Colour removal from biologically treated landfill leachate with tannin-based coagulant

Ibrahim, Azreen; Yaser, Abu Zahrim

doi:10.1016/j.jece.2019.103483

Cited by 40 publications

(16 citation statements)

References 76 publications

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“…In some studies [72] tannins were provided by Water Chem Pte Ltd and showed to be effective for the post-treatment of leachates. Tannins de-colorization effectiveness of biologically treated landfill leachate was evaluated through a coagulation-flocculation assay.…”

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 In other cases, these natural tannins have been replaced by synthetic compounds that threaten human and animal health and damage the environment.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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Section: Coagulants: Environmental Applicationmentioning

confidence: 99%

Technological Application of Tannin-Based Extracts

et al. 2020

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“…Tannin could be utilized as a bio-coagulant due to the presence of carboxyl and hydroxyl groups. Anionic and cationic tannins were used as a coagulant to treat wastewater in an environmentally friendly manner [ 14 , 15 , 16 ]. The studies reported that tannin has the potential to replace the commercial coagulant due to its compatible coagulation efficiency with a commercial coagulant.…”

Section: Introductionmentioning

confidence: 99%

“…As a natural polymer, tannin does not contain any metal ion in its structure. In addition, tannin is a natural biodegradable polymer, and therefore, the generated sludge after coagulation could be utilized as organic fertilizer in oil palm plantation [ 14 , 15 ]. In addition, the irregular shape of tannin provides higher affinity to suspended and colloidal particles, which enhance the flocculation [ 16 ].…”

Section: Introductionmentioning

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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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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“…In comparison to other stabilized leachates, differences were found: Aftab et al The leachates have a dark brown color and a slightly unpleasant odor, mainly due to the presence of organic acids stemming from the high concentration of decomposing organic matter (Tripathy & Kumar, 2019). The leachate had a high color concentration (4110.0 AE 79.4 Pt-Co U), a particular characteristic of stabilized leachates, which can be associated with the presence of high organic substances (Aziz et al, 2007), such as humic and fluvic compounds (Ibrahim and Yaser, 2019;Tripathy & Kumar, 2019). Turbidity value found (50 AE 3.5 NTU) can be associated with the presence of volatile fatty acids (amino acid and other low molecular compounds), which although they are present in low concentrations in the stabilized leachates, are still present (Bhalla et al, 2013).…”

Section: Landfill Leachate Characteristicsmentioning

confidence: 99%

Leachate treatment: comparison of a bio-coagulant (Opuntia ficus mucilage) and conventional coagulants using multi-criteria decision analysis

Martínez-Cruz

Valencia

Araiza-Aguilar

et al. 2021

Heliyon

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The main aim of this research was to compare a bio-coagulant, organic coagulant, and a conventional coagulant applied to the treatment of leachates. Coagulant options were Stage 1 FeCl 3 , Stage 2 Polyamine, and Stage 3 Opuntia ficus mucilage (OFM). Optimal conditions for maximum chemical oxygen demand (COD) removal were determined by experimental data and Response Surface Methodology. The application of Multiple Criteria Decision Analysis using Multi-Criteria Matrix (MCM) was explored by evaluating the Coagulation-Flocculation processes. Maximum COD removal (%) and the best MCM scores (on a scale from 0 to 100) were: Stage 1: 69.2AE0.9 and 48.50, Stage 2: 37.8AE1.1 and 79.0, and Stage 3: 71.1AE1.7, and 81.5. Maximum COD removal using FeCl 3 and OFM was not statistically different (p 0.15 < 0.05). OFM extraction process was evaluated (yield 0.70 AE 1.17%, carbohydrate content 32.6 AE 1.18%). MCM allows the evaluation of additional technical aspects, besides oxygen COD removal, as well as economic aspects, permitting a more comprehensive analysis. Significant COD removals indicate that the use of OFM as a coagulant in the treatment of stabilized leachate was effective. Opuntia ficus cladodes, a residue, were used to treat another residue (leachates).

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Colour removal from biologically treated landfill leachate with tannin-based coagulant

Cited by 40 publications

References 76 publications

Technological Application of Tannin-Based Extracts

Technological Application of Tannin-Based Extracts

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

Leachate treatment: comparison of a bio-coagulant (Opuntia ficus mucilage) and conventional coagulants using multi-criteria decision analysis

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