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Mainstream partial nitritation was studied at 10 °C in a moving bed biofilm reactor treating synthetic wastewater containing both nitrogen (≈40 mg L) and organic carbon at COD/N ratio ranging from 1.3 to 2.2. Three different control strategies were investigated to achieve partial nitritation. Initially, biofilm age was controlled by incorporating a media replacement strategy. Next, separately from the media replacement, oxygen limited conditions were investigated and finally pH control was incorporated together with oxygen limitation. Successful partial nitritation was achieved only by combining oxygen limitation with pH control. The average NH-N concentration was equal to 16.0 ± 1.6 mg L and average NO-N concentration was equal to 15.7 ± 2.4 mg L during steady state partial nitritation. The average residual NO-N concentration was equal to 2.6 ± 2.2 mg L. The results obtained from this study prove for the first time that partial nitritation can be successfully controlled in a biofilm reactor treating wastewater with low nitrogen concentration, relatively high COD/N ratio and at low temperature. An algorithm for dynamic process control of partial nitritation has been also developed.
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A lab-scale partial nitritation SBR was operated at 11 °C for 300 days used for the treatment of high-ammonium wastewater, which was inoculated with activated sludge from Rovaniemi WWTP (located in...
A lab-scale partial nitritation granular sludge air-lift reactor was operated in continuous mode treating low strength synthetic medium (influent ca. 50 mg-N-NH/L). Granules were initially stratifie...
Ammonium (NH-N) adsorption capacity of zeolite varies from place to place, a unique attempt to use different zeolite as adsorbent media in sequencing biofilm batch reactor (SBBR) for maintaining appro...
Effects of triclosan (TCS) on performance, microbial community and antibiotic resistance genes (ARGs) during partial denitrification (PD) were investigated in a sequencing moving bed biofilm reactor (...
Single-stage nitrogen removal by anammox/partial-nitritation (SNAP) process was proposed and explored in a packed-bed-EGSB reactor to treat nitrogen-rich wastewater. With dissolved oxygen (DO) maintai...
The purpose of this study is to determine in situ the bacterial viability, thickness and bacterial diversity of a biofilm formed on different substrates in comparison to a naturally tooth-...
The objective is to establish the effect of sour taste and cold temperature on the pharyngeal swallowing transit time after ischemic hemisphere stroke.
This study evaluates three batches consistency, immunity duration and safety of inactivated Enterovirus 71(EV-A71) vaccine(vero cell) post-marketing among children aged 6-35months in China...
Controlling hypothermia is essential in anesthesia to limit postoperative complications. Temperature monitoring is therefore essential. However, the reliability of esophageal temperature d...
The purpose of the study is to evaluate the effect of cold exposure on an individual's glucose tolerance. Previous research has already shown that 10 days acclimation to a mild cold enviro...
Liquid, solid, or gaseous waste resulting from mining of radioactive ore, production of reactor fuel materials, reactor operation, processing of irradiated reactor fuels, and related operations, and from use of radioactive materials in research, industry, and medicine. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
An absence of warmth or heat or a temperature notably below an accustomed norm.
A constellation of responses that occur when an organism is exposed to excessive cold. In humans, a fall in skin temperature triggers gasping, hypertension, and hyperventilation.
A climate characterized by COLD TEMPERATURE for a majority of the time during the year.
Cellular receptors which mediate the sense of temperature. Thermoreceptors in vertebrates are mostly located under the skin. In mammals there are separate types of thermoreceptors for cold and for warmth and NOCICEPTORS which detect cold or heat extreme enough to cause pain.