Pubblicazione scientifica

Toxicity Evaluation of Pig Slurry Using Luminescent Bacteria and Zebrafish

FILONE TECNOLOGICO	TEMA
produzione e raccolta

RIASSUNTO

Biogas slurry has become a serious pollution problem and anaerobic digestion is widely applied to pig manure treatment for environmental protection and energy recovery. To evaluate environmental risk of the emission of biogas slurry, luminescent bacteria (Vibrio fischeri), larvae and embryos of zebrafish (Danio rerio) were used to detect the acute and development toxicity of digested and post-treated slurry. Then the ability of treatment process was evaluated. The results showed that digested slurry displayed strong toxicity to both zebrafish and luminescent bacteria, while the EC50 for luminescent bacteria and the LC50 for larvae were only 6.81% (v/v) and 1.95% (v/v) respectively, and embryonic development was inhibited at just 1% (v/v). Slurry still maintained a high level of toxicity although it had been treated by membrane bioreactor (MBR), while the LC50 of larvae was 75.23% (v/v) and there was a little effect on the development of embryos and V. fischeri; the results also revealed that the zebrafish larvae are more sensitive than embryos and luminescent bacteria to pig slurry. Finally, we also found the toxicity removal rate was higher than 90% after the treatment of MBR according to toxicity tests. In conclusion, further treatment should be used in pig slurry disposal or reused of final effluent.

DATA

Data di pubblicazione: 01/07/2014

AUTORI

CHEN WENYAN
CAI QIANG
ZHAO YUAN
ZHENG GUOJUAN
LIANG YUTING

ENTE DI AFFERENZA

SCHOOL OF ENVIRONMENTAL & SAFETY ENG CHANGZHOU UNIV
YANGTZE DELTA REGION INST TSINGHUA UNIV
WATER SCIENCE & TECH LAB
INST SOIL SCIENCE CHINESE ACAD SCIENCE

RIVISTA

International Journal of Environmental Research and Public Health, 11(7), 6856-6870

IMPACT FACTOR

2,620

indietro