Wastewater treatment with combined upflow anaerobic fixed-bed and suspended aerobic reactor equipped with a membrane unit

Kocadagistan, Beyhan; Kocadagistan, Erdem; Topçu, Nazmi; Demircioğlu, Nuhi

doi:10.1016/j.procbio.2003.11.055

Cited by 17 publications

(7 citation statements)

References 18 publications

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“…In an attempt to develop a more cost-effective, simple, and stable WWTP for small communities, many studies have focused on a combination of the anaerobic and aerobic processes (Bodik et al, 2003;Luostarinen et al, 2006), for example, the anaerobic-filteractivated sludge system (Kocadagistan et al, 2005), upflowanaerobic-sludge-blanket-attached aerobic filter (Chernicharo and Machado, 1998;Collivignarelli et al, 1990), and anaerobicbaffled-reactor-activated sludge system (Garuti et al, 1992). These systems have some advantages, such as their low excess sludge production and low energy consumption, while their partial denitrification and poor removal of organic matter in the anaerobic reactor at low temperature make it difficult to select an appropriate following aeration process to remove residual organic matter and nitrogen (Bodik et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Performance of a Full‐Scale Biofilm System Retrofitted with an Upflow Multilayer Bioreactor as a Preanoxic Reactor for Advanced Wastewater Treatment

Kwon

Ahn³

et al. 2008

Water Environment Research

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To enhance nitrogen removal in an existing microbial contact oxidation (MCO) system with a treatment capacity of 900 m 3 /d, an upflow multilayer bioreactor (UMBR) was chosen as a preanoxic reactor for the removal of organic matter and nitrate. The removal performance of the retrofitted plant was evaluated during the startup phase at a low temperature in winter. The high removal (.80%) of organic matter and suspended solids in the UMBR provided stable nitrification conditions in the MCO system, as a result of the substantial reduction in organic matter and solids loaded onto the MCO system. This treatment system showed a stable nitrogen removal efficiency of 75.3%, even in the low temperature range 7 to 108C. Phosphorus was completely removed by chemical precipitation. Production rates of excess sludge, as a function of the loads of influent flowrate and biological oxygen demand (BOD), were 0.022 kg dry solid/m 3 wastewater and 0.132 kg dry solid/kg BOD. Water Environ. Res., 80, 757 (2008).

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Section: Introductionmentioning

confidence: 99%

Performance of a Full‐Scale Biofilm System Retrofitted with an Upflow Multilayer Bioreactor as a Preanoxic Reactor for Advanced Wastewater Treatment

Kwon

Ahn³

et al. 2008

Water Environment Research

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“…Several technologies that used in hospital waste water treatment are: Activated Sludge Combined with Biological Contactor (Greentech, 2001), Anaerobic-Aerobic Fixed Film Bioreactor (A2F2B) (Rezaee et al, 2005), Submerged Membrane Bioreactor (SMB) (Wen et al, 2004), Combination of Up flow Anaerobic Fixed-Bed (UAF-B) and Suspended Aerobic Reactor (SAR) (Kocadagistan et al, 2005), up flow Anaerobic Sludge Blanket and Aerobic Sequential Batch Reactor (Farooqi et al, 2008). Nonetheless, these technologies have not been degrading the concentration of the pollutants optimally.…”

Section: Figure 1 Af2b Reactormentioning

confidence: 99%

The Influence of Starter Volume and Air Flowrate in Hospital Waste Water Treatment Using Aerobic Fixed Film Biofilter Batch (Af2b) Reactor

