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Optimization of DEAMOX processes driven by inorganic (sulphide) or organic (VFA) donors with regard to ammonia removal rate and investigation of sludge kinetic characteristicsтезисы доклада
- Авторы: Trukhina A., Gladchenko M., Kalyuzhnyi S.
- Сборник: Abs. book of the International Symposium on Environmental Science and Technology
- Том: 3
- Тезисы
- Год издания: 2011
- Место издания: Dongguan, Guangdong, China
- Первая страница: 80
- Последняя страница: 81
- Аннотация: Biotechnologies for treatment of nitrogeneous wastewater based on anammox process are recognized as cost effective to remove ammonia from wastewater. Recently, a new ANAMMOX-based process called DEAMOX 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 optimisation of both the process 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. Secondly, the in-situ determination of Anammox kinetic characteristics for sulphide and organics DEAMOX sludges were performed. 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.
- Добавил в систему: Гладченко Марина Анатольевна