Screening and cost assessment strategies for end-of-Pipe Zero Liquid Discharge systems

Mansour, Fatima; Alnouri, Sabla Y.; Al‐Hindi, Mahmoud; Azizi, Fouad; Linke, Patrick

doi:10.1016/j.jclepro.2018.01.064

Cited by 39 publications

(9 citation statements)

References 26 publications

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“…(iv) Another original clue was the indication that color could be totally removed through coagulation by PAC with strong Al 2 O 3 content and high basicity. This finding would potentially offer a simple and sustainable approach, when compared with a wide array of different technologies reported for the same purpose . Figure .…”

Section: Discussionmentioning

confidence: 79%

“…However, since the temporal changes in the sequence of selected processes cannot be predicted in advance, it becomes impossible to relate pollution profiles to effluent characteristics. Thus, an end‐of‐pipe approach becomes mandatory . The results underline the imminent danger of this approach, if it remains limited with one and/or a few composite samples, as often encountered in similar studies.…”

Section: Discussionmentioning

confidence: 88%

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Color and pumice stone problems in denim processing effluents: removal potential by integrated physical–chemical treatment

Hooshmand

Sözen

Sensoy³

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Despite extensive research on textile wastewaters, very few studies have been devoted to denim processing effluents, basically ignoring the major pumice stone and color problems. This article defined an integrated physical-chemical pre-treatment scheme as a sustainable solution, which would achieve full removal of pumice stone and color, and would provide an optimum adjustment of wastewater characteristics for biological treatment. RESULTS: This survey revealed a strong effluent with 1.0 g L −1 pumice stone (> 2 mm in size); 3.4 g L −1 total suspended solids (TSS) (< 2 mm in size); 1.15 g L −1 chemical oxygen demand (COD) and color 630 platinum-cobalt (Pt-Co) units, as 70 percentile values. Then, two representative samples approximating 70 percentile COD value were taken for laboratory-scale evaluation involving a sequence of preliminary settling and chemical settling experiments. Preliminary settling for 1.0 h reduced the TSS levels to 760-520 mg L −1 and COD to 790-810 mg L −1 for samples 1 and 2, respectively. No appreciable reduction was observed for color. Chemical treatment with polyelectrolyte and poly-aluminum chloride (PAC) exerted significant polishing impact on preliminary settling effluent, achieving almost complete removal of TSS, down to 60 mg L −1 , additional COD reduction to a final level of 335 mg L −1 . Moreover, color could be removed below 7.0 m −1 for all absorbance levels of 436, 525, and 630 nm tested in the experiments. CONCLUSION: The integrated physical-chemical pre-treatment scheme proved to be an effective and reliable approach, yielding an effluent free of TSS and color, with a COD level that can easily be eliminated through biological treatment. CONCLUSIONThe major parameter that differentiates denim processing effluents from the rest of textile wastewaters is the pumice stone content, which displays a complex array of particle size distribution. This significant pollutant, if not effectively eliminated, would J Chem Technol Biotechnol 2020; 95: 142-150

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Section: Discussionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 88%

Color and pumice stone problems in denim processing effluents: removal potential by integrated physical–chemical treatment

Hooshmand

Sözen

Sensoy³

et al. 2019

J of Chemical Tech & Biotech

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“…he modern industries (e.g., seawater desalination, mining, petrochemical, food, and power generation) produce concentrated waste brine byproducts every day [1][2][3][4][5][6] . The volumes of these brines range from hundreds of liters to tens of thousands of cubic meters per day, depending on the type and scale of the industrial sectors.…”

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confidence: 99%

Designing a next generation solar crystallizer for real seawater brine treatment with zero liquid discharge

et al. 2021

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Proper disposal of industrial brine has been a critical environmental challenge. Zero liquid discharge (ZLD) brine treatment holds great promise to the brine disposal, but its application is limited by the intensive energy consumption of its crystallization process. Here we propose a new strategy that employs an advanced solar crystallizer coupled with a salt crystallization inhibitor to eliminate highly concentrated waste brine. The rationally designed solar crystallizer exhibited a high water evaporation rate of 2.42 kg m−2 h−1 under one sun illumination when treating real concentrated seawater reverse osmosis (SWRO) brine (21.6 wt%). The solar crystallizer array showed an even higher water evaporation rate of 48.0 kg m−2 per day in the outdoor field test, suggesting a great potential for practical application. The solar crystallizer design and the salt crystallization inhibition strategy proposed and confirmed in this work provide a low-cost and sustainable solution for industrial brine disposal with ZLD.

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“…Of course, there are no guarantees that a worldwide minimum has been met, but this contributes to a higher level of confidence in the solutions offered. [16] Qian Chen, Faheem Hassan Akhtar and etal studied and reviewed A novel zero-liquid discharge desalination system based on the humidification-dehumidification process: A preliminary study crystallization system of Two direct-spray humidifiers, dehumidifier/condenser, an air heater, and a salt/brine separator comprise the crystallization system. The system operates with one closed-water loop, one closed-air loop, and one open-air loop.…”

Section: Literature Surveymentioning

confidence: 99%

Zero Liquid Discharge: An Overview

2022

IRJMETS

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A well-designed Zero Liquid Discharge (ZLD) system aims to produce a clean stream that may be used elsewhere in the plant's processes while minimising the amount of liquid waste that needs to be treated. Concentrating (evaporating) wastewater before disposing of it as a liquid brine or further crystalizing the brine into a solid is a typical ZLD strategy. While the brine is continuously concentrated to achieve a greater solids concentration, the evaporated water is recovered and recycled. It is intended that the effluents be treated to adhere to the legal restrictions. The Pollution Control Board has established acceptable thresholds for COD and total suspended solids, and the pH must be neutral. The removed waste is categorized as organic and inorganic waste and is treated accordingly. The purified water can be utilized again for tasks like gardening, boiler feed, etc. Other byproducts produced during treatment, like hydrocarbons and lead, are put to use or sold in accordance with market demands. The practice of treating wastewater is known as "Zero Liquid Discharge" since it prevents the industry from wasting any water at all while still enabling compliance with pollution control board standards. Engineers' responsibilities in Zero Liquid Discharge plants include maximizing operating costs, improving steam economy, and enhancing solvent recovery.

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Screening and cost assessment strategies for end-of-Pipe Zero Liquid Discharge systems

Cited by 39 publications

References 26 publications

Color and pumice stone problems in denim processing effluents: removal potential by integrated physical–chemical treatment

Color and pumice stone problems in denim processing effluents: removal potential by integrated physical–chemical treatment

Designing a next generation solar crystallizer for real seawater brine treatment with zero liquid discharge

Zero Liquid Discharge: An Overview

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