Optimization of the Coagulation–Flocculation Process for Slaughterhouse Wastewater Using Response Surface Methodology

Gökçek, Öznur Begüm; Özdemir, Safiye

doi:10.1002/clen.202000033

Cited by 18 publications

(6 citation statements)

References 45 publications

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“…This indicates the effectiveness of the process in improving effluent quality by obtaining around 60% additional removal of COD compared to sedimentation. These results quite agree with what other authors report who indicate that the coagulation using ferrous ion reaches the maximum efficiency at pH between 8 and 11, because in these pH ranges ferrous ions mainly exist in the form of Fe(OH) 2 and show effectiveness in treatment (Ha & Huong 2017;Gökçek & Özdemir 2020).…”

Section: Analysis and Resultssupporting

confidence: 93%

“…There are several reports from researchers about slaughterhouse wastewater treatment, containing less than 4.0 g/L of COD, via coagulation-flocculation using different reagents, reaching high efficiencies of organic matter removal (70-80% COD removal). Nevertheless, the concentrations of other parameters are still high, for example turbidity, color, or suspended solids, which implies requiring other treatment steps (Ha & Huong 2017;Gökçek & Özdemir 2020).…”

Section: Introductionmentioning

confidence: 99%

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Solar homogeneous catalysis to the removal of organic matter from slaughterhouse effluents undergone to a prior biological process

Hurtado

Valdez

Escudero

2021

Water Science and Technology

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This study shows the effectiveness of the wastewater treatment from a municipal slaughterhouse undergone to a previous biological treatment applying a sequence of stages, reaching a 75% of elimination of the COD using sedimentation in combination of coagulation-flocculation, using 0.5 g/L FeCl3 which is one of the best known inorganic coagulants. Then, the elimination of COD was around 98% adding the Fenton process where 1,000 mg/L H2O2 and FeSO4 are used. In addition to the COD, other water quality parameters were measured to evaluate the level of purification of the test samples, such as solids of different types, pH, DOC and so on. With the above, it can be noted that the Fenton process had a slight improvement in the effluent quality by using a solar concentrator in the now called photo-Fenton process, reaching around 99% of COD removal (0.36 g/L), 91% of total suspended solids (0.32 g/L) and 89% of DOC (0.20 g/L). These results were the best achieved within a proposed treatment train for this type of complex wastewater. Moreover, this last part of the process adds an improvement, by the usage of renewable energy sources such as sunlight.

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Section: Analysis and Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Solar homogeneous catalysis to the removal of organic matter from slaughterhouse effluents undergone to a prior biological process

Hurtado

Valdez

Escudero

2021

Water Science and Technology

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“…The optimization is done to obtain the values of process parameters that give maximum removal efficiency. [ 39 ] The CCD‐based optimization technique has been used to derive the maximum removal efficiency of cement dust. The optimization of the quadratic equation gives the maximum value of output removal percentage within the range of the experiments conducted.…”

Section: Resultsmentioning

confidence: 99%

“…The optimization is done to obtain the values of process parameters that give maximum removal efficiency. [39] The CCD-based Therefore, the quadratic model developed by the RSM method accurately predicted the removal efficiency of cement dust.…”

Section: Process Optimizationmentioning

confidence: 99%

Removal of Cement Dust Particulates via Fully Submerged Self‐Primed Venturi Scrubber

Mukherjee

Verma

Biswas

et al. 2021

CLEAN Soil Air Water

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In the last few decades, researchers have aimed to improve the removal efficiency of air pollutants using several engineered devices. Here, cement dust removal is investigated using the water scrubbing technique by applying a self‐priming venturi scrubber in fully submerged conditions to study the effect of various operating parameters on performance. This study carries out optimization to develop a model. The removal efficiency of particulates acts as the functional process parameter and its related interaction terms are discussed in this work. Response surface methodology is applied to optimize the process output response. The developed model and design expert platform, inbuilt with the central composite design technique performs the process optimization. This helps in comparing the input and output variables. The maximum removal efficiency obtained is 99.77% at a throat gas velocity of 60 m s−1, an inlet cement dust loading rate of 3.1 g m−3, and a liquid level of 100 cm in the external cylinder under fully submerged conditions. Moreover, recyclable household greywater is used as a scrubbing liquid owing to its low‐cost and availability in sufficient quantities. The proposed scrubber system efficiently removes particulate matter such as cement dust particulates from the environment.

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“…Before membrane filtration tests, slaughterhouse wastewater was pre-treated by the coagulation-flocculation process using alum coagulant (pH 6.5, alum concentration of 1000 mg L −1 , rapid mixing rate of 150 rpm, and settling time of 10 min). 15 The chemical oxygen demand (COD) value of the wastewater after pretreatment was determined to be 940 mg L −1 . Membrane experiments were carried out by collecting the supernatant part of the wastewater after pre-treatment.…”

Section: Membrane Filtration Experimentsmentioning

confidence: 99%

Investigation of the treatability of pre‐coagulated slaughterhouse wastewater using dead‐end filtration

Özdemir

Uzal

Gökçek

2021

J of Chemical Tech & Biotech

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BACKGROUND: In the present study, the performance of the membrane process, one of the advanced treatment methods that can enable the reuse of slaughterhouse wastewater, was evaluated. The wastewater was treated using ultrafiltration (UF) (10, 50 kDa), nanofiltration (NF) (150-300 DA) and reverse osmosis (RO) (500 kDa) membranes alone, and UF + NF, UF + RO membrane combinations at different pressures. In addition to rejection and permeate flux considerations, it was attempted to select the most effective membrane by performing scanning electron microscopy, Fourier transform infrared, contact angle, and atomic force microscopy analyses of the membranes used.RESULTS: As a result of the experiments, the highest flux was observed at 5 bar for the 50 kDa UF membrane. When the performances of the sequential application of 10 and 50 kDa UF membranes followed by NF and RO membranes were evaluated, the highest flux was obtained for the sequential application of the 50 kDa UF membrane with the NF membrane as 19.68 and 9.05 L m −2 h, respectively. CONCLUSION: The highest chemical oxygen demand (COD) removal was obtained for the RO membrane at 20 bar as 88.67%, and for the 50 kDa UF + RO sequential application, the COD removal was increased from 70% to 88.67%.

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Optimization of the Coagulation–Flocculation Process for Slaughterhouse Wastewater Using Response Surface Methodology

Cited by 18 publications

References 45 publications

Solar homogeneous catalysis to the removal of organic matter from slaughterhouse effluents undergone to a prior biological process

Solar homogeneous catalysis to the removal of organic matter from slaughterhouse effluents undergone to a prior biological process

Removal of Cement Dust Particulates via Fully Submerged Self‐Primed Venturi Scrubber

Investigation of the treatability of pre‐coagulated slaughterhouse wastewater using dead‐end filtration

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