Simultaneous removal of ammonia, P and COD from anaerobically digested piggery wastewater using an integrated process of chemical precipitation and air stripping.

The paper presented an efficient integrated physicochemical process, which consists of chemical precipitation and air stripping, for the simultaneous removal of NH(3)-N, total P and COD from anaerobically digested piggery wastewater. In the integrated process, Ca(OH) (2) was used as the precipitant for NH(4)(+), PO(4)(3-) and organic phosphorous compounds, and as the pH adjuster for the air stripping of residual ammonia. The possibility of the suggested process and the related mechanisms were first investigated through a series of equilibrium tests. Laboratory scale tests were carried out to validate the application possibility of the integrated process using a new-patented water sparged aerocyclone reactor (WSA). The WSA could be effectively used for the simultaneous removal of NH(3)-N, total P and COD. 3g/L of Ca(OH) (2) is a proper dosage for the simultaneous removal. The simultaneous removal of NH(3)-N, total P and COD in the WSA reactor could be easily optimized by selecting a proper air inlet velocity and a proper jet velocity of the liquid phase. In all the cases, the removal efficiencies of the NH(3)-N, total P and COD were over 91%, 99.2% and 52% for NH(3)-N, total P and COD, respectively. The formed precipitates in the process could be easily settled down from the suspension system. Therefore, the integrated process provided an efficient alternative for the simultaneous removal of NH(3)-N, total P and COD from the wastewater.

[1]  M. F. Colmenarejo,et al.  Piggery waste treatment by using down-flow anaerobic fixed bed reactors , 2007, Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes.

[2]  C. W. Lee,et al.  Removal of nitrogen and phosphate from wastewater by addition of bittern. , 2003, Chemosphere.

[3]  Qinghu Zhao,et al.  Air stripping of ammonia in a water-sparged aerocyclone reactor. , 2009, Journal of hazardous materials.

[4]  S. Nikolaeva,et al.  Treatment of piggery waste by anaerobic fixed bed reactor and zeolite bed filter in a tropical climate: a pilot scale study , 2002 .

[5]  A. Aivasidis,et al.  A modified UCT method for biological nutrient removal: configuration and performance. , 2008, Chemosphere.

[6]  M F Colmenarejo,et al.  Effect of organic loading rate on the stability, operational parameters and performance of a secondary upflow anaerobic sludge bed reactor treating piggery waste. , 2005, Bioresource technology.

[7]  Sun-Jin Hwang,et al.  Optimum doses of Mg and P salts for precipitating ammonia into struvite crystals in aerobic composting. , 2005, Bioresource technology.

[8]  Göksel N. Demirer,et al.  Ammonia removal from anaerobically digested dairy manure by struvite precipitation , 2005 .

[9]  Derin Orhon,et al.  The fate of phosphate under anoxic conditions in biological nutrient removal activated sludge systems , 1998, Biotechnology Letters.

[10]  G. Saracco,et al.  High temperature ammonia stripping and recovery from process liquid wastes , 1994 .

[11]  Jesse Zhu,et al.  Simultaneous carbon, nitrogen and phosphorous removal from municipal wastewater in a circulating fluidized bed bioreactor. , 2006, Chemosphere.

[12]  K. Jönsson,et al.  Anoxic biological phosphorus removal in a full-scale UCT process , 1997 .

[13]  Ilhan Talinli,et al.  Recovery of Ammonia from Human Urine by Stripping and Absorption , 2007 .

[14]  Mogens Henze,et al.  Biological phosphorus uptake under anoxic and aerobic conditions , 1993 .

[15]  J. Rintala,et al.  Screening of physical-chemical methods for removal of organic material, nitrogen and toxicity from low strength landfill leachates. , 2002, Chemosphere.

[16]  S. Montalvo.  Treatment of swine wastes by a high-rate-modified-anaerobic-process (HRAMP) , 1995 .

[17]  Bulent Mertoglu,et al.  Landfill leachate management in Istanbul: applications and alternatives. , 2005, Chemosphere.

[18]  Izzet Ozturk,et al.  Advanced physico-chemical treatment experiences on young municipal landfill leachates. , 2003, Waste management.

[19]  Lin-cheng Zhou,et al.  Industrial Wastewater Treatment by the Combination of Chemical Precipitation and Immobilized Microorganism Technologies , 2007 .

[20]  M. Wentzel,et al.  Modelling multiple mineral precipitation in anaerobic digester liquor. , 2003, Water research.

[21]  A. Bódalo,et al.  Ammonium removal from aqueous solutions by reverse osmosis using cellulose acetate membranes , 2005 .

[22]  A. Aivasidis,et al.  An activated sludge treatment plant for integrated removal of carbon, nitrogen and phosphorus , 2007 .

[23]  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.

[24]  Antonio M. Martin,et al.  Effect of substrate concentration and temperature on the anaerobic digestion of piggery waste in a tropical climate , 2001 .