Comprehensive reuse of drinking water treatment residuals in coagulation and adsorption processes

Jung, Kyung-Won; Hwang, Min-Jin; Park, Daeseon; Ahn, Kyu‐Hong

doi:10.1016/j.jenvman.2016.06.041

Cited by 45 publications

(15 citation statements)

References 28 publications

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“…This is because the driving force was very fast at higher concentration due to the excess availability of active sites, but later, a constant removal capacity was observed, which means that active sites are limited. Similar outcome was reported earlier [31].…”

Section: Resultssupporting

confidence: 92%

Facile synthesis and application of cellulosic coagulant from banana peels in cadmium‐spiked water

Oyewo

Bopape

2020

IET nanobiotechnol.

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Section: Resultssupporting

confidence: 92%

Facile synthesis and application of cellulosic coagulant from banana peels in cadmium‐spiked water

Oyewo

Bopape

2020

IET nanobiotechnol.

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“…The predicted R 2 value ( R 2 Pred = 0.8499) was also in reasonable agreement with the adjusted R 2 value ( R 2 Adj = 0.9280), which is indicative of an acceptable goodness‐of−fit between the actual and predicted response values. In general, a coefficient of variation (C.V., %) below 10% and an adequate precision (AP) > 4.0 indicate good reliability and reproducibility of a model . The respective C.V. and AP values of 6.72% and 19.977 suggest an adequate signal, thus indicating that the obtained model could be used to navigate the design space.…”

Section: Resultsmentioning

confidence: 99%

Optimized preparation of activated carbon from municipal sewage sludge and application to the adsorption of azo dye from aqueous solutions

Jung

Lee

2018

Env Prog and Sustain Energy

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In this study, the conditions for preparation of active carbon from municipal sewage sludge (MSS) were optimized from application to the efficient removal of the azo dye, Acid Orange 7 (AO7), from aqueous solutions. To maximize the adsorption capacity (response variable) of the MSS‐derived activated carbon (MSS‐AC), a 3 k Box–Behnken design based on response surface methodology was used to simultaneously optimize five important conditions (independent variables), that is, carbonizing temperature (400–600°C), carbonizing time (0.5–2.0 h), impregnation ratio (1.0–3.5 g KOH/g MSS), activating temperature (600–800°C), and activating time (0.5–2.0 h). The optimal conditions were established as carbonizing temperature: 509°C, carbonizing time: 1.25 h, impregnation ratio: 2.3 g KOH/g MSS, activating temperature: 681°C, and activating time: 1.21 h, with an overall desirability function of 0.991. Further, the effects of various key parameters (solution pH, ionic strength, adsorbent dosage, initial concentration, contact time, and temperature) on the adsorption of AO7 on the as‐synthesized MSS‐AC were elucidated through a series of batch experiments. Adsorption kinetics and isotherm studies revealed that the adsorption process is accurately described by the pseudo‐second order and Sips models. The theoretical maximum adsorption capacity of AO7 was found to be ~1410 mg/g at 25°C, which is superior to that of the other adsorbents reported to date. Additionally, the intraparticle diffusion model suggested that the adsorption was controlled by both external surface adsorption and intraparticle diffusion. Thermodynamic studies also suggested that the adsorption of AO7 by MASS‐AC is exothermic and is governed by physisorption. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S267–S276, 2019

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“…On the other hand, drinking water treatment sludge (DWTS) is a waste by-product from the drinking water treatment process, which contains high content of aluminum or iron species due to the use of different types of coagulants [12]. Moreover, DWTS is also composed of the colloidal and suspended impurities such as sand, silt, clay and humic particles, which is related to the quality of raw water [13].…”

Section: Introductionmentioning

confidence: 99%

“…Suman et al (2018) [21] compared the removal pollutants performance of conventional coagulants and acidified water treatment sludge in the treatment of synthetic dairy wastewater, it was found that acidified water treatment sludge performed better on the removal of turbidity, chemical oxygen demand (COD), biochemical oxygen demand (BOD), total suspended solids (TSS) and total dissolved solids (TDS) under the optimum condition. Jung et al (2016) [12] investigated the application of recovered coagulant from drinking water treatment residuals to treat cotton textile wastewater. Zhang et al (2019) [22] demonstrated that ferric groundwater treatment residual recovered by acid dissolution could be used as an effective sorbent for vanadium-containing wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Effect of Adding Drinking Water Treatment Sludge on Excess Activated Sludge Digestion Process

et al. 2020

Sustainability

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Drinking water treatment sludge (DWTS) is a waste by-product from water treatment plants where aluminum and iron salts are the most commonly used coagulants. DWTS was reused to investigate the effects of DWTS on the digestion liquid quality and microorganism activity of excess activated sludge (EAS). DWTS with four suspended solid (SS) concentrations (0%, 2%, 5% and 10%) was added to EAS which was sampled during aerobic and anaerobic digestion processes, then batch tests were carried out which followed the coagulation-flocculation process. It was found that DWTS can improve total dissolved nitrogen (TDN) and dissolved phosphorus (DP) removal efficiencies for anaerobic EAS. The highest removal efficiency of TDN (29.97%) as well as DP (55.38%) was observed when DWTS dosage was SS = 10%. The release of dissolved organic matter (DOM) by DWTS could increase dissolved organic carbon (DOC) concentration and lead to the accumulation of non-biodegradable humic acid-like substance in aerobic and anaerobic digestion liquid. The dehydrogenase activity (DHA) values of anaerobic EAS were higher than aerobic EAS. DWTS could reduce DHA for both EAS. These results indicate that potential risk of release of DOM should be considered when reusing DWTS in future research.

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Comprehensive reuse of drinking water treatment residuals in coagulation and adsorption processes

Cited by 45 publications

References 28 publications

Facile synthesis and application of cellulosic coagulant from banana peels in cadmium‐spiked water

Facile synthesis and application of cellulosic coagulant from banana peels in cadmium‐spiked water

Optimized preparation of activated carbon from municipal sewage sludge and application to the adsorption of azo dye from aqueous solutions

Effect of Adding Drinking Water Treatment Sludge on Excess Activated Sludge Digestion Process

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