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A novel CSTR-type of hollow fiber membrane biofilm reactor for consecutive nitrification and denitrification
... autotrophic biological nitrogen removal reactors with the bubbleless mass transfer of oxygen and hydrogen through hollow fiber membranes. For nitrification, CSTR-type of HF-MBfR was operated over 400 days and for hydrogenotrophic denitrification, CSTR-type of HF-MBfR was operated over 300 days. Th ...
Desalination 221 (2008)
Nitrification characteristics of PEG immobilized activated sludge at high ammonia and COD loading rates
Autotrophic nitrifiers and heterotrophic bacteria are all oxygen-consuming bacteria. In conventional active sludge, nitrification activities decrease dramatically with increasing COD and ammonia loading rate, as the presence of a large amount of carbonaceous substrate ...
Desalination 222 (2008)
... were achieved in the system. When DO concentration was 2 mg/L and mixed liquor suspended solids, MLSS, concentration was 16 g/L, simultaneous nitrification and denitrification was observed in the system. The effluent turbidity, was always below 1 NTU, equal to or below that of tap water, and aroun ...
Desalination 215 (2007)
What can we learn from old wetlands? Lessons that have been learned and some that may have been forgotten over the past 20 years
... biochemical oxygen demand measured over 5 days and total suspended solids removal in the mid-1980s, moving on to vertical flow beds capable of nitrification in the early 1990s. The development of hybrid systems capable of the previous treatment applications plus denitrification in the late 1990 ...
Desalination 247 (2009)
... to >97% and reduced variations. Phosphorus retention was >88%. Keywords: Landfill leachate; Membrane bioreactor; Sequencing batch reactor; Nitrification 1. Introduction In modern waste treatment, the qualities of wastewaters, spill waters, and leachates, produced in different parts of wast ...
Desalination 191 (2006)
Influence of a prolonged solid retention time environment on nitrification/denitrification and sludge production in a submerged membrane bioreactor
... days—to treat high strength industrial wastewater. Throughout the entire experiment, chemical and biological effects on sludge production and nitrification/denitrification were investigated. The trend of MLSS growth was found to be divided into four phases. An initial growth phase followed by ...
Desalination 245 (2009)
... an aerobic SMBR working at high sludge retention time (SRT) are considered. Work is focused on suspended solids, excess sludge production, and nitrification kinetics. After a complete wastewater characterisation, satisfying prediction is obtained for volatile suspended solids (MLVSS) with defaul ...
Desalination 231 (2008)
... oxidation and the produced insoluble + manganese oxides are removed by filtration. NH4 is biologically oxidized and removed from the water via nitrification and formation of nitrates. As(III) is oxidized but not removed during the biological filtration stage. Arsenic is removed to below 10 µg/L
Desalination 224 (2008)