Emission characteristics of ammonia, hydrogen sulfide and odor concentrations in step cage-rearing layer farms

doi:10.16178/j.issn.0528-9017.20230700

Abstract

Abstract:

It is of profound significance to carry out research on the emission characteristics of ammonia and hydrogen sulfide in typical large-scale layer farms to improve the air quality of chicken houses, reduce pollution from poultry breeding, and control harmful gas emissions. In this paper, the concentration of ammonia, hydrogen sulfide and odor inside and outside the chicken house in winter, spring and summer of a step cage-rearing layer farm in Zhejiang Province was detected and analyzed, and the ammonia emission rate of each laying hen was calculated. The results showed that the average concentration of NH₃ in different seasons was significantly different, the highest was in winter (14.46 mg·m^-3), H₂S gas was detected only in winter in the chicken house, and the change law of NH₃ and H₂S in different positions in the chicken house was different in different seasons, and the NH₃ concentration near the entrance and exhaust outlet in winter and summer was easily affected by the air flow, and the NH₃ and H₂S concentrations detected in the central area of the chicken house were more representative of the odor emission in the chicken house. Among the points outside the house, the NH₃ concentration was the highest in summer except for the NH₃ concentration at the air outlet of the chicken house, which was the highest in winter. The ammonia emission rates of chicken house in winter and summer were 3.09 and 18.87 mg·h^-1 per chicken, the ammonia emission rate of the chicken house in summer was significantly greater than that in winter; The correlation analysis between NH₃ and odor concentration showed that the Pearson correlation coefficient was 0.41, and the correlation between the two was poor.

Key words: layer, ammonia, hydrogen sulfide, odor concentration, ammonia emission rate, emission rules

CLC Number:

S815.9

DING Lin, YU Weixiang, TAN Chunmei, YING Yongfei. Emission characteristics of ammonia, hydrogen sulfide and odor concentrations in step cage-rearing layer farms[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(9): 2198-2205.

Figures/Tables 8

References 33

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季节	温度/℃		相对湿度/%		风速/(m·s^-1)		通风模式
季节	舍外	舍内	舍外	舍内	舍外	舍内	通风模式
冬	19.4±2.5 b	26.3±0.8 b	54.4±0.6	52.9±1.7 c	2.5±0.7 b	1.1±0.1 b	2个风机
春	15.6±2.0 c	20.7±1.1 c	56.2±3.0	66.5±2.0 b	1.8±0.2 c	0.3±0.1 c	椽口
夏	32.0±1.0 a	29.3±0.6 a	56.2±3.0	80.8±1.6 a	3.0±0.4 a	2.8±0.3 a	5个风机+湿帘降温

季节	温度/℃		相对湿度/%		风速/(m·s^-1)		通风模式
季节	舍外	舍内	舍外	舍内	舍外	舍内	通风模式
冬	19.4±2.5 b	26.3±0.8 b	54.4±0.6	52.9±1.7 c	2.5±0.7 b	1.1±0.1 b	2个风机
春	15.6±2.0 c	20.7±1.1 c	56.2±3.0	66.5±2.0 b	1.8±0.2 c	0.3±0.1 c	椽口
夏	32.0±1.0 a	29.3±0.6 a	56.2±3.0	80.8±1.6 a	3.0±0.4 a	2.8±0.3 a	5个风机+湿帘降温

季节	舍内NH₃浓度/(mg·m^-3)		鸡舍出风口NH₃浓度/ (mg·m^-3)	鸡粪处理区NH₃浓度/ (mg·m^-3)	场界NH₃浓度/(mg·m^-3)		栏舍氨排放速率/ mg·h^-1·只^-1
季节	平均值	范围	鸡舍出风口NH₃浓度/ (mg·m^-3)	鸡粪处理区NH₃浓度/ (mg·m^-3)	平均值	范围	栏舍氨排放速率/ mg·h^-1·只^-1
冬	14.46±2.21 a	10.41~16.48	3.66±0.82 a	1.09±0.37 b	0.05±0.03 b	0.02~0.09	3.09
春	0.57±0.47 b	0.08~1.46	0.68±0.01 b	0.65±0.03 b	0.05±0.01 b	0.03~0.05	—
夏	0.12±0.04 c	0.08~0.17	1.93±0.45 a	2.42±0.52 a	0.14±0.19 a	0.01~0.46	18.87

季节	舍内NH₃浓度/(mg·m^-3)		鸡舍出风口NH₃浓度/ (mg·m^-3)	鸡粪处理区NH₃浓度/ (mg·m^-3)	场界NH₃浓度/(mg·m^-3)		栏舍氨排放速率/ mg·h^-1·只^-1
季节	平均值	范围	鸡舍出风口NH₃浓度/ (mg·m^-3)	鸡粪处理区NH₃浓度/ (mg·m^-3)	平均值	范围	栏舍氨排放速率/ mg·h^-1·只^-1
冬	14.46±2.21 a	10.41~16.48	3.66±0.82 a	1.09±0.37 b	0.05±0.03 b	0.02~0.09	3.09
春	0.57±0.47 b	0.08~1.46	0.68±0.01 b	0.65±0.03 b	0.05±0.01 b	0.03~0.05	—
夏	0.12±0.04 c	0.08~0.17	1.93±0.45 a	2.42±0.52 a	0.14±0.19 a	0.01~0.46	18.87

环境参数	温度	相对湿度	风速
相对湿度	0.357 2
风速	0.929 5	0.676 5
氨气浓度	-0.144 6	-0.872 5	-0.230 4