Simultaneous Organics and Nutrients Removal from Domestic Wastewater in a  Combined Cylindrical Anoxic/Aerobic Moving Bed Biofilm Reactor

Ibrahim, Husham T.; He, Qiang; Al-Rekabi, Wisaam S.

doi:10.19026/rjaset.7.478

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…As the number of people on the earth grows every year, the need for clean water is rising quickly. People are now more aware that climate changes and urbanization are likely to cause less rain in many parts of the world [1]. The problem of managing water quality has a big impact on how river basins are planned and how water pollution is stopped.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2023

BJES

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There is a vacuum created when water goes past a pipe constriction. Air may be pulled into the main flow by drilling a hole in the pipe near where the vacuum happens. Venturi aerator is an example of the application in action. A vacuum is formed at the suction holes of the Venturi tube when there is a small difference in pressure between the input and output sides. To demonstrate the link between total flow rate and Venturi aerator performance, a Venturi aerator (model 1584) was introduced at a specific point in a Biopipe system. For this purpose, a physical model on a pilot scale was constructed and installed in an existing sewage treatment plant. Dissolved oxygen concentrations were measured at four locations along the Biopipe at different values of wastewater flowrates. The study results showed that raising the total flow rate increased the amount of air injected by the Venturi aerator. When the total flow rate was less than 4 m 3 /hour, the Venturi aerator stops sucking air and produces negative consequences.

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Section: Introductionmentioning

confidence: 99%

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2023

BJES

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“…WhileMakowska et al (2005) give higher values of the BOD 5 reduction achieved, ranging from 97.4% to 98.9%, Zhao et al (2006) report higher effi ciency of COD Cr reduction, amounting to 88.5%, with hydraulic wastewater retention time equal to 2.5 hours. Studies byHusham et al (2014) confi rm the high effectiveness of eliminating COD Cr , ranging from 76.2% to 98.6%.…”

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confidence: 95%

Archives of Environmental Protection

Śliz¹,

Bugajski²,

Kurek³

2019

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The aim of the study was to determine the impact of selected factors on the reduction of organic pollutants, expressed in BOD 5 and COD Cr , in wastewater treated in a laboratory scale model of moving bed biofi lm reactor (MBBR). The factors included in the experiment: the degree of fi lling the fl uidized bed with biomass carriers, hydraulic load, and aeration intensity. The tested model of the bioreactor consisted of fi ve independent chambers with diameter D = 0.14 m and height H = 2.0 m, which were fi lled with biomass carriers at 0%, 20%, 40%, 60%, 70% of their active volume. During the test period, hydraulic loads at the level of Q h1 = 0.073 m 3 •m -2 •h -1 and Q h2 = 0.036 m 3 •m -2 •h -1 were applied, which ensured one-day and two-day sewage retention, respectively. The said reactors were subjected to constant aeration at P 1 = 3.0 dm 3 •min -1 and P 2 = 5.0 dm 3 •min -1 . The highest effi ciency of the reduction of the analysed indicators was demonstrated by reactors fi lled with carriers in the degree of 40-60%. Based on the statistical analyses (the analyses of the ANOVA variations and the Kruskal-Wallis test) carried out, it was found that the studied factors signifi cantly modifi ed the mutual interaction in the process of reducing BOD 5 in treated wastewater of the reactors tested. The signifi cance of the impact of the discussed factors on the values of the studied indicators in treated wastewater depends on mutual interactions between the investigated factors.

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Biodegradation of benzotriazoles and hydroxy-benzothiazole in wastewater by activated sludge and moving bed biofilm reactor systems

Mazioti

Stasinakis

Pantazi

et al. 2015

Bioresource Technology

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Two laboratory scale fully aerated continuous flow wastewater treatment systems were used to compare the removal of five benzotriazoles and one benzothiazole by suspended and attached growth biomass. The activated sludge system was operated under low organic loading conditions. The moving bed biofilm reactor (MBBR) system consisted of two serially connected reactors filled with K3-biocarriers. It was either operated under low or high organic loading conditions. Target compounds were removed partially and with different rates in tested systems. For MBBR, increased loading resulted in significantly lower biodegradation for 4 out of 6 examined compounds. Calculation of specific removal rates (normalized to biomass) revealed that attached biomass had higher biodegradation potential for target compounds comparing to suspended biomass. Clear differences in the biodegradation ability of attached biomass grown in different bioreactors of MBBR systems were also observed. Batch experiments showed that micropollutants biodegradation by both types of biomass is co-metabolic.

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Simultaneous Organics and Nutrients Removal from Domestic Wastewater in a Combined Cylindrical Anoxic/Aerobic Moving Bed Biofilm Reactor

Cited by 5 publications

References 15 publications

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Archives of Environmental Protection

Biodegradation of benzotriazoles and hydroxy-benzothiazole in wastewater by activated sludge and moving bed biofilm reactor systems

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