Water treatment sludge for phosphate removal from the effluent of UASB reactor treating municipal wastewater

Nair, Abhilash T.; Ahammed, M. Mansoor

doi:10.1016/j.psep.2015.01.004

Cited by 19 publications

(10 citation statements)

References 35 publications

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“…Phosphate adsorption on nano‐alumina was monitored at different contact time in the solution with initial phosphate concentration of 30 mg/L by varying temperatures 30–50°C. The kinetics of removal of phosphate is explicitly explained in the literature using pseudo first‐order and second‐order .…”

Section: Methodsmentioning

confidence: 99%

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Phosphate removal from aqueous solutions by nano‐alumina for the effective remediation of eutrophication

Yadav

Kumar

Kapur

et al. 2018

Env Prog and Sustain Energy

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Excessive phosphate effluent discharged in the surface water source rush to eutrophication. Consecutively this disturbs the water quality and aquatic ecosystem, due to the depletion of dissolved oxygen. Reduced oxygen level in water bodies affects aquatic life and decreases biodiversity. The present investigation emphasized the phosphate adsorption over nano‐alumina. Surface characteristics of the adsorbents, BET, FTIR, XRD, TEM, and SEM were analyzed to reveal the phosphate adsorption mechanisms. The adsorption isotherms, kinetics, pH effect were observed in batch experiments. The pHpzc value of nano‐alumina adsorbent was found as 8.1. The maximum phosphate adsorption was found to be 98.75% at contact time of 90 min and pH 6. Different models, e.g., Langmuir, Freundlich, Temkin, and Dubinin‐Radushkevich were used for isotherm study. The kinetic data were tested by pseudo‐first order and second order models. An attempt was made to regenerate the spent adsorbent for reuse in the adsorption process. Low cost and high capability of nano‐alumina make it feasible to utilize as cost‐effective phosphate remediation from wastewater. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S77–S85, 2019

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Section: Methodsmentioning

confidence: 99%

“…where k 2 is the adsorption rate constant (g/mg.min) and can be obtained from the plot of t/q t vs. t [29]. The rate kinetics of phosphate adsorption on the nano-alumina was analyzed using pseudo-first-order [30,31] and pseudo-second-order models [13].…”

Section: Second-order Kineticsmentioning

confidence: 99%

Phosphate removal from aqueous solutions by nano‐alumina for the effective remediation of eutrophication

Yadav

Kumar

Kapur

et al. 2018

Env Prog and Sustain Energy

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“…Studied have demonstrated that AlS in liquid form can be used as a coagulant in wastewater for achieving enhanced primary treatment due to its abundant content of Al 3+ [14,31]. It has also been used as a special coagulating and flocculating agent for industrial effluent purification [32]. Hu et al [33] used liquid AlS as a coagulant for pesticide immobilization in wastewater, while Mazari et al [34] introduced liquid AlS into the pre-treatment process as the primary coagulant for the ultrafiltration (UF) membrane process of municipal wastewater treatment.…”

Section: As Coagulant For Wastewater Treatmentmentioning

confidence: 99%

Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways

Zhao

Xie

et al. 2021

Processes

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Alum sludge (AlS) refers to the inevitable by-product generated during the drinking water purification process, where Al-salt is used as a coagulant in the water industry. It has long been treated as “waste”, while landfill is its major final disposal destination. In fact, AlS is an underutilized material with huge potential for beneficial reuse as a raw material in various wastewater treatment processes. In the last two decades, intensive studies have been conducted worldwide to explore the “science” and practical application of AlS. This paper focuses on the recent developments in the use of AlS that show its strong potential for reuse in wastewater treatment processes. In particular, the review covers the key “science” of the nature and mechanisms of AlS, revealing why AlS has the potential to be a value-added material. In addition, the future focus of research towards the widespread application of AlS as a raw material/product in commercial markets is suggested, which expands the scope for AlS research and development.

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“…Previous studies (Babatunde and Zhao, 2009;Li et al, 2013;Nazirul et al,2014) have shown that alum can effectively remove phosphorus from the wastewater. Similarly, Nair and Ahammed (2015) reported that the 87% of phosphorus removal from the wastewater by using alum sludge. In addition, Craig et al (2015) found that the alum sludge enhanced the sand filter and performed the highest phosphorus removal efficiency (80%).…”

Section: Introductionmentioning

confidence: 96%

Evaluation of phosphorus adsorption capacity of various filter materials from aqueous solution

Adhikari

Krishna

Sarukkalige

2016

Adsorption Science & Technology

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Rapid urbanisation has significantly increased the impervious surface along with increase in pollutants such as nutrients (nitrogen, phosphorus), sediments, oil, and hydrocarbon in stormwater. Their removal is important as they adversely affect the aquatic ecosystem and the environment. Thus, this study evaluated the performance of various adsorbent materials (red gum mulch, pine mulch, flyash, oyster shell, sawdust, clay, sand, zeolite, dolomite, alum and lime sludges) for the removal of phosphorus from synthetic stormwater. Among them, alum and lime sludges appeared to be the most effective in removing phosphorus. Further analysis showed that alum and lime sludges remove 99 and 90% phosphorus within 60 minutes from the synthetic stormwater. Therefore, this study demonstrates that the lime and alum sludges could be highly useful as a sustainable and cheap filter media for stormwater treatment systems that are enriched in phosphorus.

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Water treatment sludge for phosphate removal from the effluent of UASB reactor treating municipal wastewater

Cited by 19 publications

References 35 publications

Phosphate removal from aqueous solutions by nano‐alumina for the effective remediation of eutrophication

Phosphate removal from aqueous solutions by nano‐alumina for the effective remediation of eutrophication

Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways

Evaluation of phosphorus adsorption capacity of various filter materials from aqueous solution

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