Modeling the integrated heterogeneous catalytic fixed-bed reactor and rotating biological contactor system for the treatment of poorly biodegradable industrial agrochemical wastewater

Vasiliadou, Ioanna A.; Pariente, M.I.; Martı́nez, Fernando; Melero, Juan A.; Molina, R.

doi:10.1016/j.jece.2016.04.007

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…Among the 10 of the 13 AWWTPs in which OPs were detected in the influents, the 3 that performed the same operating processes as shown in Figure 5 (W1, W10, and W11; Table 2) removed 100% of the OPs from the influents (Table 2). Importantly, this approach is expected to be more effective in terms of OP removal efficiency and treatment stability than that involving CO-biological treatment with an ASP, which is typically suggested for treating wastewater that contains large amounts of refractory organic matter and toxic substances (e.g., AW) [15][16][17][18]54,55]. In the configuration suggested in this study, the ASP with a settler could be replaced with a membrane biological reactor (MBR) to create solid-free effluent [56,57], and this configuration can enhance the AC adsorption column performance and extend the AC regeneration cycle, resulting in reduced economic costs associated with operating the AC adsorption column.…”

Section: Suggestions For Sustainable Organophosphate Pesticide Regula...mentioning

confidence: 99%

“…Regarding OP removal, most studies have focused on individual unit processes, such as biological reactors, chemical oxidation (CO), and activated carbon (AC) adsorption, in laboratory-scale experiments using synthetic wastewater rather than real agrochemical wastewater (AW) [11][12][13][14]. Moreover, even in studies that apply the CO-activated sludge process (ASP), which has been recognized as a suitable process for treating wastewater containing toxic and refractory organic pollutants, such as AW, the removal of individual OPs has not been reported [15][16][17][18]. Therefore, proper treatment techniques must be developed for real AW in full-scale AWWTPs.…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Proposal for Regulating Organophosphate Pesticides in Wastewater Treatment Plants in South Korea

et al. 2022

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Organophosphate pesticides (OPs) are highly toxic; their presence in surface waters is a matter of great concern. To the best of our knowledge, OPs in wastewater from agrochemical manufacturing facilities (AMFs) and influents and effluents from agrochemical wastewater treatment plants (AWWTPs) have not been previously investigated. Therefore, we investigated the presence of 8 OPs (5 of which are regulated under the Water Environment Conservation Act (WECA)) in 15 AMFs and 13 AWWTPs detected through surface water monitoring and proposed measures for effectively regulating these OPs in AWWTPs. Five OPs (chlorpyrifos, diazinon, dichlorvos, EPN, and fenitrothion) were detected in the AMF and AWWTP influents; three (methyldemeton, parathion, and phenthoate) were not. Of the five detected OPs, chlorpyrifos, dichlorvos, and fenitrothion are not currently regulated via effluent limitations for WWTPs under WECA; thus, additional regulations are required. The most effective process configuration for the removal of these OPs was biological treatment through activated sludge processes, followed by activated carbon adsorption. In the system, 100% OP removal from the AWWTP influents was observed. This treatment technology can be implemented in AWWTPs to minimize the presence of OPs in surface waters, thereby protecting human health and aquatic life.

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Section: Suggestions For Sustainable Organophosphate Pesticide Regula...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sustainable Proposal for Regulating Organophosphate Pesticides in Wastewater Treatment Plants in South Korea

et al. 2022

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“…The RBC bioreactor has been used for nitrogen removal with acceptable removal efficiencies. It operates at a high microbial concentration that allows a higher organic loading rate [ 6 ]. As in the membrane bioreactor, it can further be extended by incorporating membrane filtration for sludge separation.…”

Section: Introductionmentioning

confidence: 99%

Response Surface Methodology for Optimization of Rotating Biological Contactor Combined with External Membrane Filtration for Wastewater Treatment

et al. 2022

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A large amount of wastewater is directly discharged into water bodies without treatment, causing surface water contamination. A rotating biological contactor (RBC) is an attached biological wastewater treatment process that offers a low energy footprint. However, its unstable removal efficiency makes it less popular. This study optimized operating parameters in RBC combined with external membrane filtration (RBC-ME), in which the latter acted as a post-treatment step to stabilize the biological performance. Response surface methodology (RSM) was employed to optimize the biological and filtration performance by exploiting three parameters, namely disk rotation, hydraulic retention time (HRT), and sludge retention time (SRT). Results show that the RBC-ME exhibited superior biological treatment capacity and higher effluent quality compared to stand-alone RBC. It attained 87.9 ± 3.2% of chemical oxygen demand, 45.2 ± 0.7% total nitrogen, 97.9 ± 0.1% turbidity, and 98.9 ± 1.1% ammonia removals. The RSM showed a good agreement between the model and the experimental data. The maximum permeability of 144.6 L/m2 h bar could be achieved under the optimum parameters of 36.1 rpm disk rotation, 18 h HRT, and 14.9 d SRT. This work demonstrated the effective use of statistical modeling to enhance RBC-ME system performance to obtain a sustainable and energy-efficient condition.

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“…The RBC bioreactor has been utilized to achieve steady-state nitri cation round the year and to improve removal e ciency and treatment capacity due to the liberty to multiplicate the mixed liquor suspended solids (MLSS). RBC operates at a high microbial concentration that allows a higher organic loading rate (Vasiliadou et al, 2016). Like in the membrane bioreactor, RBC can further be extended by incorporating membrane ltration for sludge separation.…”

Section: Introductionmentioning

confidence: 99%

Response Surface Methodology for Optimization of Rotating Biological Contactor Combined With An External Membrane Filtration

Waqas

Harun

Bilad

et al. 2021

Preprint

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A large amount of wastewater is directly discharged into water bodies without treatment causing surface water contamination. Conventional treatment techniques produce lower effluent quality and are energy extensive. Rotating biological contactor (RBC) is an attractive biological wastewater treatment that offers a low energy footprint. However, its unstable removal efficiency makes it less popular. This study optimizes operating parameters in RBC combined with external membrane filtration (RBC-ME) in which the latter acts as a post-treatment step to stabilize the biological performance. Response Surface Methodology (RSM) was employed to optimize the biological and filtration performance by exploiting three parameters of disk rotational speed, hydraulic retention time (HRT), and sludge retention time (SRT). Results show that RBC-ME exhibits excellent biological treatment capacity and higher effluent quality. It attained 87.9 ± 3.2% of chemical oxygen demand, 45.2 ± 0.7% total nitrogen, 97.9 ± 0.1% turbidity, and 98.9 ± 1.1% ammonium removals. The RSM data demonstrated that the experimental data and model predictions agreed well. Under the most optimum parameters, the permeability of 144.6 L/m2 h bar could be achieved at 36.1 rpm disk rotational speed, 18 h HRT, and 14.9 d SRT. This work demonstrates the effective use of statistical modeling to enhance RBC-ME system performance to obtain a sustainable and energy-efficient treatment process to prevent human health and the environment.

show abstract

Modeling the integrated heterogeneous catalytic fixed-bed reactor and rotating biological contactor system for the treatment of poorly biodegradable industrial agrochemical wastewater

Cited by 7 publications

References 29 publications

Sustainable Proposal for Regulating Organophosphate Pesticides in Wastewater Treatment Plants in South Korea

Sustainable Proposal for Regulating Organophosphate Pesticides in Wastewater Treatment Plants in South Korea

Response Surface Methodology for Optimization of Rotating Biological Contactor Combined with External Membrane Filtration for Wastewater Treatment

Response Surface Methodology for Optimization of Rotating Biological Contactor Combined With An External Membrane Filtration

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