Nutrients removal from municipal wastewater by chemical precipitation in a moving bed biofilm reactor

Wang, X.J.; Xia, Siqing; Chen, L.; Zhao, Junming; Jaffrezic‐Renault, Nicole; Chovelon, Jean‐Marc

doi:10.1016/j.procbio.2005.10.015

Cited by 206 publications

(87 citation statements)

References 16 publications

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“…So far the results obtained from lab sale and full sale units suggest useful application of moving bed biofilm reactors (MBBR) systems for aerobic post-treatment [8,9]. MBBR provides a long biomass retention time and accommodate high loading rates without any problems of clogging [10]. In a MBBR, the bacteria are fixed in a biofilm on a carrier.…”

Section: Introductionmentioning

confidence: 99%

Treatment of domestic wastewater in an up-flow anaerobic sludge blanket reactor followed by moving bed biofilm reactor

Tawfik

El‐Gohary

Temmink

2009

Bioprocess Biosyst Eng

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The performance of a laboratory-scale sewage treatment system composed of an up-flow anaerobic sludge blanket (UASB) reactor and a moving bed biofilm reactor (MBBR) at a temperature of (22-35°C) was evaluated. The entire treatment system was operated at different hydraulic retention times (HRT's) of 13.3, 10 and 5.0 h. An overall reduction of 80-86% for COD total ; 51-73% for COD colloidal and 20-55% for COD soluble was found at a total HRT of 5-10 h, respectively. By prolonging the HRT to 13.3 h, the removal efficiencies of COD total , COD colloidal and COD soluble increased up to 92, 89 and 80%, respectively. However, the removal efficiency of COD suspended in the combined system remained unaffected when increasing the total HRT from 5 to 10 h and from 10 to 13.3 h. This indicates that, the removal of COD suspended was independent on the imposed HRT. Ammonia-nitrogen removal in MBBR treating UASB reactor effluent was significantly influenced by organic loading rate (OLR). 62% of ammonia was eliminated at OLR of 4.6 g COD m -2 day -1 . The removal efficiency was decreased by a value of 34 and 43% at a higher OLR's of 7.4 and 17.8 g COD m -2 day -1 , respectively. The mean overall residual counts of faecal coliform in the final effluent were 8.9 9 10 4 MPN per 100 ml at a HRT of 13.3 h, 4.9 9 10 5 MPN per 100 ml at a HRT of 10 h and 9.4 9 10 5 MPN per 100 ml at a HRT of 5.0 h, corresponding to overall log 10 reduction of 2.3, 1.4 and 0.7, respectively. The discharged sludge from UASB-MBBR exerts an excellent settling property. Moreover, the mean value of the net sludge yield was only 6% in UASB reactor and 7% in the MBBR of the total influent COD at a total HRT of 13.3 h. Accordingly, the use of the combined UASB-MBBR system for sewage treatment is recommended at a total HRT of 13.3 h.

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Section: Introductionmentioning

confidence: 99%

Treatment of domestic wastewater in an up-flow anaerobic sludge blanket reactor followed by moving bed biofilm reactor

Tawfik

El‐Gohary

Temmink

2009

Bioprocess Biosyst Eng

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“…Thus, it is necessary to reduce the concentration of phosphorus in secondary wastewater to prevent the algal bloom. Actually, phosphorus removal techniques fall into three main categories: physical, chemical and biological (Wang, et al, 2006). Among them, chemical removal techniques, using metal salts, are reliable and well-established processes (Yeoman, et al, 1988;Wang, et al, 2005 andLee, et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus removal in low alkalinity secondary effluent using alum

Banu

Yeom

2007

Int. J. Environ. Sci. Technol.

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ABSTRACT:The alkalinity plays an important role in phosphorus removal using coagulant. The dosage of coagulant in the low alkalinity wastewater is limited due to rapid pH changes. In the present study, a series of jar test was conducted using low alkalinity wastewater (50 mg/L) to evaluate the optimum pH, dosage and performance parameters (slow mixing and settling time) for the common coagulant alum. From the experiment, it was found that the dosage of coagulant and removal of phosphorus depend upon the pH of the wastewater after adding coagulant. The final optimum pH for efficient P removal was found to be within the range of 5.7-5.9. This range acts as an indicator and it is the maximum tolerable pH range for phosphorus removal for low alkalinity wastewater. The optimum time for slow mix and settling was found to be 20 min. The optimum mole ratio of alum to remove one mole of phosphorous was found to be 2.3. The alum coagulation at pH 7 produced effluent with the total residual phosphorus and reactive phosphorus content of 0.3 and 0.9 mg/L, respectively.

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“…For instant Vendramel et al reported that with influent COD 500 mg/L, OLR 0.5 kg BOD 5 /m 3 .d and HRT 24 h, the removal efficiency of COD and TOC was achieved 80 ± 6 and 56 ± 7 respectively (16). Although MBBR provides a long biomass retention time and hold high loading rates without any problems of clogging (15). However, on the basis of results, it can be concluded that with an increase in OLR ammonia concentration in the final effluent (11,17) and COD will be an increase.…”

Section: Discussionmentioning

confidence: 96%

Upgrading of the Mirmohana Wastewater Treatment Plant in Kish Island, Iran, using a moving bed biofilm reactor

et al. 2014

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Background and purpose: The performance of full-scale moving bed biofilm reactor (MBBR) was evaluated as an alternative for upgrading of Kish Island Mirmohana wastewater treatment plant. In this study activated sludge process upgrade to MBBR process and different operating parameters were compared. Materials and Methods: Conclusion:Hence, MBBR process is a good alternative for upgrading wastewater plants especially when they have inadequacy space or need modification that will require a large investment.

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Nutrients removal from municipal wastewater by chemical precipitation in a moving bed biofilm reactor

Cited by 206 publications

References 16 publications

Treatment of domestic wastewater in an up-flow anaerobic sludge blanket reactor followed by moving bed biofilm reactor

Treatment of domestic wastewater in an up-flow anaerobic sludge blanket reactor followed by moving bed biofilm reactor

Phosphorus removal in low alkalinity secondary effluent using alum

Upgrading of the Mirmohana Wastewater Treatment Plant in Kish Island, Iran, using a moving bed biofilm reactor

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