Using vegetable tannin and polyaluminium chloride as coagulants for dairy wastewater treatment: A comparative study

Justina, Marciel Dela; Muniz, Beatriz Rodrigues Bagnolin; Bröring, Mariana Mattge; Costa, Valdeci José; Skoronski, Éverton

doi:10.1016/j.jwpe.2018.08.001

Cited by 55 publications

(17 citation statements)

References 32 publications

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“…At higher alkaline regions, more OH − attached with tannin, which turns to the catatonic tannin less positive charge and diminishes the attraction to the anionic organic particles present in the PORE, and therefore, it decreased the removal efficiency of BOD, COD, turbidity, and SS from PORE [ 17 ]. Dela Justina et al [ 21 ] observed that the tannin coagulation efficiency for the removal of color, turbidity, and total solids from dairy wastewater was influenced by pH and reached a maximum pH over 5.0. Graham et al [ 22 ] reported on the decrease of the tannin coagulation efficiency due to the losses of cationic charge and aqueous solubility with pH.…”

Section: Resultsmentioning

confidence: 99%

“…There are no discharge limits for the turbidity in industrial effluents that have been set by DoE, Malaysia. Dela Justina et al [ 21 ] observed that tannin has the comparative coagulation efficiency of polyaluminum chloride for the removal of color, turbidity, and total solids from dairy wastewater. The findings of the present study reveal that tannin has the potential to be an alternative to commercial inorganic coagulant for treating PORE.…”

Section: Resultsmentioning

confidence: 99%

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Treatment of Palm Oil Refinery Effluent Using Tannin as a Polymeric Coagulant: Isotherm, Kinetics, and Thermodynamics Analyses

et al. 2020

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The refining of the crude palm oil (CPO) generates the palm oil refinery effluent (PORE). The presence of high contents of biochemical oxygen demand (BOD), chemical oxygen demand (COD), turbidity, and suspended solids (SS) in PORE encourages the determination of an effective treatment process to minimize the environmental pollution and preserve aquatic life. In the present study, a biodegradable natural polymer, namely tannin, was utilized as a coagulant to treat PORE. The coagulation experiment was conducted using a jar test apparatus. The tannin coagulation efficiency was evaluated based on the BOD, COD, turbidity, and SS removal from PORE by varying the tannin dose (50–300 mg/L), pH (pH 4–10), treatment time (15–90 min), and sedimentation time (15–90 min). It was found that the maximum removal of BOD, COD, turbidity, and SS was 97.62%, 88.89%, 93.01%, and 90.21%, respectively, at pH 6, a tannin dose of 200 mg/L, 60 min of coagulation time, and 60 min of sedimentation time. Analyses of isotherm models revealed that the Freundlich isotherm model was well fitted with the coagulation study. Kinetics studies show that the pseudo-second-order kinetics model was the well-fitted kinetics model for the BOD, COD, turbidity, and SS removal from PORE using tannin as a polymeric coagulant. The determination of thermodynamics parameters analyses revealed that BOD, COD, turbidity, and SS removal from PORE was spontaneous, exothermic, and chemical in nature. The finding of the present study shows that tannin as a natural polymeric coagulant would be utilized in PORE treatment to avoid toxic sludge generation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Treatment of Palm Oil Refinery Effluent Using Tannin as a Polymeric Coagulant: Isotherm, Kinetics, and Thermodynamics Analyses

et al. 2020

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“…In addition, the flocs formed while using tannins presented better stability accompanied by a reduced breakage achieved through the application of slow mixing time. Lastly, the lower ash content, the higher amount of volatile solids, and fixed carbon of the final sludge [69]. Similarly, another research evaluated the capacity of a coagulation-flocculation-sedimentation procedure based on the use of Tanfloc SG against an iron salt for their application in the treatment of dye-house effluents.…”

Section: Coagulants: Environmental Applicationmentioning

confidence: 99%

Technological Application of Tannin-Based Extracts

et al. 2020

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Tannins are polyphenolic compounds naturally found in vegetables. Their presence in nature has prompted their historical use in many different ways. The revision of their traditional utilization has allowed their further modification aiming for an industrial application. Sometimes these modifications have implied the addition of harmful substances such as formaldehyde, classified as a carcinogen of category B1. In other cases, these natural tannins have been replaced by synthetic compounds that threaten human and animal health and damage the environment. Therefore, currently, both academy and industry are searching for the substitution of these unsafe complexes by the increasing inclusion of tannins, natural molecules that can be obtained from several and diverse renewable resources, modified using harmless additives. To achieve promising results, cost-efficient and eco-friendly extraction methods have been designed. Once these green alternatives have been isolated, they have been successfully applied to many fields with very assorted aims of utilization such as coagulants, adhesives, floatation agents, tannings, dyes, additives, or biomolecules. Therefore, this review offers a global vision of the full process that involves the tannin’s technological application including an overview of the most relevant tannin sources, effective extraction methods, and their utilization in very diverse fields.

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“…PAC is a type of coagulant derived from aluminum salts, often used for textile industrial wastewater treatment as a pre-hydrolyzed coagulant. PAC has advantages such as low alkalinity consumption and produces less sludge than non-hydrolyzed coagulants [ 48 , 49 ]. Wastewater was conditioned based on an optimum pH of 4 and an optimum coagulant dose of 500 ppm [ 50 ].…”

Section: Resultsmentioning

confidence: 99%

Polysulfone–Polyvinyl Pyrrolidone Blend Polymer Composite Membranes for Batik Industrial Wastewater Treatment

et al. 2021

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Batik wastewater, in general, is colored and has high concentrations of BOD (biological oxygen demand), COD (chemical oxygen demand), and dissolved and suspended solids. Polysulfone (PSf)-based membranes with the addition of polyvinyl pyrrolidone (PVP) were prepared to treat batik industrial wastewater. PSf/PVP membranes were prepared using the phase inversion method with N-methyl-2 pyrrolidone (NMP) as the solvent. Based on the membrane characterization through FESEM, water contact angle, porosity, and mechanical tests showed a phenomenon where the addition of PVP provided thermodynamic and kinetic effects on membrane formation, thereby affecting porosity, thickness, and hydrophilicity of the membranes. The study aims to observe the effect of adding PVP on polysulfone membrane permeability and antifouling performance on a laboratory scale through the ultrafiltration (UF) process. With the addition of PVP, the operational pressure of the polysulfone membrane was reduced compared to that without PVP. Based on the membrane filtration results, the highest removal efficiencies of COD, TDS (total dissolved solid), and conductivity achieved in the study were 80.4, 84.6, and 83.6%, respectively, on the PSf/PVP 0.35 membrane operated at 4 bar. Moreover, the highest color removal efficiency was 85.73% on the PSf/PVP 0.25 operated at 5 bar. The antifouling performance was identified by calculating the value of total, reversible, and irreversible membrane fouling, wherein in this study, the membrane with the best antifouling performance was PSf/PVP 0.25.

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Using vegetable tannin and polyaluminium chloride as coagulants for dairy wastewater treatment: A comparative study

Cited by 55 publications

References 32 publications

Treatment of Palm Oil Refinery Effluent Using Tannin as a Polymeric Coagulant: Isotherm, Kinetics, and Thermodynamics Analyses

Treatment of Palm Oil Refinery Effluent Using Tannin as a Polymeric Coagulant: Isotherm, Kinetics, and Thermodynamics Analyses

Technological Application of Tannin-Based Extracts

Polysulfone–Polyvinyl Pyrrolidone Blend Polymer Composite Membranes for Batik Industrial Wastewater Treatment

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