Prayitno

Saroso

Rulianah

et al. 2017

JBAT

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BOD, COD, phenol and ammonia-free in the effluent of hospitals wastewater often exceed the quality standards. This was due to less optimal biological processes to degrade the pollutants. So we need an efforts to find optimal process conditions through the engineering process and the factors that affect the biodegradation of pollutants. On the other hand, AF2B reactor containing biofilter with bee nest shaped has a large specific surface area so as to maximize the biodegradation process of pollutants by microorganisms. While bacteria consortium consisting of several types of bacteria have a greater capacity than a single bacterium in the degradation of pollutants. The research aims to determine the effect of starter volume and air flowrate to decrease the concentration of pollutants (BOD, COD, phenol and ammonia-free) in AF2B reactor batch using a bacterial consortium. The research was conducted in three phase which are the making of growth curve, acclimatization and biodegradation of pollutants in an AF2B reactor batch using a bacterial consortium. The experiment variables are the starter volume (85%, 75%, 65% in volume), and the air flowrate (2.5; 5; and 7.5 liter/min). Materials used are hospital waste water and bacterial consortium. The experiment begins with setting up the AF2B reactor containing biofilter with bee nest shaped and then filled it with a starter from the acclimatization process on a given volume and followed by supplies of air at a certain flowrate. Then hospital waste water and 5% of nutrients were added till reach 10 liters of total volume in reactor. Samples were taken every 30 minutes for up to 360 minutes of biodegradation process. The samples were then analyzed its pollutants concentration (BOD, COD, phenol and ammonia-free). The BOD concentration was analyzed using Winkler bottles method, COD using open reflux method, while phenol and ammonia-free using UV-Vis spectrophotometry method. The results showed that the starter volume and air flowrate affect the decrease of pollutants concentration till reach quality standard, which at starter volume of 85%, air flowrate of 7.5 liter/min and biodegradation time of 360 min can reduce the BOD, COD, phenol, and ammonia-free to 92%, 86%, 88% and 76% respectively.

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“…During the first 60 cm, in all cases, the pH tend to decrease mainly because of volatile fatty acids (VFA) formation and then, in the following sections, the VFA are consumed by methanogenic bacteria causing the pH to increase (Gannouna et al 2008;Ward et al 2008). The upper part of the filter is in direct contact with atmospheric air and the oxygen tends to diffuse through the water surface making the pH slightly to increase (Noyola 1993; Kocadagistan et al 2005). These curves show no significant differences between higher and lower organic loading rates: different organic loads and HRT do not affect the pH behaviour in the filter.…”

Section: Phmentioning

confidence: 99%

“…Cellular retention times of 20 days and organic loading rates up to 15 kgCOD/m 3 ?d in these systems are common (Noyola 1993). Modern approaches include the combination of anaerobic filters with aerobic polishing systems (Kocadagistan et al 2005) and its use for industrial wastewater (Omil et al 2003;Rao et al 2005). Basically, a combined filter is considered a plug-flow reactor where arising gas bubbles and changes of the expected hydraulic patterns can cause a deviation of the ideal behaviour (Young & Dahab 1983).…”

Section: Introductionmentioning

confidence: 99%

Wastewater treatment in an anaerobic filter using small lava stones as filter media without temperature control

González‐Martínez

González-Barceló

Flores-Torres

2011

Water Science and Technology

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For their simplicity and using cheap support materials, biological filtration of municipal wastewater can be adequate for developing countries where the legislation is not as strict as in other countries, like the members of the European Union. Biological filters are fixed biomass reactors where the suspended pollutants can easily be retained and the dissolved substances can be transformed by microbial activity. A pilot anaerobic filter was built and filled with lava stones sieved to obtain particles with an average size of 6 mm. The filter was fed with municipal wastewater during 220 days under hydraulic retention times (HRT) of 4.3 and 9.8 hours (average organic loading rates of 0.48 and 1.23 kg COD/m(3) d). The results show that the pH did not change significantly during the process. Lower organic loading rates (higher HRT) resulted in better COD and TSS removal rates. Average biogas composition showed methane to be 67% for the lower organic loading rate and 63% for the higher one. Backwashing with air for 5 minutes every 72 hours did not negatively affect the overall anaerobic process. Average TSS removal was 79 and 73% for the higher and lower HRT (lower and higher organic loading rates), respectively. The overall performance of the anaerobic filter is comparable with the reported values in the literature. The COD and TSS removal rates are slightly inferior to the ones reported in the literature for UASB reactors treating municipal wastewater.

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Wastewater treatment with combined upflow anaerobic fixed-bed and suspended aerobic reactor equipped with a membrane unit

Cited by 17 publications

References 18 publications

Performance of a Full‐Scale Biofilm System Retrofitted with an Upflow Multilayer Bioreactor as a Preanoxic Reactor for Advanced Wastewater Treatment

Performance of a Full‐Scale Biofilm System Retrofitted with an Upflow Multilayer Bioreactor as a Preanoxic Reactor for Advanced Wastewater Treatment

The Influence of Starter Volume and Air Flowrate in Hospital Waste Water Treatment Using Aerobic Fixed Film Biofilter Batch (Af2b) Reactor

Wastewater treatment in an anaerobic filter using small lava stones as filter media without temperature control

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