Research Progress on Zero Discharge and Resource Utilization of Industrial High‐Salt Wastewater

Liú, Dan; Liu, Qiongqiong

doi:10.1002/clen.202000410

Cited by 18 publications

(6 citation statements)

References 49 publications

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“…Thus, SO2 Industrial waters usually contain a large amount of difficult-to-treat wastewater high in salt with compact components which cause great damage to the environment [66]. The chloride ion (Cl -) in the industrial wastewaters, though essential for biological function of aquatic organisms, can, in large concentrations, disrupt ion balance in those organisms and can alter the physical structure of soil when exposed to sodium ions (Na + ) [67].…”

Section: Hydrogen Peroxide (Used Only In Dechroming Methods 1 and 3)mentioning

confidence: 99%

Development of an Eco-friendly and Sustainable Method of Dechroming Leather Wastes

Mwondu

Ombui

Kironchi

et al. 2021

TLR

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Huge quantities of chromium-containing leather solid wastes are generated during the production of chrome-tanned leather worldwide. Disposal of these huge quantities of leather solid wastes is a major challenge due to the presence of chromium, which is highly toxic (mainly in its hexavalent form) and detrimental to the environment. Sustainable and environmentally friendly methods of their disposal and treatment options for removing chromium are required so that the dechromed waste can be utilized to make useful products, such as fertilizer for soil conditioning, to improve agriculture, or other applications. In this study, therefore, a new method of dechroming leather solid wastes was designed, whose procedure and results were compared with three other commonly used methods. The focus of the various dechroming methods was on the evaluation of the degree of chromium extraction from chrome-tanned leather wastes without destroying the collagen tissues. The average total amount of extractable chromium content (Cr2O3) in the dried leather waste samples was found to be 3.67%. The new method was found to be relatively more efficient, environmentally sound and less cumbersome than all the other methods investigated in this work. At P-Value of < 0.05, concentrations of chromium extracted and %TKN in residual collagen hydrolysate reached up to 99.89% and 52.89%, respectively. The levels of total ash and total organic carbon were also relatively high in the resultant collagen hydrolysate (i.e. 12.42% and 23.27%, respectively). The t distribution test on the results of the various dechroming methods confirmed that there was a significant difference at 95% confidence interval, since t (calculated) was greater than t (tabulated). It was concluded that nearly all the chromium in chrome-tanned leather wastes can be removed with a simple technology, which is sustainable and environmentally sound.

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Section: Hydrogen Peroxide (Used Only In Dechroming Methods 1 and 3)mentioning

confidence: 99%

Development of an Eco-friendly and Sustainable Method of Dechroming Leather Wastes

Mwondu

Ombui

Kironchi

et al. 2021

TLR

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“…Coal power plants generate a large amount of high-salinity wastewater, and direct discharge of this wastewater can pollute water quality, harm aquatic organisms, and disrupt the safety of local drinking water [ 1 , 2 , 3 ]. In the past, the traditional method of centralized collection and treatment of wastewater has been proven to further increase the complexity, volatility, and toxicity of wastewater components, and cause secondary pollution problems [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Joint Modeling and Operational Optimization of a Reverse Osmosis–Mechanical Vapor Recompression System for Coal-Fired Power Plant Wastewater

Xie,

Zhao,

Jiang

et al. 2024

Membranes

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The operation of coal-fired power plants generates a large amount of wastewater. With the issuance of increasingly strict drainage standards, the cost of wastewater treatment is increasing, and the need to reduce the cost of wastewater treatment is becoming increasingly urgent. Thus, based on the principles of reverse osmosis (RO) and mechanical vapor recompression (MVR) in wastewater treatment, the operational optimization of an RO-MVR joint system was studied in this work with the consideration of reducing the operating costs of wastewater treatment under given operational conditions. Firstly, based on the basic principles of RO and MVR, corresponding mechanism models were established and their accuracy was verified. Then, an economic model of the RO-MVR joint system was established, with the goal of minimizing the water production unit price and daily operating costs of the joint system for optimization analysis. Finally, we analyzed the cost and water production performance of the RO-MVR joint system before and after optimization under different operating conditions. The results show that this optimization based on the RO-MVR joint system will reduce the unit price of water production to 3.16 CNY/m3, with the daily operating costs being decreased by 22% compared to before optimization. This result helps to reduce the cost of zero-discharge wastewater treatment in coal-fired power plants.

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“…The existing water treatment methods can be roughly divided into physical, chemical, and biological methods. The physical methods [8] mainly include multi-effect flash evaporation technology, multi-stage flash evaporation technology, and mechanical vapor recompression evaporation, which are energy-intensive and cost-intensive. The chemical methods [9] mainly include incineration, ion exchange, and electrodialysis, which offer high salt-removal efficiencies, but are expensive and often produce harmful by-products.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review on Forward Osmosis Water Treatment: Recent Advances and Prospects of Membranes and Draw Solutes

Zhu

Chen

et al. 2022

IJERPH

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Forward osmosis (FO) is an evolving membrane separation technology for water treatment and reclamation. However, FO water treatment technology is limited by factors such as concentration polarization, membrane fouling, and reverse solute flux. Therefore, it is of a great importance to prepare an efficient high-density porous membrane and to select an appropriate draw solute to reduce concentration polarization, membrane fouling, and reverse solute flux. This review aims to present a thorough evaluation of the advancement of different draw solutes and membranes with their effects on FO performance. NaCl is still widely used in a large number of studies, and several general draw solutes, such as organic-based and inorganic-based, are selected based on their osmotic pressure and water solubility. The selection criteria for reusable solutes, such as heat-recovered gaseous draw, magnetic field-recovered MNPs, and electrically or thermally-responsive hydrogel are primarily based on their industrial efficiency and energy requirements. CA membranes are resistant to chlorine degradation and are hydrophilic, while TFC/TFN exhibit a high inhibition of bio-adhesion and hydrolysis. AQPs are emerging membranes, due to proteins with complete retention capacity. Moreover, the development of the hybrid system combining FO with other energy or water treatment technologies is crucial to the sustainability of FO.

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Research Progress on Zero Discharge and Resource Utilization of Industrial High‐Salt Wastewater

Cited by 18 publications

References 49 publications

Development of an Eco-friendly and Sustainable Method of Dechroming Leather Wastes

Development of an Eco-friendly and Sustainable Method of Dechroming Leather Wastes

Joint Modeling and Operational Optimization of a Reverse Osmosis–Mechanical Vapor Recompression System for Coal-Fired Power Plant Wastewater

A Comprehensive Review on Forward Osmosis Water Treatment: Recent Advances and Prospects of Membranes and Draw Solutes

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