Life cycle assessment of treatment and handling options for a highly saline brine extracted from a potential CO2 storage site

Salih, Hafiz; Li, Jiaxing; Kaplan, Ruth; Dastgheib, Seyed A.

doi:10.1016/j.watres.2017.06.032

Cited by 16 publications

(8 citation statements)

References 27 publications

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“…The uncertainty associated with our life cycle inventory was estimated by using a statistical sampling method and by parameter variation or scenario analysis . Statistical sampling was conducted by using the Monte Carlo analysis in Microsoft Excel 2016 as explained elsewhere …”

Section: Methodsmentioning

confidence: 99%

Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply–Demand Evaluation and Life Cycle Assessment

Salih

Patterson

et al. 2018

Energy Fuels

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The feasibility of lime-softening sludge utilization for flue gas desulfurization in coal-fired power plants was evaluated through a supply-demand analysis and a life cycle assessment (LCA). To evaluate the demand and supply of lime sludge to replace limestone on a national scale, the annual amount of lime sludge generated by water treatment utilities in the United States was estimated and compared with the annual amount of limestone used by coal-fired power utilities. To evaluate the environmental sustainability of reusing lime sludge in power plants, an LCA study was performed in which the environmental impact and water footprint of the proposed approach were quantified and these results were compared with the conventional approaches for limestone mining, grinding, and transportation to power plants and lime sludge disposal in landfills. Water utilities across the United States are currently generating approximately 3.2 million tons of lime sludge per year at an estimated disposal cost of approximately US$90 million, whereas power utilities are using approximately 6.3 million tons of limestone per year. The potential savings that would result from partial replacement of limestone with lime sludge was estimated to be approximately US$97 million per year. The LCA study showed that the environmental impact of lime sludge utilization in power plants under different scenarios was 2 orders of magnitude lower than that of the landfill disposal option. Furthermore, the water footprint for lime sludge reuse in power plants was almost negligible compared with that of the conventional approaches of disposing of lime sludge at water utilities or using limestone at power utilities.

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Section: Methodsmentioning

confidence: 99%

Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply–Demand Evaluation and Life Cycle Assessment

Salih

Patterson

et al. 2018

Energy Fuels

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“…Safe and cost-effective management of saline brines is a critical enabler of inland brackish water desalination, produced water treatment, geothermal energy production, and CO 2 sequestration. , Current best practices for managing the vast majority of these brines is direct disposal via deep well injection or minimal treatment followed by discharge to the environment. , The financial and environmental consequences of this disposal-centric management strategy are significant, including high capital and operational costs of transporting water, environmental costs associated with brine transport and discharge, and increased seismic risks associated with high-volume brine injection . These risks are driving the design of brine management networks that couple increased direct water reuse with desalination technologies that reduce brine disposal volume and produce high-quality water for beneficial secondary applications. − …”

Section: Introductionmentioning

confidence: 99%

Cost Optimization of Osmotically Assisted Reverse Osmosis

Bartholomew

Siefert

Mauter

2018

Environ. Sci. Technol.

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We develop a nonlinear optimization model to identify minimum cost designs for osmotically assisted reverse osmosis (OARO), a multi-staged membrane-based process for desalinating high salinity brines. The optimization model enables comprehensive evaluation of a complex process configuration and operational decision space that includes nonlinear process performance and implicit relationships between membrane stages, saline sweep cycles, and make-up, purge, and recycle streams. The objective function minimizes cost, rather than energy or capital expenditures, to accurately account for the tradeoffs in capital and operational expenses inherent in multi-staged membrane processes. Generally, we find that cost-optimal OARO processes minimize the number of stages, eliminate the use of saline make-up streams, purge from the first sweep cycle, and successively decrease stage membrane area and sweep flowrates. The optimal OARO configuration for treating feed salinities of 50-125 g/L total dissolved solids to a water recovery of 30-70% results in process costs less than or equal to $6 per m3 of product water. Sensitivity analysis suggests that future research to minimize OARO costs should focus on minimizing the membrane structural parameter while maximizing the membrane burst pressure and reducing the membrane unit cost.

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“…During the process of coal gasification wastewater treatment, the water consumption from electric energy accounts for the main consumption part, and the water consumption of chemicals in treatment is negligible. According to the literature, the water consumption is 0.35 m 3 water/1 kW h of electricity. In China, this value is 40–50% higher …”

Section: Methodsmentioning

confidence: 99%

“…Although the concentration of pollutants can eventually be reduced, advanced wastewater treatment processes consume too much energy and materials. Because the power supply for coal gasification wastewater treatment plants is often distributed by supporting power plants, the indirect water consumption caused by energy and materials cannot be ignored . In addition, this may lead to unknown environmental impacts, such as greenhouse gas (GHG) emissions, acidification, ozone depletion, and smog air. , Complex processes broaden the boundaries of the coal gasification wastewater treatment process .…”

Section: Introductionmentioning

confidence: 99%

Sustainability Analysis for the Wastewater Treatment Technical Route for Coal-to-Synthetic Natural Gas Industry through Zero Liquid Discharge Versus Standard Liquid Discharge

Yang

Hou

Meng

et al. 2020

ACS Sustainable Chem. Eng.

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In recent years, the rapid development of the coal chemical industry has triggered problems related to supply and demand imbalances of the regional water resources in China. Water resources have become the main bottleneck restricting the sustainable development of the coal chemical industry. To achieve cleaner production, China has issued policies on zero liquid discharge for the coal chemical industry, especially for coal gasification wastewater. However, to achieve zero liquid discharge targets, coal gasification companies have to add more processes to support and complete the sustainable reuse of wastewater. To scientifically evaluate this sustainability problem, in this study, we conducted a life cycle assessment of water consumption, costs, and environmental impacts for the zero liquid discharge route of the fixed-bed coal gasification wastewater treatment process. The results reveal that the total water consumption of the zero liquid discharge route is greater than the one of the standard liquid discharge route. Reusing 1 m 3 of water would consume an extra 1.64 m 3 of water. This is because of the large amount of indirect water consumption caused by the extra high power consumption. Moreover, the life cycle cost of the zero liquid discharge route is approximately twice that of the standard liquid discharge route while the total environmental impact is 1.15 times that of the standard liquid discharge route and 1.03 times for total human health impact. The zero liquid discharge route increases water consumption, incurs higher costs, and causes more serious environmental impacts. Therefore, the zero liquid discharge route does not meet the requirements of cleaner production and sustainable development.

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Life cycle assessment of treatment and handling options for a highly saline brine extracted from a potential CO2 storage site

Cited by 16 publications

References 27 publications

Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply–Demand Evaluation and Life Cycle Assessment

Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply–Demand Evaluation and Life Cycle Assessment

Cost Optimization of Osmotically Assisted Reverse Osmosis

Sustainability Analysis for the Wastewater Treatment Technical Route for Coal-to-Synthetic Natural Gas Industry through Zero Liquid Discharge Versus Standard Liquid Discharge

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