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The comparison of DEAMOX processes driven by inorganic (sulphide) or organic (VFA) donors with regard to sludge kinetic characteristics and ammonia removal rateтезисы доклада
- Авторы: Trukhina A., Gladchenko M., Kalyuzhnyi S.
- Сборник: Abs. Book of the International Conference “Protection and Restoration of the Environment X
- Тезисы
- Год издания: 2010
- Место издания: Corfu, Greece
- Первая страница: 74
- Аннотация: Wastewaters from many industries have a high content of nitrogen species exceeding in tens and hundreds times discharge limit concentrations. Discharging such wastewaters is a cause of eutrophication of natural water making it unsuitable for swimming, fishing and drinking. So, the development of new approaches for treatment of nitrogeneous wastewater is the major and challenging problem over the world. Biotechnologies based on anammox process are recognized as cost effective to remove ammonia from wastewater. Recently, a new ANAMMOX-based process called DEAMOX (DEnitrifying AMmonia OXidation) was developed. In this process, the ANAMMOX reaction is combined with autotrophic denitratation using inorganic (e.g., sulphide) or organic (e.g., VFA) electron donor for the production of nitrite from nitrate within an anaerobic biofilm. This paper firstly reports about the in-situ determination of Anammox kinetic characteristics for sulphide and organics DEAMOX sludges. These studies revealed that the apparent affinity constant for ammonium for organic driven DEAMOX sludge was higher than that for sulphide driven one. The difference may be explained by the size of aggregates formed by both the sludges. The diameter of aggregates formed by the sulphide driven sludge was about 1-2 mm while the sludge from the organics driven DEAMOX process consisted of the larger aggregates (3-5 mm). Since anammox bacteria are usually located in the central part of the aggregates, ammonium has a longer diffusion path before it reaches this central part in the larger aggregates. Secondly, the optimisation of both the process was performed with regard to ammonia removal rate (ARR). Both approaches for a stepwise increase of ammonia loading rate (ALR) were explored: i) the increase of influent substrate concentrations under fixed hydraulic retention time (HRT) and ii) the decrease of HRT under fixed influent substrate concentrations. Though these investigations are still in progress, it seems that the second approach allows reaching higher ARRs in shorter time. All the results obtained as well as a comparison of both the versions (inorganic or organic donor) of the DEAMOX process will be presented at the time of submission of full paper (April, 2010).
- Добавил в систему: Гладченко Марина Анатольевна