{"title":"Effect of low-dose acidification of slurry digestate on ammonia emissions after field application (Short Communication)","authors":"Johanna Pedersen , Tavs Nyord","doi":"10.1016/j.aeaoa.2023.100205","DOIUrl":null,"url":null,"abstract":"<div><p>Field application of digestate from liquid animal manure (slurry) poses an environmental risk due to emission of ammonia (NH<sub>3</sub>). Various application techniques can reduce NH<sub>3</sub> losses. Three experiments were conducted in Denmark where NH<sub>3</sub> emission after field application of anaerobically digested separated cattle slurry was measured using dynamic flux chambers with online measurements. The results showed that acidifying the digestate at a low level equal to the crop sulphur requirement reduced the average NH<sub>3</sub> emission by 13% compared to non-acidified trailing shoe application of digestate. Disc injection reduced average emissions even more by 38% compared to trailing shoe application. There was a large variation in mitigation effect between experiments.</p></div>","PeriodicalId":37150,"journal":{"name":"Atmospheric Environment: X","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atmospheric Environment: X","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2590162123000059","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 1
Abstract
Field application of digestate from liquid animal manure (slurry) poses an environmental risk due to emission of ammonia (NH3). Various application techniques can reduce NH3 losses. Three experiments were conducted in Denmark where NH3 emission after field application of anaerobically digested separated cattle slurry was measured using dynamic flux chambers with online measurements. The results showed that acidifying the digestate at a low level equal to the crop sulphur requirement reduced the average NH3 emission by 13% compared to non-acidified trailing shoe application of digestate. Disc injection reduced average emissions even more by 38% compared to trailing shoe application. There was a large variation in mitigation effect between experiments.
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