Effective coagulation-flocculation treatment of highly polluted palm oil mill biogas plant wastewater using dual coagulants: Decolourisation, kinetics and phytotoxicity studies

Zahrim, A. Y.; Dexter, Z D; Joseph, Collin G.; Hilal, Nidal

doi:10.1016/j.jwpe.2017.02.005

Cited by 72 publications

(41 citation statements)

References 74 publications

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“…It was found that BOD, COD, turbidity, and SS removal enhanced with sedimentation time and reached the stationary phase over 60 min sedimentation time. Zahrim et al [ 26 ] reported that the coagulation is a necessary process, which aggregates colloidal and suspended organic particles to larger flocs with the surface neutralization of coagulant particles. However, the degree of agglomeration depends on the sedimentation time.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the coagulation isotherm modeling equations are effective in explaining coagulation behavior. Among these isothermal models, the Freundlich and Langmuir isothermal models are the most utilized isotherm model models to determine the nature of the coagulation process [ 13 , 24 , 26 ]. In the present study, Langmuir and Freundlich isotherm models were utilized to express the coagulation behavior of tannins on BOD, COD turbidity, and SS removal from PORE, as shown in Figure 6 .…”

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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“…However, the application of these mineral substances is quite limited nowadays and has been reduced due to numerous disadvantages. As reported by many studies, its usage would cause two important environmental consequences (i) an increase in metal concentration in the treated water (which may have human health implications); (ii) production of large (toxic) sludge that is difficult to dehydrate (Ward et al, 2006;Alaoui Slimani et al, 2016;Zahrima et al, 2017). In order to minimize the drawbacks of inorganic coagulants, many factors have been taken into consideration to find the alternative and reduce the dosage of the harmful inorganic coagulants.…”

Section: Inorganic Polymeric Coagulantsmentioning

confidence: 99%

Chemical Coagulation/Flocculation Processes for Removal of Phenolic Compounds from Olive Mill Wastewater: A Comprehensive Review

Achak¹,

Elayadi²,

Boumya³

2019

American Journal of Applied Sciences

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Olive oil extraction processes generate three phases: Olive oil, solid residue (pomace) and aqueous liquor Olive Mill Wastewater (OMW). OMW causes serious environmental deteriorations such as coloring of natural waters, alteration of soil quality, phytotoxicity and odor nuisance. The direct discharge of this effluent into the soil bring various negative effects on the environment, due to its high load of organic matter and phenolic compounds. Coagulation, flocculation and their combination processes are among the most applied processes for wastewater treatment. The application of coagulation technique using mineral and inorganic polymeric coagulants and acid cracking is not always effective to reduce COD and phenolic compounds from OMW except lime. Although direct flocculation is a low treatment cost, use less chemical and produce less sludge, the efficiency of COD and phenolic compounds removal remain very low. Coagulationflocculation process is developed in order to enhance the removal efficiency of organic matter from OMW by optimizing the operating conditions. However, many studies showed that the combination of various cationic organic coagulant and flocculant agents did not show any significant decrease of COD and phenolic compounds except for lime combination. In the present review, recent research studies dealing with the application of coagulation/flocculation for removal of phenolic compounds and COD from OMW are presented and compared. Furthermore, the main factors that influence the selection between coagulation, direct flocculation and coagulation-flocculation are presented and the principal removal mechanisms are discussed.

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“…Another study found that increasing chain length from a polymer with a higher molecular weight provides a good flocculation process. This is because of the numerous binding sites which providing the ability to attach onto the surface [23]. Bridging flocculants are required to adsorb strongly onto the particles and have the abilities to provide a gap between the particles [24].…”

Section: Fig 3 -Response Surface Plot A) Colour and B) Cod Reductionmentioning

confidence: 99%

Combination of Iron Chloride and Polyacrylamide as Coagulant-Flocculants to Remove Pollutants in Dye Wastewater

Ishak¹,

Murshed²,

Ismail³

et al. 2019

IJIE

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Effective coagulation-flocculation treatment of highly polluted palm oil mill biogas plant wastewater using dual coagulants: Decolourisation, kinetics and phytotoxicity studies

Abstract: Effective coagulation-flocculation treatment of highly polluted palm oil mill biogas plant wastewater using dual coagulants: Decolourisation, kinetics and phytotoxicity studies.

Cited by 72 publications

References 74 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

Chemical Coagulation/Flocculation Processes for Removal of Phenolic Compounds from Olive Mill Wastewater: A Comprehensive Review

Combination of Iron Chloride and Polyacrylamide as Coagulant-Flocculants to Remove Pollutants in Dye Wastewater

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