Effects of sponge size and type on the performance of an up-flow sponge bioreactor in primary treated sewage effluent treatment

Nguyen, Tien Thanh; Ngo, Huu Hao; Guo, Wenshan; Johnston, Andrew M.; Listowski, Andrzej

doi:10.1016/j.biortech.2009.07.081

Cited by 61 publications

(23 citation statements)

References 12 publications

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“…The shape, size and nature of carrier material can influence system performance. High organic matter degradation has been reported with several conventional biofilm carrier materials such as sponge [31], bio-balls [32], kaldness [33] and schists [34]. Khoshfetrat et al [35] achieved a COD removal of about 90% using 1,372 pieces of polypropylene support materials in a submerged fixed-film bioreactor treating synthetic wastewater.…”

Section: Resultsmentioning

confidence: 99%

Treatment of produced water in a floating carrier bioreactor

Ezechi

Sapari

Menyechi

et al. 2017

Environmental Engineering Research

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Produced water is the largest wastestream of oil and gas exploration. It consists of various organic and inorganic compounds that hinder its beneficial use. This study compared the treatment of produced water in a batch suspended and biofilm activated sludge process. The biofilm carrier material was made from Gardenia Carinata shell. COD, NH4 + -N and NO3-N removal was monitored in both the suspended (control) and floating carrier bioreactors. The results show a rapid reduction of produced water constituents in the floating carrier bioreactor. COD, NH4 + -N and NO3-N removal was in the range of 99%, 98% and 97% for the floating carrier bioreactor whereas it was 88%, 84% and 83% for the control bioreactor. The rapid reduction of COD, NH4 + -N and NO3-N clearly indicate that the floating carrier materials served as an attached growth medium for microorganisms, improved the breakdown of produced water constituents and reduced inhibition of microbial metabolic activities.

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Section: Resultsmentioning

confidence: 99%

Treatment of produced water in a floating carrier bioreactor

Ezechi

Sapari

Menyechi

et al. 2017

Environmental Engineering Research

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“…While nitrification takes place on the surface of the sponges, denitrification could occur inside the sponge pores where the oxygen concentration is limited. A simultaneous nitrification and denitrification (SND) occurring in the sponges makes a suitable environment for removing nitrogen completely [10]. The TN removal efficiencies at fluxes of 2, 4, 6 LMH were 42 ± 22 %, 36 ± 13 %, and 26 ± 12 %, respectively.…”

Section: Nitrogen Removalmentioning

confidence: 85%

Effect of Flux Condition on Pollutants Removal of Sponge Membrane Bioreactor Treating Hospital Wastewater

Trong¹

2018

JST

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Nowadays, membrane bioreactor (MBR) is an advanced available technology for wastewater treatment due to technical innovations and cost reduction. Especially, the high biomass concentration and long sludge retention time are favourable for the biodegradation of organic pollutants and nitrification. This research aims to study on the treatment performance of two lab-scale submerged membrane bioreactors treating hospital wastewater. One was operated at low fluxes (2, 4, 6 LMH) and the other at higher fluxes (10, 15, 20 LMH). Polyester-urethane cube sponge media (20 % v/v) was added into both reactors for fouling control and simultaneous nitrification denitrification (SND). The results showed that organic removal efficiencies were improved with an increase in flux. The removal efficiencies of COD and total nitrogen were 85-89 % and 26-42 % at low fluxes and 96-97 %, 53-65 % at higher fluxes, respectively. The treated water quality complied with Vietnam National Technical Regulation on health care wastewater, class A.

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“…This indicates that TN removal of the sponge MBR increases with an increasing HRT. In the sponges, nitrification probably takes place on the surface of the sponge, whereas anaerobic/anoxic conditions inside the sponge provide a suitable environment for denitrification (Nguyen et al, 2010). This phenomenon is SND.…”

Section: Nitrogen Removalmentioning

confidence: 99%

Effects of Hydraulic Retention Time on Organic and Nitrogen Removal in a Sponge-Membrane Bioreactor

Bui

Berg

Nguyen

et al. 2013

Environmental Engineering Science

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This is the first study on application of a sponge-membrane bioreactor (sponge MBR) for recirculation of aquaculture wastewater in the Mekong delta, Vietnam. Performance of a sponge MBR with a moving-cube sponge medium (20% v/v) was evaluated at different hydraulic retention times (HRTs) for the specific example of catfish pond wastewater. The sponge MBR was operated at HRT values of 8, 4, and 2 h, which correspond to membrane fluxes of 5, 10, and 20 L/m 2 per hour, respectively. The average chemical oxygen demand (COD) removal efficiencies were maintained at 93%, 94%, and 87% at an HRT of 8, 4, and 2 h, respectively, while the average total nitrogen (TN) removal efficiencies were 84%, 70%, and 57%. The COD and TN removal efficiencies decreased with a decrease in HRT (increase in membrane flux). Permeate concentrations of COD and TN were as low as 6.3 and 2.7 mg/L at the operated HRTs, respectively. Compared to the conventional MBR, the sponge MBR had twice the TN removal capacity at the same HRT due to simultaneous nitrification-denitrification. In addition, results implicated that the fouling rate (dTMP/dt) increased in an inverse proportion with HRT (h) according to the power equation (fouling rate = 4.2474 HRT -2.225 ). Free movement of sponges in the reactor improved fouling due to sweeping of the cake layer on the membrane surface. Results reveal that the sponge MBR was effective in terms of simultaneous organic and nitrogen removal, fouling control, and water recirculation.

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Effects of sponge size and type on the performance of an up-flow sponge bioreactor in primary treated sewage effluent treatment

Cited by 61 publications

References 12 publications

Treatment of produced water in a floating carrier bioreactor

Treatment of produced water in a floating carrier bioreactor

Effect of Flux Condition on Pollutants Removal of Sponge Membrane Bioreactor Treating Hospital Wastewater

Effects of Hydraulic Retention Time on Organic and Nitrogen Removal in a Sponge-Membrane Bioreactor

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