Nitrogen removal assessment through nitrification rates and media biofilm accumulation in an IFAS process demonstration study

Regmi, Pusker; Thomas, Wes; Schafran, Gary C.; Bott, Charles; Rutherford, Bob; Waltrip, David

doi:10.1016/j.watres.2011.10.009

Cited by 93 publications

(45 citation statements)

References 17 publications

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“…The reduction of HRT has had a significant effect on the efficiency of removal of TKN by anaerobic reactors, IFAS and the system total. Which is consistent with the study by Regmi et al (2011) (13). In the study of Regmi et al, TKN increased with time.…”

Section: Anaerobic Digestion and Ifas System Efficiency In Removing Tsupporting

confidence: 90%

Evaluation of the Efficiency of Integrated Fixed-Film Activated Sludge reactor for Treatment of Wastewater from Vegetable Oil Industries

et al. 2018

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The vegetable oil production industry is one of the types of food industries, which is developing in our country on an ongoing basis. In addition to the development of this industry, one of the important problems in this field is the dangers of this industry for the discharge of various pollutants into the environment, including polluted wastewater to the environment and groundwater and surface health threats Society (1,2). The entry of

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Section: Anaerobic Digestion and Ifas System Efficiency In Removing Tsupporting

confidence: 90%

Evaluation of the Efficiency of Integrated Fixed-Film Activated Sludge reactor for Treatment of Wastewater from Vegetable Oil Industries

et al. 2018

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“…Comparable research in this area generally reports a trend of greater AOB abundance and/or nitrification activity in IFAS media relative to the ML fraction [33,34,45]; although this trend is apparently not universal (e.g., Li et al [32]). The above correlations, in particular the positive association between media biofilm AOB amoA abundance and %NH 4 + -N removal, complement the general findings of prior IFAS studies.…”

Section: Resultsmentioning

confidence: 99%

Application of a Novel Functional Gene Microarray to Probe the Functional Ecology of Ammonia Oxidation in Nitrifying Activated Sludge

et al. 2013

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We report on the first study trialling a newly-developed, functional gene microarray (FGA) for characterising bacterial and archaeal ammonia oxidisers in activated sludge. Mixed liquor (ML) and media biofilm samples from a full-scale integrated fixed-film activated sludge (IFAS) plant were analysed with the FGA to profile the diversity and relative abundance of ammonia-oxidising archaea and bacteria (AOA and AOB respectively). FGA analyses of AOA and AOB communities revealed ubiquitous distribution of AOA across all samples – an important finding for these newly-discovered and poorly characterised organisms. Results also revealed striking differences in the functional ecology of attached versus suspended communities within the IFAS reactor. Quantitative assessment of AOB and AOA functional gene abundance revealed a dominance of AOB in the ML and approximately equal distribution of AOA and AOB in the media-attached biofilm. Subsequent correlations of functional gene abundance data with key water quality parameters suggested an important functional role for media-attached AOB in particular for IFAS reactor nitrification performance and indicate possible functional redundancy in some IFAS ammonia oxidiser communities. Results from this investigation demonstrate the capacity of the FGA to resolve subtle ecological shifts in key microbial communities in nitrifying activated sludge and indicate its value as a tool for better understanding the linkages between the ecology and performance of these engineered systems.

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“…Several studies have produced estimates of biofilm growth and IFAS capabilities of removal toward certain contaminants in municipal and industrial wastewater (AEsøy et al, 1998;Regmi et al, 2011;Hoang et al, 2014), but there is still insufficient data for biofilm's ability to reduce certain amount of pollutant removal for RWTP including turbidity levels.…”

Section: Biological Process For River Quality Improvement Workmentioning

confidence: 99%

Field Testing And Performance Evaluation Of River Water Treatment Plants

Mohiyaden¹

2018

The European Proceedings of Social and Behavioural Sciences

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This paper describes the monitoring works of Integrated Fixed Activated System (IFAS) which are customized to suit its application in river water treatment plant (RWTP) under River of Life (ROL) project that have been monitored by Departments of Irrigation and Drainage (DID) at Klang river and its tributaries.There are seven RWTP selected for monitoring and testing since these RWTP are monitored by the Malaysian Department of Irrigation and Drainage for River of Life Project. Several types of biological carrier in six (6) different RWTPs will be tested for this study. Sampling schedule differ from each RWTP depend on its design and numbers of available chamber and its operation as well as weather condition. Water quality samples from Inlet and Outlet, MLVSS and TVS in the oxidation tank of the RWTP were collected as grab samples for once per month. This IFAS-RWTP can reduce turbidity to acceptable levels, and the effluent water can be achieved to NWQS Class II standard as initial target by the JPS. Further monitoring and analysis are needed to observe the long-term performance in low strength RWTP process in terms of biofilm formation and water quality for better understanding of the IFAS and MBBR processes

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Nitrogen removal assessment through nitrification rates and media biofilm accumulation in an IFAS process demonstration study

Cited by 93 publications

References 17 publications

Evaluation of the Efficiency of Integrated Fixed-Film Activated Sludge reactor for Treatment of Wastewater from Vegetable Oil Industries

Evaluation of the Efficiency of Integrated Fixed-Film Activated Sludge reactor for Treatment of Wastewater from Vegetable Oil Industries

Application of a Novel Functional Gene Microarray to Probe the Functional Ecology of Ammonia Oxidation in Nitrifying Activated Sludge

Field Testing And Performance Evaluation Of River Water Treatment Plants

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