Treatment of a polluted stream by a fixed-bed biofilm reactor with sludge discharger and backwashing system

Park, Y.S; Moon, Jae-Kyu; Kim, D.S; Ahn, Kyunghee

doi:10.1016/j.cej.2004.01.025

Cited by 10 publications

(6 citation statements)

References 6 publications

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“…The biological contact oxidation process (BCOP) is widely applied to eliminate organic matter from domestic sewage [1], industrial organic wastewater [2], and polluted water resources [3]. Also, some engineering methods for river water treatment belong to the BCOP in principle except for the use of a suspended filler [4,5] or ceramic media [6]. However, this research is sentenced on the domestic sewage treatment in conjunction to biological contact oxidation process.…”

Section: Introductionmentioning

confidence: 99%

Relationship between microbial community structures and degradation efficiencies in biological contact process on domestic sewage

et al. 2021

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In order to ascertain the characteristics of two different biofilm reactors and its efficiency, the influence of pH, DO and HRT in the clean-up of COD, NH3-N and TP as well as determining the relationship between microbial community structures and its performance of the two biofilm reactors. This study made use of a biological contact oxidation process system in a small-scale experiment to treat domestic sewage. This contemporary study examined the performance of two different fillers thus, BCF and MBBF in removal of organic pollutants from domestic wastewater as a novel technique of BCOP for sewage treatment. Two self-made biological contact biofilm reactors were used for the experiment: BCR (mounted with BCF) and MBBR (mounted with MBBF). After the biological treatment, the COD concentration of effluent could stay below 350 mg/L. The study analyzed the effects of hydraulic residence time (HRT) on COD, ammonia nitrogen (NH3-N), and total phosphorus (TP) as well as the characteristics of each biofilm filler. The optimal HRT was 12 h; at that time, the experimental results indicated that BCF had higher removal efficiency of chemical oxygen demand, ammonia-nitrogen and total phosphorus at 50%, 96%, and 86%, respectively. Great contribution was made by the process by means of improving the biodegradability of domestic sewage and reducing sludge emergence via fermentation in the biological reactor.

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Section: Introductionmentioning

confidence: 99%

Relationship between microbial community structures and degradation efficiencies in biological contact process on domestic sewage

et al. 2021

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“…It has been applied to remove organic matter from domestic sewage [17], industrial organic wastewater [18], and polluted water resources [19]. Also, some engineering methods for river water treatment belong to the BCOP in principle except for the use of a suspended filler [13,14] or ceramic media [15]. However, long-term removal efficiencies of nitrogen and phosphorus of a BCOP for river water treatment is seldom studied.…”

Section: Introductionmentioning

confidence: 99%

“…The system was built on the riverbank or in the waste ponds near the river, receiving and treating the diffluent river water, and finally discharging the treated water into the original riverway. A number of technologies of ecological type, such as land treatment system [5], natural or constructed wetland system [6][7][8][9][10] , and oxidation pond system [11], as well as engineering methods, such as nitrification bio-reactor [12], suspended filler moving-bed [13], suspended carrier biofilm reactor [14], fixed-bed biofilm reactor [15], and seepage biological bed [16], were exploited to treat polluted river water with huge fluctuation of water quality under the local conditions. The biological contact oxidation process (BCOP), also called submerged biological filter or contact aeration system, is a hybrid wastewater treatment system, taking the advantages of both activated sludge process and biofilm process, e.g., no bed clogging and sludge bulking.…”

Section: Introductionmentioning

confidence: 99%

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Field experiment on biological contact oxidation process to treat polluted river water in the Dianchi Lake watershed

Xie

Zhang

et al. 2009

Front. Environ. Sci. Eng. China

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In this study two types of biological contact oxidation processes (BCOP), a step-feed (SBCOP) unit and an inter-recycle (IBCOP) unit, were designed to investigate the treatment of heavily polluted river water. The Daqing River, which is the largest pollutant contributor to the Dianchi Lake, one of the most eutrophic freshwater lakes in China, was taken for the case study. It was found that the SBCOP had higher adaptability and better performance in the reduction of COD, TN, and TP, which made it applicable for the treatment of polluted river water entering the Dianchi Lake. Nitrification rate was observed to be greatly affected by the influent temperature. During each season, the nitrification in the SBCOP was higher than that in the IBCOP. TN removal efficiency in the SBCOP was higher than that in the IBCOP during the winter and spring but poorer during the summer, possibly due to the inhibition of denitrification by higher dissolved oxygen level in the summer. Moreover, symbiotic algaebacteria growth may be conducive to the removal of pollutants.

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“…There are a great many purification methods for polluted rivers, such as physical [ 4 , 5 ], chemical [ 6 ], and ecological [ 7 , 8 ]. Ecological purification technology is a promising approach to treatment of low-polluted water because it is inexpensive, has low maintenance requirements, and produces no harmful byproducts compared to the other methods [ 9 , 10 ]. Previous studies have shown the removal efficiency in stationary case [ 11 ] or in the single unit [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Application of QUAL2K Model to Assess Ecological Purification Technology for a Polluted River

Zhu

Niu

Zhang

et al. 2015

IJERPH

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Industrialization and urbanization have caused water pollution and ecosystem degradation, especially in urban canals and rivers in China; accordingly, effective water quality improvement programs are needed. In this study, the Tianlai River in Jiangsu, China was taken as a research site, and a combination of ecological purification technologies consisting of biological rope, phytoremediation, and activated carbon were applied in a laboratory-scale study to examine degradation coefficients under dynamic water conditions. Coefficients were then input into the QUAL2K model to simulate various hypothetical scenarios and determine the minimum density of ecological purification combination and hydraulic retention time (HRT) to meet Grade V or IV of the China standard for surface water. The minimum densities for Grade V and IV were 1.6 times and 2 times the experimental density, while the minimum HRTs for Grade V and IV were 2.4 day and 3 day. The results of this study should provide a practical and efficient design method for ecological purification programs.

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Treatment of a polluted stream by a fixed-bed biofilm reactor with sludge discharger and backwashing system

Cited by 10 publications

References 6 publications

Relationship between microbial community structures and degradation efficiencies in biological contact process on domestic sewage

Relationship between microbial community structures and degradation efficiencies in biological contact process on domestic sewage

Field experiment on biological contact oxidation process to treat polluted river water in the Dianchi Lake watershed

Application of QUAL2K Model to Assess Ecological Purification Technology for a Polluted River

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