Simultaneous Bioenergy (CH4) Production and Nitrogen Removal in a Combined Upflow Anaerobic Sludge Blanket and Aerobic Membrane Bioreactor†

2008 ◽  
Vol 22 (1) ◽  
pp. 103-107 ◽  
Author(s):  
Yingyu An ◽  
Fenglin Yang ◽  
Fook Sin Wong ◽  
Hwee Chuan Chua
Keyword(s):  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Upflow Anaerobic Sludge Blanket ◽  
Anaerobic Sludge ◽  
Ch4 Production ◽  
Anaerobic Sludge Blanket

Importance of the ammonia volatilization rates in shallow maturation ponds treating UASB reactor effluent

2012 ◽  
Vol 66 (6) ◽  
pp. 1239-1246 ◽  
Author(s):  
Fernando Augusto Lopes de Assunção ◽  
Marcos von Sperling
Keyword(s):  
Nitrogen Removal ◽  
Ammonia Volatilization ◽  
Ammonia Nitrogen ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Unit Surface Area ◽  
In Series ◽  
Belo Horizonte ◽  
Anaerobic Sludge Blanket

This study aimed at determining the influence of ammonia volatilization on nitrogen removal in polishing (maturation) ponds treating sanitary effluent from upflow anaerobic sludge blanket (UASB) reactors in the city of Belo Horizonte, Brazil. An apparatus for the capture and absorption of volatilized ammonia in three polishing ponds in series was installed. Volatilized ammonia was captured by a chamber on the surface of the ponds and dissolved in boric acid solution, in order to estimate the amount of ammonia per unit surface area of each pond. Low rates of volatilization, below 0.2 kg/ha.d, in about 75% of samples from all the ponds, were observed. The mass balance of ammonia nitrogen of the ponds showed that the volatilization represented only about 2% of the total removal of nitrogen from the polishing ponds. The results obtained suggest that ammonia volatilization was a mechanism of little importance in nitrogen removal in the investigated polishing ponds.

Influence of temperature and pH on nitrogen removal in a series of maturation ponds treating anaerobic effluent

2013 ◽  
Vol 67 (10) ◽  
pp. 2241-2248 ◽  
Author(s):  
Fernando Augusto Lopes de Assunção ◽  
Marcos von Sperling
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Hydraulic Retention Time ◽  
Upflow Anaerobic Sludge Blanket ◽  
Uasb Reactor ◽  
Anaerobic Sludge ◽  
Influence Of Temperature ◽  
Operational Conditions ◽  
Anaerobic Sludge Blanket ◽  
Influence Of Ph

This paper presents an evaluation of the influence of pH and temperature on nitrogen removal in a series of three shallow maturation ponds serving as post-treatment of upflow anaerobic sludge blanket (UASB) reactor effluent (approximately 200 population equivalent). Monitoring was from January 2007 to May 2009. Throughout this period, the ponds maintained relatively stable operational conditions in terms of depth and hydraulic retention time, thus enabling the evaluation of the influence of variations in temperature and pH on the performance in terms of nitrogen removal. In general, as expected, the removal of nitrogen was more effective when the temperature and pH of the ponds were higher, implying that these variables are relevant in the removal of nitrogen. Due to the fact that these parameters are included in the prediction equations for effluent ammonia and total nitrogen found in traditional models from the literature, fitting of the models to the experimental data was investigated. The models gave acceptable fittings in the estimation of effluent concentrations of ammonia and total nitrogen from maturation ponds treating UASB reactor effluent.

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