Biological removal of diazinon in a moving bed biofilm reactor – process optimization with central composite design

Azizi, Ali; Dargahi, Abdollah; Almasi, Ali

doi:10.1080/15569543.2019.1675708

Cited by 58 publications

(22 citation statements)

References 28 publications

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“…Subsequently, the removal efficiency recovered and produced values between 85 and 95%. Similar to our results, an increase in hydraulic retention time from 12 to 36 h in a moving-bed biofilm reactor resulted in an increase in diazinon removal efficiency from 76 to 98%, probably due to the longer period of contact between the pollutants and microorganisms (Azizi et al 2019). Similarly, as observed in CP, a flow rate of 50 mL h −1 caused system destabilization and decreased the efficiency of DZ removal to 67 and 71%.…”

Section: Removal Of a Pesticide Mixture Using A Continuous Stirred Tasupporting

confidence: 89%

Performance of a continuous stirred tank bioreactor employing an immobilized actinobacteria mixed culture for the removal of organophosphorus pesticides

et al. 2020

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In this study, we evaluated polyurethane foam (PF), volcanic rock (VR), and a modified plastic cap (MPC) as supports for the immobilization of organophosphorus (OP) pesticide-degrading actinobacterial strains. The colonization and activity of four streptomycetes were favoured by PF, which was selected as the carrier to use in a continuous stirred tank bioreactor (CSTR) that can be operated at increasing inflows of a pesticide mixture that contains the insecticides chlorpyrifos (CP) and diazinon (DZ). Our results demonstrate that the CSTR can be operated at flow rates of 10 and 40 mL h −1 with greater than 85% removal of the pesticides in the short term. A significant decrease in the efficiency of CP removal was observed at the highest inflows into the reactor. The CP and DZ loading rates in the bioreactor ranged from 0.44 to 1.68 mg L −1 h −1 and from 0.50 to 2.17 mg L −1 h −1 , respectively. Although the treated wastewater exhibited moderate toxicity for Raphanus sativus, a bioreactor inoculated with a mixed culture formed by Streptomyces spp. strains AC5, AC9, GA11 and ISP13 may provide an effective biotechnological strategy for the reduction of OP pesticide residues produced during agronomic and manufacturing practices and therefore prevent environmental pesticidal pollution.

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Section: Removal Of a Pesticide Mixture Using A Continuous Stirred Tasupporting

confidence: 89%

Performance of a continuous stirred tank bioreactor employing an immobilized actinobacteria mixed culture for the removal of organophosphorus pesticides

et al. 2020

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“…Aer 25 days of biological activity, a suitable biolm layer was formed on the media. [19][20][21] It should be noted that the hydraulic retention time (HRT) under continuous conditions was considered 24 h. Aer the growth of biolm and compatibility of microorganisms with 2,4-D herbicide, different concentrations (1.0, 5.0, 10.0, 20.0, 30.0, 35.0, 40.0, 50.0 and 60.0 volume percentage of synthetic wastewater) solution containing 2,4-D herbicide releasing from the 3DE process was added to synthetic wastewater for adaption of microorganisms to the 2,4-D herbicide. The biological process was set up with a lling ratio of 70% and a retention time of 24 h, and at different retention times (8, 12 and 24 h), the reactor efficiency was measured for this lling ratio (70%).…”

Section: Set-up Of Mbbr System and Wastewater Characteristicsmentioning

confidence: 99%

“…To discharge the effluent from the biological reactor, the topest outlet valve of the MBBR biological reactor was continuously opened. 19,20…”

Section: Set-up Of Mbbr System and Wastewater Characteristicsmentioning

confidence: 99%

“…In the above relation, S 0 and S are the concentration of inlet and outlet COD in terms of mg L À1 , respectively; HRT is the hydraulic retention time in terms of the day, and k 1 is the rst-order kinetic constant in terms of 1 per day. 19,20…”

Section: Kinetics Of the Processmentioning

confidence: 99%

“…In Grau second-order kinetic, n is the dimensionless slope; m is the intercept in terms of the day, and q H is the hydraulic retention time in terms of days. 19,20 2.7. Analytical methods ICP-OES (Optima-8300) was used to evaluate the lead leakage in the effluent from the 3DE process (pre-treatment) aer degradation of 2,4-D herbicide under optimal test conditions.…”

Section: Kinetics Of the Processmentioning

confidence: 99%

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Moving-bed biofilm reactor combined with three-dimensional electrochemical pretreatment (MBBR–3DE) for 2,4-D herbicide treatment: application for real wastewater, improvement of biodegradability

et al. 2021

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Architecture of chitosan chains withsulfur‐dopedcarbon dots along with decoratingCeO₂nanoparticles for the photocatalytic application

Nejad

Sheibani

2021

J of Applied Polymer Sci

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Diazinon insecticide from the group of phosphorus pesticides is widely used in pest control. This pesticide can seep into water resources from used agricultural areas and pose a threat to the environment. An economical method to eliminate of pesticides is the degradation in the presence of sunlight, which intensifies the need to design and manufacture new generation photocatalysts with suitable bandgaps to accelerate the process of optical degradation. Nanopolymers with active optical properties can be helpful in this regard In the present study, a new generation of nanopolymers was synthesized by cross‐linking of chitosan with nitrogen and sulfur‐doped carbon dots. In the following, the prepared nanopolymer was decorated and reinforced with nanoceria and confirmation of the structure was done by different techniques such as Fourier transform infrared (FT‐IR), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX), thermogravimetric (TGA), and X‐ray diffraction (XRD) After that, the photocatalyst's ability to optically degrade the diazinon organophosphorus toxin was evaluated which yielded promising results.

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Biological removal of diazinon in a moving bed biofilm reactor – process optimization with central composite design

Cited by 58 publications

References 28 publications

Performance of a continuous stirred tank bioreactor employing an immobilized actinobacteria mixed culture for the removal of organophosphorus pesticides

Performance of a continuous stirred tank bioreactor employing an immobilized actinobacteria mixed culture for the removal of organophosphorus pesticides

Moving-bed biofilm reactor combined with three-dimensional electrochemical pretreatment (MBBR–3DE) for 2,4-D herbicide treatment: application for real wastewater, improvement of biodegradability

Architecture of chitosan chains withsulfur‐dopedcarbon dots along with decoratingCeO₂nanoparticles for the photocatalytic application

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Biological removal of diazinon in a moving bed biofilm reactor – process optimization with central composite design

Cited by 58 publications

References 28 publications

Performance of a continuous stirred tank bioreactor employing an immobilized actinobacteria mixed culture for the removal of organophosphorus pesticides

Performance of a continuous stirred tank bioreactor employing an immobilized actinobacteria mixed culture for the removal of organophosphorus pesticides

Moving-bed biofilm reactor combined with three-dimensional electrochemical pretreatment (MBBR–3DE) for 2,4-D herbicide treatment: application for real wastewater, improvement of biodegradability

Architecture of chitosan chains withsulfur‐dopedcarbon dots along with decoratingCeO2nanoparticles for the photocatalytic application

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Architecture of chitosan chains withsulfur‐dopedcarbon dots along with decoratingCeO₂nanoparticles for the photocatalytic application