Ammonia removal in food waste anaerobic digestion using a side-stream stripping process.

Three 35-L anaerobic digesters fed on source segregated food waste were coupled to side-stream ammonia stripping columns and operated semi-continuously over 300 days, with results in terms of performance and stability compared to those of a control digester without stripping. Biogas was used as the stripping medium, and the columns were operated under different conditions of temperature (55, 70, 85 °C), pH (unadjusted and pH 10), and RT (2-5 days). To reduce digester TAN concentrations to a useful level a high temperature (≥70 °C) and a pH of 10 were needed; under these conditions 48% of the TAN was removed over a 138-day period without any detrimental effects on digester performance. Other effects of the stripping process were an overall reduction in digestate organic nitrogen-containing fraction compared to the control and a recovery in the acetoclastic pathway when TAN concentration was 1770±20 mg kg(-1).

[1]  Rudolf Braun,et al.  Enhancement options for the utilisation of nitrogen rich animal by-products in anaerobic digestion. , 2011, Bioresource technology.

[2]  Yutaka Nakashimada,et al.  Thermophilic two-stage dry anaerobic digestion of model garbage with ammonia stripping. , 2011, Journal of bioscience and bioengineering.

[3]  Awwa,et al.  Standard Methods for the examination of water and wastewater , 1999 .

[4]  B. Ahring,et al.  Thermophilic anaerobic digestion of livestock waste: the effect of ammonia , 2004, Applied Microbiology and Biotechnology.

[5]  H Siegrist,et al.  Anaerobic digestion of slaughterhouse waste with UF-membrane separation and recycling of permeate after free ammonia stripping. , 2005, Water science and technology : a journal of the International Association on Water Pollution Research.

[6]  Sonia Heaven,et al.  Potential errors in the quantitative evaluation of biogas production in anaerobic digestion processes. , 2009, Bioresource technology.

[7]  Irini Angelidaki,et al.  Acetate Oxidation Is the Dominant Methanogenic Pathway from Acetate in the Absence of Methanosaetaceae , 2006, Applied and Environmental Microbiology.

[8]  August Bonmatí,et al.  Air stripping of ammonia from pig slurry: characterisation and feasibility as a pre- or post-treatment to mesophilic anaerobic digestion. , 2003, Waste Management.

[9]  Kwang Victor Lo,et al.  Removal of nitrogen from swine manure wastewaters by ammonia stripping , 1995 .

[10]  Å. Nordberg,et al.  Ammonia, a selective agent for methane production by syntrophic acetate oxidation at mesophilic temperature. , 2008, Water science and technology : a journal of the International Association on Water Pollution Research.

[11]  Lei Zhang,et al.  Ammonia stripping for enhanced biomethanization of piggery wastewater. , 2012, Journal of hazardous materials.

[12]  Masoud Kayhanian,et al.  Ammonia Inhibition in High-Solids Biogasification: An Overview and Practical Solutions , 1999 .

[13]  A. E. Greenberg,et al.  Standard methods for the examination of water and wastewater : supplement to the sixteenth edition , 1988 .

[14]  J. Máca,et al.  Stability and inhibition of anaerobic processes caused by insufficiency or excess of ammonia nitrogen , 2011, Applied Microbiology and Biotechnology.

[15]  J. Liebetrau,et al.  Anaerobic digestion of chicken manure as a single substrate by control of ammonia concentration , 2013 .

[16]  C J Banks,et al.  Anaerobic digestion of catering wastes: effect of micronutrients and retention time. , 2008, Water science and technology : a journal of the International Association on Water Pollution Research.

[17]  Ying Jiang.  Anaerobic digestion of food and vegetable waste , 2012 .

[18]  S. Sung,et al.  Ammonia inhibition on thermophilic aceticlastic methanogens. , 2002, Water science and technology : a journal of the International Association on Water Pollution Research.

[19]  K. S. Creamer,et al.  Inhibition of anaerobic digestion process: a review. , 2008, Bioresource technology.

[20]  N. Nishio,et al.  Ammonia–methane two-stage anaerobic digestion of dehydrated waste-activated sludge , 2008, Applied Microbiology and Biotechnology.

[21]  Sonia Heaven,et al.  Trace element requirements for stable food waste digestion at elevated ammonia concentrations. , 2012, Bioresource technology.

[22]  C. Yirong.  Comparison of mesophilic and thermophilic anaerobic digestion of food waste , 2013 .

[23]  P. N. Sarma,et al.  Biomethanation of poultry litter leachate in UASB reactor coupled with ammonia stripper for enhancement of overall performance. , 2008, Bioresource technology.

[24]  J. C. Converse,et al.  Improved alkalimetric monitoring for anaerobic digestion of high-strength wastes , 1986 .

[25]  R. Rees.  The Fertilizer Encyclopedia , 2011 .