Duan Lujuan Cao Jingguo Xiong Fa Yang Zongzheng, . EXPERIMENTAL STUDY OF CHICKEN MANURE FERMENTATION LIQUID TREATMENT BYSTRUVITE PRECIPITATION[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(7): 66-71?.
Citation:
Duan Lujuan Cao Jingguo Xiong Fa Yang Zongzheng, . EXPERIMENTAL STUDY OF CHICKEN MANURE FERMENTATION LIQUID TREATMENT BY
STRUVITE PRECIPITATION[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(7): 66-71?.
Duan Lujuan Cao Jingguo Xiong Fa Yang Zongzheng, . EXPERIMENTAL STUDY OF CHICKEN MANURE FERMENTATION LIQUID TREATMENT BYSTRUVITE PRECIPITATION[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(7): 66-71?.
Citation:
Duan Lujuan Cao Jingguo Xiong Fa Yang Zongzheng, . EXPERIMENTAL STUDY OF CHICKEN MANURE FERMENTATION LIQUID TREATMENT BY
STRUVITE PRECIPITATION[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(7): 66-71?.
Struvite precipitation was adopted to treat the chicken manure fermented liquid from a chicken farm in Beijing．
Single factor experiments and response surface experiments were designed to obtain ammonia removal． Effect of pH，value of n
( Mg2 + ) ∶ n( PO3 －
4
) ∶ n( NH +
4
) ，reaction time and stirring speed on removal ratio of ammonia nitrogen were investigated． The
single factor test results showed that when pH = 10. 0 ～ 10. 5，n( Mg2 + ) ∶ n( PO3 －
4
) ∶ n( NH +
4
) = 1. 3∶ 1. 1∶ 1，reaction time =
20 min and stirring speed = 300 r /min，the removal ratio of ammonia nitrogen reached 75. 79%． The response surface
experiments results showed that when pH = 10. 57，n( Mg2 + ) ∶ n( PO3 －
4
) ∶ n( NH +
4
) = 1. 27 ∶ 1. 12 ∶ 1，the removal ratio of
ammonia nitrogen was up to 75. 81%． The best response surface experiments refined and validated the reaction conditions．
The struvite precipitate under optimal conditions were characterized with SEM and XRD，and it' s main composition is
magnesium ammonium phosphate．
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