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Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (13): 125-128.doi: 10.11924/j.issn.1000-6850.casb15110078

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Analysis and Evaluation of Pollution Factors During Biogas Slurry Storage

秦方锦   

  • Received:2015-11-13 Revised:2015-12-10 Accepted:2015-12-24 Online:2016-05-17 Published:2016-05-17

Abstract: In order to achieve a safe application of biogas slurry to farmland, the change rules of organic matter and heavy metal were studied under different storage time in large-scale pig farm, the indexes were analyzed by the method of single-factor pollution index and comprehensive-factor pollution index. The results showed that total pollutants decreased with the increase of storage time, the main pollution factors included 3 kinds of organic pollutants, 5 kinds of heavy metals did not exceed the standard. When the storage time was over 9 days, the biogas slurry could reach the safety level in comprehensive-factor pollution index evaluation, and water dilution was required in the application of biogas slurry. The evaluation results could provide reference for improving the process of biogas engineering.