Central composite rotatable design for startup optimization of anaerobic sequencing batch reactor treating biodiesel production wastewater

Pereira, Erlon Lopes; Borges, Alisson Carraro; Heleno, Fernanda Fernandes; Oliveira, Karine Rabelo de; Silva, Greicelene Jesus da; Mounteer, Ann Honor

doi:10.1016/j.jece.2019.103038

Cited by 12 publications

(5 citation statements)

References 15 publications

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“…F ‐test was employed for determining the model fitting whereas regression and adjusted regression co‐efficient ( R 2 and Adj. R 2 ) were used for the validation of model fitting data 44 …”

Section: Methodsmentioning

confidence: 99%

Photocatalytic degradation of p‐nitrophenol in wastewater by heterogeneous cobalt supported ZnO nanoparticles: Modeling and optimization using response surface methodology

Akhtar¹,

Akram

Aslam

et al. 2022

Env Prog and Sustain Energy

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In this work, we investigated the photocatalytic degradation of p-nitrophenol using a cobalt (Co)-doped ZnO photocatalyst. The Co-doped ZnO photocatalyst was first prepared through a simple wet impregnation method and subsequently characterized using various qualitative and quantitative techniques. Response surface methodology (RSM) was employed for experimental design and optimization of photocatalytic process. The effects including initial concentration of 4-Nitrophenol [4-NP] in , catalyst dosage, pH and irradiation time were investigated, and RSM suggested a seconddegree polynomial model for abatement of p-nitrophenol from aqueous phase. Under optimized conditions (pH = 5; Irradiation time = 180 min; catalyst dosage = 30 mg; [4-NP] in = 30 mg/L), up to 82% degradation was achieved, signifying the efficacy of the prepared photocatalyst. Moreover, the real case study was employed by incorporating Co-doped ZnO nanocomposite for treatment of real paper wastewater and results showed a considerable photocatalytic activity of Co-ZnO nanocomposites on paper wastewater.

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Section: Methodsmentioning

confidence: 99%

Photocatalytic degradation of p‐nitrophenol in wastewater by heterogeneous cobalt supported ZnO nanoparticles: Modeling and optimization using response surface methodology

Akhtar¹,

Akram

Aslam

et al. 2022

Env Prog and Sustain Energy

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“…Biodiesel is increasingly considered an environmentally viable substitute for diesel in the biofuels business due to global energy needs. Residual glycerol from biodiesel plants (RG) is a by-product of the manufacture of this biofuel from a transesterification reaction of oils (vegetables or animals) with alcohol (Pereira et al, 2019). Besides having a high organic load, the generated RG includes many impurities and chemicals, such as methanol, organic and inorganic salts, vegetable dyes, traces of mono-and diglycerides and soap, making it a polluting by-product (Anitha et al, 2016).…”

Section: Mota Et Al (2009)mentioning

confidence: 99%

Study on Brazilian agribusiness wastewaters: composition, physical‑chemical characterization, volumetric production and resource recovery

Morais

Coelho

Silva

et al. 2021

Rev. Bras. Ciênc. Ambient. (Online)

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Brazil is a significant producer of agricultural and agro-industrial waste, which can be used to recover valuable resources, such as struvite, hydroxyapatite, methane gas, hydrogen gas, and carboxylic acids, to mitigate the environmental impacts of the agro-industrial sector, add economic value to organic waste, and promote the sustainability of natural resources. Thus, this work's objective was to compile and analyze data on the composition, physical-chemical characterization, and volumetric production of six agricultural and agro-industrial wastewaters (AWWs) from activities of paramount importance in Brazilian agribusiness and to report studies on resource recovery from those liquid wastes. The literature review was carried out by analyzing scientific works obtained by searching for keywords in different databases. It was concluded that swine wastewaters (SWs), slaughterhouse wastewaters (SHWs), and dairy wastewaters (DWs) are the most promising for struvite recovery. DWs also stand out for the recovery of hydroxyapatite. SWs and brewery wastewaters (BWs) are commonly used for prospecting for algae or bacterial biomass and their derivative products. All AWWs analyzed are considered promising for biogas, methane and hydrogen, while the most soluble AWWs are more valuable for carboxylic acid production.

