苕溪流域生猪养殖产污特征

doi:10.11934/j.issn.1673-4831.2017.10.011

Abstract

Abstract:

Livestock and poultry breeding farms different in scale vary in management mode, and in pollution generation characteristic, too. Studying their pollution generation characteristics relative to scale of the farm may help provide some scientific basis for rational regional waste utilization and pollution control. Two pig farms different in scale in Tiaoxi Basin were selected for the study, samples of wastewater and pig feces generated in these two pig farms were collected for analysis to characterize, pollutant contents in the wastewater and feces and pollution generation coefficient of the farms different in scale at different stages. Results show that the Jinai Farm (annually 500 pigs sent to the slaughterhouse) was higher than in the Daguanshan Farm (annually 36 000 pigs sent the slaughterhouse) in average daily production of breeding sewage and feces per pig; the Daguanshan Farm was higher than the Jinai Farm in pollution content (except for P) in the sewage and feces; the Jianai Farm was much too higher than the Daguanshan Farm in content of total phosphorus(TP) in the pig waste, which might result from the use of swill as feed, which was higher in TP. Pollution generation coefficient varied with pig breeding stage. In the Daguanshan Farm, generation coefficient reached 8.94, 18.68 and 30.65 g·d^-1 for TN and 3.91, 7.62 and 14.77 g·d^-1 for TP, respectively, at the stage of nursery, fattening and gestation in the Daguanshan Farm, and 9.84, 19.77 and 32.95 g·d^-1 for TN, and 5.87, 15.23 and 30.09 g·d^-1 for TP, respectively, at the Jinai Farm. Apparently, the Daguanshan Farm was slightly higher than the Jinai Farm in total nitrogen (TN) pollutant generation, but much lower in TP pollutant generation coefficient and the two farms were quite similar in heavy metal pollutants generation coefficient, which demonstrate that scale of a pig farm is a major factor affecting TP pollutant generation coefficient, but a minor one affecting TN and heavy metal pollutant generation coefficients.

Key words: pig breeding, Tiaoxi Basin, pollutant generation coefficient

CLC Number:

X502
X830.7

CHEN Yu-dong, ZHOU Hui-ping, ZHUANG Li, SU Liang-hu, SUN Xu, LIANG Kang-kang, ZHANG Long-jiang. Pollution Production Coefficient of Pig Farms Typical of Tiaoxi Basin[J]. Journal of Ecology and Rural Environment, 2017, 33(10): 943-949.

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Pollution Production Coefficient of Pig Farms Typical of Tiaoxi Basin

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