COD Reduction in Semiconductor Wastewater by Natural and Commercialized Coagulants Using Response Surface Methodology

Kadir, Mohd Omar Ab; Rahman, Nik Norulaini Nik Abdul; Ahmad, Anees

doi:10.1007/s11270-008-9751-7

Cited by 28 publications

(11 citation statements)

References 12 publications

(13 reference statements)

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“…Plant-based coagulants (14,15), such as cactus (16), nuts such as chestnuts and acorns (17), starch (18,19), and Moringa oleifera (20)(21)(22)(23)(24) vestigated on other types of wastewater as either a primary coagulant or as a coagulant aid for a chemical coagulant. For leachate treatment, very limited information is available pertaining to applications of natural coagulants (25,26).…”

Section: Introductionmentioning

confidence: 99%

Potential Use of Polyaluminium Chloride and Tobacco Leaf as Coagulant and Coagulant Aid in Post-Treatment of Landfill Leachate

Rusdizal¹,

Aziz²,

Kadir³

2015

AJEHE

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A study was conducted to treat stabilized leachate by applying polyaluminium chloride (PAC) and tobacco leaf extract as a coagulant and coagulant aid. Experimental results indicated that the tobacco leaves were positively charged. The removal rate of the chemical oxygen demand, using 1500 mg/L PAC as a sole coagulant, was approximately 63% and increased to 91% when 1000 mg/L PAC was mixed with 1000 mg/L tobacco leaf. Additionally, 1500 mg/L PAC with 250 -1000 mg/L tobacco leaf and 54% ammoniacal nitrogen was removed, compared with only 46% reduction using 1500 mg/L with only 46% reduction.

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Section: Introductionmentioning

confidence: 99%

Potential Use of Polyaluminium Chloride and Tobacco Leaf as Coagulant and Coagulant Aid in Post-Treatment of Landfill Leachate

Rusdizal¹,

Aziz²,

Kadir³

2015

AJEHE

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“…To find a solution to this problem, design of experiment (DOE) has been employed to study the effect of variables and their responses using a minimum number of experiments. Response surface methodology (RSM) is a collection of statistical and mathematical methods which are useful for developing, improving, and optimizing processes [8,9].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Optimization of New Flocculant Dosage and pH for Flocculation: Removal of Pollutants from Wastewater

Dawood

2013

Water

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Abstract:In this paper, a new ferric chloride-(polyvinylpyrrolidone-grafted-polyacrylamide) hybrid copolymer was successfully synthesized by free radical polymerization in solution using ceric ammonium nitrate as redox initiator. The hybrid copolymer was characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Response surface methodology (RSM), involving central composite design (CCD) matrix with two of the most important operating variables in the flocculation process; hybrid copolymer dosage and pH were utilized for the study and for the optimization of the wastewater treatment process. Response surface analyses showed that the experimental data could be adequately fitted to quadratic polynomial models. Under the optimum conditions, the turbidity and chemical oxygen demand (COD) removal efficiencies were 96.4% and 83.5% according to RSM optimization, whereas the optimum removals based on the genetic algorithm (GA) were 96.56% and 83.54% for the turbidity and COD removal models. Based on these results, wastewater treatment using this novel hybrid copolymer has proved to be an effective alternative in the overseeing of turbidity and COD problems of municipal wastewater.

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“…In general, inorganic contaminants may include suspended solids (in the range of nanometers to micrometers of SiO 2 , Al 2 O 3 or CeO 2 with concentrations ranging from 50 to 500 mg/L whereas organic contaminants may include metal complexing agents, surfactants, stabilizers and rheology control agents [7][8][9]). Further detailed properties of semiconductor wastewater have been mentioned elsewhere [9][10][11][12]. Due to these characteristics, this low biodegradable wastewater can pose a considerable strain on the activated sludge in the biological wastewater treatment system and is not easily treatable with a single treatment approach [7,13].…”

Section: Introductionmentioning

confidence: 99%

“…Though other environmental friendly treatments have been applied to treat semiconductor wastewater [9], to the best of our knowledge, few studies on the application of natural coagulants as a substitute to inorganic chemical coagulants for the same purpose have been tried i.e. sago and potato starch [11]. However, other studies have reported on using natural materials as coagulants including Moringa oleifera [19][20][21][22][23], Nirmali seed and maize [24,25], mesquite bean and Cactus latifaria [26,27], Cassia angustifolia seed [28] and different leguminose species [29,30] to treat drinking water and wastewater generated from palm oil mill effluent (POME), paper mill, dyes and textiles.…”

Section: Introductionmentioning

confidence: 99%

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Semiconductor Wastewater Treatment Using Tapioca Starch as a Natural Coagulant

Kadir¹,

Hossain²,

Teng³

2013

JWARP

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The efficiency of using tapioca starch as a natural coagulant on semiconductor wastewater treatment was investigated. The silica content in the wastewater was pH dependent and it was found that the reduction of COD and turbidity occurred at pH between 12 and 14 with measurements below 100 mg/L and 100 NTU respectively. A three-level factorial design experiment in the Response Surface Methodology (RSM) was applied to determine the influence of retention time and dosage of the tapioca starch. The parameters studied were chemical oxygen demand (COD), turbidity and total suspended solids (TSS). The R 2 for turbidity, COD and TSS were 0.92, 0.92 and 0.77 respectively. Results indicate that the dosage of the tapioca starch has a higher influence on COD and turbidity reduction. Tapioca starch as a natural coagulant has shown that the optimum turbidity reduction was 99% at a settling time of 30 minutes with dosage of 0.1 g/L. The COD reduction was achieved at 87% after 60 min of retention time and 0.1 g/L of dosage while higher coagulant dosages reduced the TSS concentration to 10.9 mg/L at retention time between 50 to 60 minutes.

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COD Reduction in Semiconductor Wastewater by Natural and Commercialized Coagulants Using Response Surface Methodology

Cited by 28 publications

References 12 publications

Potential Use of Polyaluminium Chloride and Tobacco Leaf as Coagulant and Coagulant Aid in Post-Treatment of Landfill Leachate

Potential Use of Polyaluminium Chloride and Tobacco Leaf as Coagulant and Coagulant Aid in Post-Treatment of Landfill Leachate

Modeling and Optimization of New Flocculant Dosage and pH for Flocculation: Removal of Pollutants from Wastewater

Semiconductor Wastewater Treatment Using Tapioca Starch as a Natural Coagulant

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