Turbidity and suspended solids removal from high-strength wastewater using high surface area adsorbent: Mechanistic pathway and statistical analysis

Amosa, Mutiu K.; Jami, Mohammed Saedi; Al-Khatib, Ma An Fahmi Rashid; Tajari, Tamrin; Jimat, Dzun Noraini; Owolabi, R. U.

doi:10.1080/23311916.2016.1162384

Cited by 29 publications

(12 citation statements)

References 43 publications

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“…The estimated parameters of Langmuir and Temkin models were negative for Fenton pretreated wastewater. Similar findings have been reported in previous works (Amosa et al, 2016c;Amosa et al, 2015;Vergili and Barlas, 2009). This could be attributed to the complexity of wastewater and the competition between the sorbates (Amosa et al, 2016c).…”

Section: Resultssupporting

confidence: 93%

Removal of Organic Matter and Etodolac from Pharmaceutical Industry Wastewater by PAC Adsorption

Vergili¹,

Gencdal²

2017

Water Environment Research

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The removal of organic matter and etodolac (an anti-inflammatory pharmaceutical) from a real process wastewater by using powdered activated carbon (PAC) adsorption before and after Fenton oxidation has been studied. The wastewater sample is collected from the final stage of chemical synthesis of a pharmaceutical (etodolac). Fenton oxidation resulted with decrease in chemical oxygen demand (84% removal) and etodolac concentration was reduced to 0.7 mg L-1. Optimum adsorption equilibrium conditions were found as t = 16 hours, and m = 10 g L-1. The Freundlich model showed the best fit for the adsorption of both wastewater with R2 values of 0.89 and 0.99. Lower pseudo-second-order rate constant (k2) (0.067 < 2.62) obtained from the adsorption of raw wastewater with higher organic matter concentration confirms the chemisorption of the adsorbates onto the PAC. Pore surface mass diffusion with R2 value of 0.92 was found as rate-controlling step for adsorption process with Fenton pre-treated wastewater.

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Section: Resultssupporting

confidence: 93%

Removal of Organic Matter and Etodolac from Pharmaceutical Industry Wastewater by PAC Adsorption

Vergili¹,

Gencdal²

2017

Water Environment Research

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“…This meant the sorption trend was due to the chemisorption [8]. Another study on the reduction of colour, TSS, BOD, COD, and lignin and tannin from biologically treated POME using natural banana peel, methylated banana peel and BPAC also revealed that the adsorption kinetics were governed by the PSO model with R 2 values of more than 0.99 and very low relative average errors [20].…”

Section: Adsorption Kinetics Studymentioning

confidence: 98%

“…Therefore, derivation of AC from agriculture wastes has been emphasized in recent years since the interest in low-cost AC derived from renewable raw materials is growing. A past study reported that the removal efficiency of suspended solids and turbidity was 89.1% and 91.4%, which was respectively achieved by utilizing powdered activated carbon (PAC) obtained from EFB, with the following specific conditions: 3.5 g PAC/100 mL biotreated POME, contact time of 45 minutes and mixing speed of 150 rpm [8]. Another study on column adsorption of dye wastewater was conducted with a bottom layer of granular activated carbon (GAC) and an upper layer of zeolite in a column of 6.35 cm diameter at 2.84 mL/cm 2 .min surface loading rate and 10 cm bed height [9].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of colour, TSS and COD from palm oil mill effluent (POME) using acid-washed coconut shell activated carbon: Kinetic and mechanism studies

2016

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Abstract. The disposal of palm oil mill effluent (POME) without proper treatment before being discharged into natural water sources has become undesirable because of high concentration of suspended solid (SS), oil and grease (O&G), chemical oxygen demand (COD) and biological oxygen demand (BOD). This study investigated the feasibility of removing colour, total suspended solid (TSS) and COD using acid-washed coconut shell based activated carbon (CSAC) through the evaluation of the adsorption uptake as well as the adsorption kinetics and mechanism. The percentage removal of colour, TSS and COD from POME onto CSAC were 61%, 39%, 66%, respectively achieved within 48 hours of contact time. The kinetic models studied were pseudo-first-order (PFO), pseudo-secondorder (PSO), and Elovich models. The intra-particle diffusion (IPD) model was studied to interpret the adsorption diffusion mechanism. The adsorption of colour, TSS and COD onto CSAC were best interpreted by the PSO model, and well fitted by the Elovich model. The IPD and Boyd plots indicated that IPD and film diffusion controlled the adsorption of colour, TSS and COD onto the CSAC.

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“…To demonstrate this, the current investigation has been focused on the mechanistic analysis of the filter cake build-up by suspended solid particles present in BPOME which is a multicomponent high strength feedwater after an upstream adsorption process over MF membranes. It must be noted that the evaluative effectiveness of the upstream adsorption process in reducing the foulants or pollutant strength of the wastewater is not discussed here as we have extensively reported this elsewhere (Amosa, 2015;Amosa, 2016;Amosa et al, 2016b;Amosa et al, 2015;Amosa et al, 2016c;Muyibi et al, 2014). Rather, we investigate the cake compressibility variation with the membrane porosity and transmembrane pressure to better understand the importance of cake compressibility of a feedwater for proper and effective design of membrane processes involving microfiltration membranes.…”

Section: Introductionmentioning

confidence: 99%

Cake Compressibility Analysis of BPOME from a Hybrid Adsorption‐Microfiltration Process

Amosa

Jami²,

Al-Khatib³

et al. 2017

Water Environment Research

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This study investigates the utility of a hybrid adsorption-membrane process for cake compressibility evaluation of biotreated palm oil mill effluent (BPOME). A low-cost empty fruit bunch (EFB) based powdered activated carbon (PAC) was employed for the upstream adsorption process with operation conditions of 60 g/L PAC dose, 68 min mixing time, and 200 rpm mixing speed to reduce the feed-water strength and alleviate probable fouling of the membranes. Two polyethersulfone microfiltration (MF) membranes of 0.1 and 0.2 μm pore sizes were investigated under constant transmembrane pressures (TMP) of 40, 80, and 120 kPa. The compressibility factors (z), which was obtained from the slopes of power plots (function of specific cake resistance (α) and pressure gradient) were evaluated. The z values of 0.32 and 0.52, respectively obtained, for the 0.1 and 0.2 μm MF membranes provided compressible and stable z values as observed from their power plots. Besides, these membranes were found suitable for the measurement of z since the results are in consonance with the established principle of cake compressibility. Moreover, the upstream adsorption mitigated the clogging of the membranes which ultimately led to moderate resistances and cake compressibility. These are indications that with the secondary cake filtration, a sustainable flux can be achieved during BPOME filtration. The membranes exhibited close to 100% restoration after cleaning.

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Turbidity and suspended solids removal from high-strength wastewater using high surface area adsorbent: Mechanistic pathway and statistical analysis

Cited by 29 publications

References 43 publications

Removal of Organic Matter and Etodolac from Pharmaceutical Industry Wastewater by PAC Adsorption

Removal of Organic Matter and Etodolac from Pharmaceutical Industry Wastewater by PAC Adsorption

Adsorption of colour, TSS and COD from palm oil mill effluent (POME) using acid-washed coconut shell activated carbon: Kinetic and mechanism studies

Cake Compressibility Analysis of BPOME from a Hybrid Adsorption‐Microfiltration Process

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