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“…In one study, RSM using the CCRD was used in the optimization of the parameters for remediation of acid mine drainage with aquaculture farming waste (shrimp‐shell and mussel bypass) and shrimp 29 . In another study, CCRD consisting of three factored factorial design with five levels was applied for start‐up optimization of anaerobic sequencing batch reactor treating biodiesel production wastewater 30 . RSM using CCRD was used in the optimization of production of banana trunk activated carbon 31 .…”

Section: Introductionmentioning

confidence: 99%

“…29 In another study, CCRD consisting of three factored factorial design with five levels was applied for start-up optimization of anaerobic sequencing batch reactor treating biodiesel production wastewater. 30 RSM using CCRD was used in the optimization of production of banana trunk activated carbon. 31 In our study, experiments were designed using CCRD to estimate the contributions of EO and EC under different process conditions and optimize the process parameters, namely, current density (CD) and sodium sulfate (Na 2 SO 4 ) concentration as supporting electrolyte, for maximizing the TM and AM along with true mineralization current efficiency (TMCE), apparent mineralization current efficiency (AMCE) and minimizing the true mineralization energy consumption (TMEC), apparent EC and sludge produced (SP) (moisture-free) by RSM, during combined electro-oxidation and electro-coagulation on SS anode of an anti-diabetic drug metformin hydrochloride (MET-HCl) and anti-epileptic drug lamotrigine (LAM), and validation experiments were conducted to confirm the experimental results at optimized operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Apparent and true mineralization during combined electro‐oxidation and electro‐coagulation on stainless steel anode

Meena

Ghatak

2023

Asia-Pacific J Chem Eng

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Present study is a novel attempt to experimentally verify that electrochemical treatment of organic pollutants on stainless steel (SS) anode is a combination of electro‐oxidation (EO) and electro‐coagulation (EC) with quantitative estimation of individual contributions of the two mechanisms. Target organic pollutants, metformin HCl (MET‐HCl) and lamotrigine (LAM), were electrochemically treated with SS anode for this purpose. Experiments were designed using central composite rotatable design (CCRD) to assess the effect of current density (CD) and supporting electrolyte concentration (SEC) as independent process parameters. Under all conditions, the process was experimentally verified to be a combination of EO and EC. For MET‐HCl, true mineralization (TM) as a result of EO contribution varied between 50.13% and 66.64%. EO contribution and resulting TM for LAM ranged from 37.5% to 61.83%. EC contributed 30.6%–31.84% towards MET‐HCl remediation causing the TOC to be transferred from the liquid to the sludge produced (SP). EC contribution was 23.68%–35.89% for LAM remediation. Thus, apparent mineralization (AM), the sum of EO and EC contributions, ranged from 80.63% to 97.79% for MET‐HCl and 61.18% to 96.82% for LAM.Process parameters were statistically optimized using response surface methodology (RSM) to simultaneously maximize TM and AM with minimal energy consumption and maximal current efficiency. The optimized conditions were 0.83 mA/cm2 CD and 86.66 ppm SEC for MET‐HCl. The corresponding values were 1.31 mA/cm2 CD and 79.51 ppm SEC for LAM.

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Central composite rotatable design for startup optimization of anaerobic sequencing batch reactor treating biodiesel production wastewater

Cited by 12 publications

References 15 publications

Photocatalytic degradation of p‐nitrophenol in wastewater by heterogeneous cobalt supported ZnO nanoparticles: Modeling and optimization using response surface methodology

Photocatalytic degradation of p‐nitrophenol in wastewater by heterogeneous cobalt supported ZnO nanoparticles: Modeling and optimization using response surface methodology

Study on Brazilian agribusiness wastewaters: composition, physical‑chemical characterization, volumetric production and resource recovery

Apparent and true mineralization during combined electro‐oxidation and electro‐coagulation on stainless steel anode

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