COD and Nutrient Removal Kinetics of Piggery Wastewater in Nigeria

Okoro, B. U.; Nwaiwu, N. E.

doi:10.9734/jsrr/2017/24287

Cited by 2 publications

(8 citation statements)

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“…The computed COD removal rates of the first order PF model As mentioned before, the Stover-Kincannon model was the most suitable in describing the performance of the system whereas the Grau model predicts the efficiency of substrate removal more accurately. The result concurs with the values mentioned by Okoro & Nwaiwu (2017) and Khosravi et al (2013b). Applying this model by Okoro & Nwaiwu (2017) and Khosravi et al (2013b), the kinetic rate constants were found to be (K B ¼ 0.118 g/L•d and U max ¼ 0.200 g/L•d) and (K B ¼ 128.5 g/L•d and U max ¼ 23.81 g/L•d), respectively.…”

Section: Data Prediction and Model Validationsupporting

confidence: 93%

“…The result concurs with the values mentioned by Okoro & Nwaiwu (2017) and Khosravi et al (2013b). Applying this model by Okoro & Nwaiwu (2017) and Khosravi et al (2013b), the kinetic rate constants were found to be (K B ¼ 0.118 g/L•d and U max ¼ 0.200 g/L•d) and (K B ¼ 128.5 g/L•d and U max ¼ 23.81 g/L•d), respectively. These kinetic coefficients were lower than the rates computed in this research (K B ¼ 79.14 g/L•d and U max ¼ 80.65 g/L•d), except K B reported by Khosravi et al (2013b), which may be attributed to the appropriate average temperature of effluent (18 °C) in the case study and high hydraulic retention time (HRT) (33 day).…”

Section: Data Prediction and Model Validationsupporting

confidence: 93%

“…0.5). However, the Stover-Kincannon model provides better fitting (r 2 ¼ 0.9294), which is consistent with the previous studies such as Chin et al (2020), Okoro & Nwaiwu (2017) and Khosravi et al (2013b). The linear regression of the kinetic reaction constants in Stover-Kincannon model as the best fit for COD removal was shown in Figure 2.…”

Section: )supporting

confidence: 91%

“…Chemical oxygen demand (COD) removal in the ponds may be attributed to the several parameters such as temperature and detention time which make the models susceptible to the uncertainty, variability and complexity in integrating processes and sub-processes. Kinetic models have been introduced and used commonly to describe the removal of organic compounds in the stabilization ponds (Okoro & Nwaiwu 2017) and also, they can be used as a route to describe and predict the performance of biological treatment systems (Okoli & Okonkwo 2016). It is essential to understand the kinetics of pollutants in the system as it leads to proper design parameters and pond performance enhancement.…”

Section: Introductionmentioning

confidence: 99%

“…Also, they concluded that reaction constant rates have a very strong relationship with hydraulic retention time. The prediction of removal rates of organic matter from WSPs at different retention times were studied by Okoro & Nwaiwu (2017) using first order, Monod, Grau and the Stover Kincannon models by fitting models to experimental data. Whereas Stover Kincannon model showed a better adaptability (r 2 ), Grau model provides the best prediction of the substrate removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Kinetic models evaluation for chemical organic matter removal prediction in a full-scale primary facultative pond treating municipal wastewater

Alavi

Ansari

2022

Water Science and Technology

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This study focuses on determining the bio-kinetic coefficients of chemical oxygen demand (COD) removal in full-scale primary facultative ponds (PFPs) system on the basis of 3-year continuous operation. The mean removal of chemical oxygen demand (COD), total suspended solid (TSS) and volatile suspended solid (VSS) were 80, 59 and 49%, respectively. The first-order model paired with continuous stirred-tank reactor (CSTR) and plug flow (PF) regimes, PF k–C*, Stover-Kincannon and Grau second-order models were applied to link COD concentrations at the inlet and outlet of the system and to compare the predictive power of models for the estimation of effluent COD concentrations. The Stover-Kincannon model showed the best adaptability (r2 = 0.9294) with the maximum substrate utilization rate (Umax) of 79.14 g/L· d and saturation constant (KB) of 80.65 g/L· d, whereas the Grau second-order model was the best model to predict outlet COD concentrations (r2 = 0.6925). The computed constants, m and n, of the Grau second-order model were 0.6725 and 15.867 d−1, respectively. While the Stover-Kincannon kinetic rates obtained in this study can be used to design the PFP systems in similar operational conditions, the appropriate prediction of pond behavior can be achieved using the Grau model.

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Section: Data Prediction and Model Validationsupporting

confidence: 93%

Section: Data Prediction and Model Validationsupporting

confidence: 93%

Section: )supporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Kinetic models evaluation for chemical organic matter removal prediction in a full-scale primary facultative pond treating municipal wastewater

Alavi

Ansari

2022

Water Science and Technology

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A Comprehensive Insight on Adsorption of Polyaromatic Hydrocarbons, Chemical Oxygen Demand, Pharmaceuticals, and Chemical Dyes in Wastewaters Using Biowaste Carbonaceous Adsorbents

Khurshid

Mustafa

Isa

2022

Adsorption Science & Technology

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Recent trends in adsorption of hazardous organic pollutants including Polyaromatic Hydrocarbons (PAHs), Chemical Oxygen Demand (COD), Pharmaceuticals, and Chemical Dyes in wastewater using carbonaceous materials such as activated carbon (AC) and biochar (BC) have been discussed in this paper. Utilization of biomass waste in the preparation of AC and BC has gained a lot of attention recently. This review outlines the techniques used for preparation, modification, characterization, and application of the above-mentioned materials in batch studies. The approaches towards understanding the adsorption mechanisms have also been discussed. It is observed that in the majority of the studies, high removal efficiencies were reported using biowaste adsorbents. Regarding the full potential of adsorption, varying values were obtained that are strongly influenced by the adsorbent preparation technique and adsorption method. In addition, most of the studies were concentrated on the kinetic, isotherm equilibrium, and thermodynamic aspects of adsorption, suggesting the dominant isotherm and kinetic models as Langmuir or Freundlich and pseudo-second-order models. Due to development in biosorbents, adsorption has been found to be increasingly economical. However, application of these adsorbents at commercial scale has not been adequately investigated and needs to be studied. Most of the studies have been conducted on synthetic solutions that do not completely represent the discharged effluents. This also needs attention in future studies.

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COD and Nutrient Removal Kinetics of Piggery Wastewater in Nigeria

Cited by 2 publications

References 0 publications

Kinetic models evaluation for chemical organic matter removal prediction in a full-scale primary facultative pond treating municipal wastewater

Kinetic models evaluation for chemical organic matter removal prediction in a full-scale primary facultative pond treating municipal wastewater

A Comprehensive Insight on Adsorption of Polyaromatic Hydrocarbons, Chemical Oxygen Demand, Pharmaceuticals, and Chemical Dyes in Wastewaters Using Biowaste Carbonaceous Adsorbents

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