based processes have higher energy requirements and capital costs because they produce a considerable amount of waste heat compared to membrane‐based plants.…”

Section: Comparison Between Desalination Technologiesmentioning

confidence: 99%

Runoff water loaded with road de‐icing salts: Occurrence, environmental impact and treatment processes

Gardeshi

Arab

Benguit

et al. 2023

Water & Environment J

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To ensure road safety during winter, it is necessary to use de‐icing salts. However, the detrimental effects of these salts on aquatic ecosystems, vegetation, lakes, ground and surface water, and soils have become a major concern in recent years. This review aims to discuss the adverse environmental impact of using de‐icing salts on the environment and explore current conventional methods used for managing and treating runoff water. Additionally, desalination techniques in terms of their effectiveness and energy requirements have been discussed. By comparing energy costs and considering the salinity levels of runoff water containing de‐icing salts, electrodialysis as a potential technique is introduced to be combined with conventional approaches for removing and recovering salt from runoff water loaded from road de‐icing salt.

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Section: Comparison Between Desalination Technologiesmentioning

confidence: 99%

Runoff water loaded with road de‐icing salts: Occurrence, environmental impact and treatment processes

Gardeshi

Arab

Benguit

et al. 2023

Water & Environment J

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“…RO requires 2-4 kWh/ m 3 of fresh water. [72][73][74] Using the Reverse Osmosis System Analysis (ROSA) model to predict the optimal cost of the system, the results show that the cost of water ranges from US$2.96 to US$6.45/m3, and the cost of electricity using a 30 kW wind turbine is US$0.077 to US$0.155/kWh. In addition, using a 30 kW wind turbine for RO, the results are predicted to reduce CO 2 emissions by 80.03 tons per year.…”

Section: Desalination: Overview and Configurationsmentioning

confidence: 99%

Evaluation of low energy consumption control for seawater desalination on Penghu Island

Fang

2022

Energy & Environment

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In fact, current water supplies due to natural constraints or lack of infrastructure (or both) cannot be provided in a sustainable manner for all increasing and competing uses (e.g. residential, industrial, agricultural). While promoting Penghu's low-carbon islands, in a water-scarce environment, it is the motivation of this research to take into account the development of water resources and lower energy consumption costs. The seawater desalination plant water production technology is improved, the cost of water production is reduced. This research uses a genetic algorithm (GA) to optimize the recovery rate to solve the minimum Specific energy consumption (SEC) value, and then, according to the required water production, the optimal flow rate of raw seawater of the high-pressure pump is obtained, so as to minimize the energy consumption of the reverse osmosis (RO) system. The energy recovery device has a great effect on reducing the energy consumption of the RO system, and it can be seen from the results that the higher efficiency does greatly reduce the energy consumption of the SEC and water production under the different energy recovery device efficiency. Calculated using genetic algorithms, and the SEC is 3.275 and the recovery rate is 45.1%, and the water production energy consumption is 2.35 kWh/m3. Scheme B changed the efficiency of the energy recovery unit to 97.22%, resulting in a SEC of 1.819 and a recovery rate of 25.3%, and a water production energy consumption of 1.31 kWh/m3. Finally, challenges and research gaps are also proposed.

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“…While there have been increased efforts to remediate the worldwide environmental challenge [10], progress in this field has not been rapid enough considering its detrimental effects. At present, a wide range of treatment technologies exist such as reverse osmosis [11] and chemical precipitation, with the process of adsorption being widely used as an efficient and economically sustainable technology for metal removal [12]. Moreover, since environmental regulations require stringent standards, it is vital that technical applicability and financial viability are key factors in adsorbent selection [13].…”

Section: Introductionmentioning

confidence: 99%

The Dynamic Behaviour of a Binary Adsorbent in a Fixed Bed Column for the Removal of Pb2+ Ions from Contaminated Water Bodies

Harripersadth

Musonge

2022

Sustainability

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In the search for a technically efficient and abundant adsorbent in water treatment processes, a bio-composite adsorbent derived from agricultural wastes has been identified as a potential candidate. In this study, eggshells and sugarcane bagasse were combined in varied proportions (1:0, 1:3, 1:1, 3:1 and 0:1) and applied as biosorbents in a lab-scale adsorption column. The effect of bed depth (4–12 cm) of the biosorbents was investigated which enabled the prediction of breakthrough curves for the removal of Pb (II) ions. The life span of the column was extended by increasing the bed depth of the column. The binary adsorbent of 1:3 weight ratio of <75 µm particle size showcased the highest removal efficiency of 91% at a bed depth of 12 cm. The mass transfer zone (MTZ) increased with increasing bed depth with a minor portion of the bed left unused, signifying that the process was highly efficient. The Thomas model constant, KTh, decreased with increasing bed depth with the maximum amount of Pb adsorbed being 28.27 mg/g. With the Yoon–Nelson model, KYN decreased with an increase in τ as the bed height increased. In this study, a novel approach was adopted where the proposed methodology enabled the use of a bio-composite adsorbent in heavy metal removal. The findings of this research will aid in the design and optimisation of the pilot-scale operation of environmentally friendly treatment options for metal laden effluent.

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Optimal energy mix for a reverse osmosis desalination unit considering demand response

Cited by 9 publications

References 28 publications

Runoff water loaded with road de‐icing salts: Occurrence, environmental impact and treatment processes

Runoff water loaded with road de‐icing salts: Occurrence, environmental impact and treatment processes

Evaluation of low energy consumption control for seawater desalination on Penghu Island

The Dynamic Behaviour of a Binary Adsorbent in a Fixed Bed Column for the Removal of Pb2+ Ions from Contaminated Water Bodies

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