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Novel Anammox membrane electro-bioreactor

Elektorowicz M., Hosseini S., Ibeid S.

Architecture Civil Engineering Environment

2016

Vol. 9, no. 3

123--128

This paper presents an alternative method for nitrogen removal using modified membrane reactor. A novel Anammox submerged membrane electro-bioreactor (Anammox-SMEBR) was developed to enhance nitrogen removal from municipal wastewater. At lab scale a comparison between continuous flow MBE and Anammox-SMEBR reactors was conducted. The novel reactor removed nitrate and ammonia by over 95% and 97%, respectively. The removal was due to subsequent application of aerobic and anoxic conditions in the same reactor. On other hand, MBR was able to remove ammonia by 60 to 76%, while nitrates were produced. Simultaneously, COD and phosphorous removals in MBR were also lower than in Anammox-SMEBR.

W artykule przedstawiono alternatywną metodę usuwania azotu z wykorzystaniem zmodyfikowanego reaktora membranowego. Technologia elektro-bioreaktora z membranami zanurzonymi i bacteriami anamoks (Anammox-SMEBR) została opracowany w celu zwiększenia efektywności usuwania azotu ze ścieków komunalnych. Wykonano porównanie wyników badań laboratoryjnych dla reaktora o ciągłym przepływie MBE oraz reaktora Anammox-SMEBR. Nowatorska metoda pozwala na usunięcie ponad 95% azotanów i 97% amoniaku dzięki zastosowaniu alternatywnych warunków tlenowych i beztlenowych w tym samym reaktorze. Równocześnie w reaktorze MBE uzyskano usunięcie amoniaku od 60 do 76%.Jednocześnie, stopień usunięcia węgla organicznego i fosforu w reaktorze MBR był również niższy niż w Anammox-SMEBR.

Biological nutrient removal using a novel five-step continuous flow activated sludge process technology

Abualhai S., Naseer R., Xiwu L.

Environment Protection Engineering

2013

Vol. 39, nr 3

165--184

An anaerobic-anoxic/oxic (AA/O) five-tank biological process called five-step continuous flow activated sludge process (FSCFASP) was developed to force the oscillation of organic matter and nutrient concentrations in process reactors. The run scheme and schematic diagram of FSCFASP was described. The run cycle was divided into two symmetrical half cycles with eight periods during each cycle. The duration of each period was established according to biological process requirements. The optimal running times of the periods were 90, 60, 60, 30, 90, 60,6 0 and 30 min at the HRT of 16 h, air/water ratio of 35% and SRT of 21 day at the temperature range of 19-23 °C. The optimized system achieved 88.09±1.43%, 90.33±2.9%, 68.83±5.34% and 87.67±2.9% of the chemical oxygen demand, NH4+-N, TN, and TP removal efficiencies, respectively, during a 11-month operation with the effluent meeting the Chinese sewage discharge standard GB18918-2002 (level A). Simultaneous nitrification and denitrification phenomena were observed in the tank one which is important to reduce the quantity of aeration and the duration of a next anoxic state. Compared with other existing technologies, this system achieved high nitrogen and phosphorus removal without equipment of sludge and mixed liquor return. Thus, it is effective for reducing energy consumption.