Investigating the performance of a novel cyclic rotating-bed biological reactor compared with a sequencing continuous-inflow reactor for biodegradation of catechol in wastewater

Aghapour, Ali Ahmad; Moussavi, Gholamreza; Yaghmaeian, Kamyar

doi:10.1016/j.biortech.2013.03.133

Cited by 15 publications

(39 citation statements)

References 15 publications

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“…The pseudo steady-state condition was assumed when the removal percentages of OG remained constant (with changes of less than 3%) over five consecutive HRT (Aghapour et al, 2013). All the experiments were carried out in duplicate to ensure the reproducibility of the results and the average values were stated therein.…”

Section: Methodsmentioning

confidence: 99%

Efficient Degradation of a Biorecalcitrant Pollutant from Wastewater Using a Fluidized Catalyst-Bed Reactor

Ahmadi

Ramavandi

Sahebi

2014

Chemical Engineering Communications

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This study investigated the treatment of an azo dye, as a biorecalcitrant model, from industrial wastewater by using Cu/Mg/Al-chitosan in a fluidized catalyst-bed reactor. A number of variables were used to study the impact they had on the oxidation process involving azo dye. The maximum degradation of the azo dye was achieved at 7 g Cu/Mg/Al-chitosan. The chloride and sulfate ions had a synergistic effect on azo dye removal. The oxidation of the azo dye under the selected conditions was of pseudo-first order. Textile wastewater could effectively be treated using a low concentration of about 7 g of Cu/Mg/Al-chitosan in a short hydraulic retention time of 10 min. The use of Cu/Mg/Al-chitosan demonstrated a promising method to eliminate the azo dye from the wastewater.

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Section: Methodsmentioning

confidence: 99%

Efficient Degradation of a Biorecalcitrant Pollutant from Wastewater Using a Fluidized Catalyst-Bed Reactor

Ahmadi

Ramavandi

Sahebi

2014

Chemical Engineering Communications

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“…Phenol and phenolic compounds are resistant, toxic compounds with bactericidal and fungicidal properties (Aghapour et al, 2013a;Aghapour et al, 2013b). Chlorophenols result from combining phenol with chlorine and are usually more resistant and stable than phenol and are one of the serious environmental concerns (Mondal et al, 2011;Arora and Bae, 2014).…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of 2-4-6 trichlorophenol by sequencing batch reactors (SBR) equipped with a rotating biological bed and operated in an anaerobic-aerobic condition

Ghochlavi

Aghapour²

2022

Front. Environ. Sci.

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2-4-6 Trichlorophenol (TCP) is toxic, carcinogenic, and resistant to biodegradation. In this study, a rotating biological bed (RBB) was used to improve the efficiency of Sequencing batch reactors (SBR), and it was operated in sequential anaerobic and aerobic conditions. Biofilm growth on media of rotating biological bed was also confirmed using Scanning Electron Microscope (SEM). In this study, the effect of 2-4-6 trichlorophenol concentration (5–430 mg/L), hydraulic retention time (HRT) (12–30 h), the number of operating cycles per day (6–12 cycles/d), the type of combination of anaerobic and aerobic processes and the presence of a rotating biological bed and its rotation were studied. SBR equipped with a rotating biological bed (SBR-RBB) with the sequential anaerobic-aerobic operation in optimal operating conditions (TCP: 430 mg/L, cycles/d: 8, and HRT: 6 h) can remove nearly 100% of TCP and more than 95% of TP and COD. The role of the presence of an RBB in removing TCP, TP, and COD was 7, 20, and 23%, respectively. The role of rotation of RBB also was 23%, 10, 21, and 62%, respectively. So, SBR-RBB, with the sequential anaerobic-aerobic operation, was able to remove higher concentrations of TCP (430 mg/L) in a shorter HRT (6 h) with higher efficiency (nearly 100%) compared to previous studies. Therefore, for the first time in this study, the biological treatment of 430 mg/L of TCP is reported by a biological process.

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“…The control reactor in that removal percentage collapsed, because it could not be tolerated. Therefore, the metabolic of microbial degradation was precluded (11). The MBBR reactor was kept operating in HRT of 24 hours at the inlet SDBS concentration of 400 mg/L, until the mean percentage of the pseudo-steady state removal reached to 81%.…”

Section: Resultsmentioning

confidence: 99%

“…The microbial growth nutrient was prepared by mixing the nutrient solution and the synthetic wastewater, keeping the COD/N/P ratio close to 100:5:1 (9). The nutrient ingredients were K 2 HPO 4 , KH 2 PO 4 , NH 4 Cl, CaCO 3 , NaHCO 3, respectively 5, 15, 120, 10, and 10 grams, for each liter of tap water (11). Before using the synthetic wastewater for microorganism, its pH was adjusted close to neutral.…”

Section: Methodsmentioning

confidence: 99%

Removal of Sodium Dodecylbenzene Sulfonate by Moving Bed Biofilm Reactor, Using Synthetic Media

2014

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Background: Detergents and difficulties of their presence in the water and wastewater cause various problems such as foam production, anomalies in the growth of algae, and accumulation and dispersion in aqueous environments. Objectives: The aim of this study was to examine and compare the moving bed biofilm reactor with another reactor without media (carries) for anionic surfactants removal. Materials and Methods: In this study, the media was from the 2H Company with specific surface of 535 m 2 /m 3 and the experiment reactor was made of a 4-mm plexiglass. The experiment was conducted by using two reactor, as one of them was without media, with exactly similar conditions to compare their operations. The standard method (MBAS) was used to measure the anionic surfactant. The concentrations of the examined anionic surfactant were 50, 100, 200, 300, and 400 mg/L in hydraulic retention times (HRTs) of 72, 24 and 8 hours. Results: The removal percentage for both reactors at 50 mg/L concentration of pollutant was same, but after gradually increasing the pollutant concentration and decreasing the HRT, the media-containing reactor had significant efficiency in comparison with the other one. The optimum condition in this experiment was obtained at HRT of about 24 hours and 200 mg/L pollutant concentration with 99.2% removal. Conclusions: Regarding the anionic surfactant standard in Iran which is 1.5 mg/L for surface water discharge, using this process is suitable for treating municipal wastewater and industrial wastewater, containing 100-200 mg/L pollutant. However, for the industries that produce detergents, discharging more than 200 mg/L surfactants to the wastewater, using supplementary treatments for achieving the discharge standard are required.

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Investigating the performance of a novel cyclic rotating-bed biological reactor compared with a sequencing continuous-inflow reactor for biodegradation of catechol in wastewater

Cited by 15 publications

References 15 publications

Efficient Degradation of a Biorecalcitrant Pollutant from Wastewater Using a Fluidized Catalyst-Bed Reactor

Efficient Degradation of a Biorecalcitrant Pollutant from Wastewater Using a Fluidized Catalyst-Bed Reactor

Biodegradation of 2-4-6 trichlorophenol by sequencing batch reactors (SBR) equipped with a rotating biological bed and operated in an anaerobic-aerobic condition

Removal of Sodium Dodecylbenzene Sulfonate by Moving Bed Biofilm Reactor, Using Synthetic Media

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