|
| The effects of three kinds of drying methods on the chemical properties of fecal anaerobic residues |
| Received:June 29, 2017 |
| View Full Text View/Add Comment Download reader |
| KeyWord:fecal anaerobic residue;vacuum freeze-drying;air-drying;hot air-drying;chemical property |
| Author Name | Affiliation | E-mail | | YANG Hou-hua | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | ZHANG Ke-qiang | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
Dali Experimental Station of Agro-Environmental Science, Ministry of Agriculture, Dali 671004, China | | | YAN Lei | College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | yanlei_74@163.com | | LI Jia-jia | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | WANG Li-na | College of Horticulture Landscape Architecture, Tianjin Agricultural University, Tianjin 300384, China | | | SHEN Shi-zhou | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
Dali Experimental Station of Agro-Environmental Science, Ministry of Agriculture, Dali 671004, China | | | LAI Rui-te | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | WANG Feng | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
Dali Experimental Station of Agro-Environmental Science, Ministry of Agriculture, Dali 671004, China | wangfeng_530@163.com |
|
| Hits: 2254 |
| Download times: 1964 |
| Abstract: |
| This study was used to reveal the effects of different drying methods on the chemical properties of fecal anaerobic residues, which provided the theoretical basis for choosing suitable drying measures. After fecal anaerobic residues were dried by vacuum freeze-drying, air-drying, and hot air-drying, a series of evaluation indices was tested, which included pH value, ammonia nitrogen, total nitrogen, total salinity, total organic carbon (TOC), and dissolved organic carbon (DOC). The results showed that vacuum freeze-drying had the least loss of chemical components of the three methods, which indicated that the vacuum freeze-drying process could maintain high physical and chemical properties. In this study, the effects of different pre-freezing times on the chemical properties of fecal anaerobic residue were also analyzed. There was no significant difference between 3 hours of freeze-drying and 6 hours of freeze-drying in the characterizations of the fecal anaerobic residues. Thus, freeze-drying for 3 hours is suggested as the best pretreatment because of its easy operation and short time. |
|
|
|
