Feasibility of Anaerobic Ammonium Oxidation in the Presence of Bicarbonate
01 Jan 2017-pp 93-99
TL;DR: From the results of this study, the new process may be employed for the economic removal of ammonia from wastewaters having low to moderate concentrations of ammonia.
Abstract: Mixed culture enriched for anammox process over 400 days were used in this study to check the feasibility of anaerobic ammonia oxidation in the presence of HCO3 −. Batch studies proved the feasibility of bio-chemical anaerobic ammonia oxidation in the presence of HCO3 − and the ammonia removal obtained was around 36 % within 24 h. The role of bicarbonate as an electron acceptor yet to be proved thermodynamically. The batch kinetic studies showed that the rate of anoxic ammonia oxidation was higher within 2 h and the rate of ammonia oxidation increased as the concentration of ammonia increased. The total nitrogen removal from the system was very effective without having much accumulation of NO2 − and NO3 −. The specific substrate utilization rate of the biomass for ammonia oxidation was 31 mg/g MLVSS/h. From the results of this study, the new process may be employed for the economic removal of ammonia from wastewaters having low to moderate concentrations of ammonia.
01 Jan 1992
TL;DR: The most widely read reference in the water industry, Water Industry Reference as discussed by the authors, is a comprehensive reference tool for water analysis methods that covers all aspects of USEPA-approved water analysis.
Abstract: Set your standards with these standard methods. This is it: the most widely read publication in the water industry, your all-inclusive reference tool. This comprehensive reference covers all aspects of USEPA-approved water analysis methods. More than 400 methods - all detailed step-by-step; 8 vibrant, full-color pages of aquatic algae illustrations; Never-before-seen figures that will help users with toxicity testing and the identification of apparatus used in the methods; Over 300 superbly illustrated figures; A new analytical tool for a number of inorganic nonmetals; Improved coverage of data evaluation, sample preservation, and reagant water; And much more!
TL;DR: It is suggested that the SBR could be used for the enrichment and quantitative study of a large number of slowly growing microorganisms that are currently out of reach for microbiological research.
Abstract: Currently available microbiological techniques are not designed to deal with very slowly growing microorganisms. The enrichment and study of such organisms demands a novel experimental approach. In the present investigation, the sequencing batch reactor (SBR) was applied and optimized for the enrichment and quantitative study of a very slowly growing microbial community which oxidizes ammonium anaerobically. The SBR was shown to be a powerful experimental set-up with the following strong points: (1) efficient biomass retention, (2) a homogeneous distribution of substrates, products and biomass aggregates over the reactor, (3) reliable operation for more than 1 year, and (4) stable conditions under substrate-limiting conditions. Together, these points made possible for the first time the determination of several important physiological parameters such as the biomass yield (0.066 ± 0.01 C-mol/mol ammonium), the maximum specific ammonium consumption rate (45 ± 5 nmol/mg protein/min) and the maximum specific growth rate (0.0027 · h−1, doubling time 11 days). In addition, the persisting stable and strongly selective conditions of the SBR led to a high degree of enrichment (74% of the desired microorganism). This study has demonstrated that the SBR is a powerful tool compared to other techniques used in the past. We suggest that the SBR could be used for the enrichment and quantitative study of a large number of slowly growing microorganisms that are currently out of reach for microbiological research.
TL;DR: This paper deals with a review of novel biological nitrogen elimination technologies under anaerobic or oxygen limited conditions and addresses the specifics of process, microbial diversity, performance characteristics and the future challenges for application.
TL;DR: A new anaerobic ammonium oxidizing bacterium with a defined niche: the co-oxidation of propionate and ammonium in the presence of ammonium, nitrite and nitrate is described.
TL;DR: A strain YZN-001 was isolated from swine manure effluent and identified as Pseudomonas stutzeri, indicating that the strain has heterotrophic nitrification and aerobic denitrification abilities, with the notable ability to remove ammonium at low temperatures, demonstrating a potential using the strain for future application in waste water treatment.
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