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2020 Vol.65, Issue 4 Preview Page
Changes in Chemical Properties and Effect on Germination of Radish Seed from Aeration of Co-digestate Fertilizers

통합 혐기소화액별 폭기처리에 따른 화학적 성분 변화와 무의 발아효과

Ji-Eun Byeon1
,
Hong-Ju Lee2
,
Jong-Won Ryoo3
,
Sun-Goo Hwang3*
변 지은1
,
이 홍주2
,
류 종원3
,
황 선구3*
1Ph.D. Student, College of Life and Environment Science, Sangji University
2M.S. Student, College of Life and Environment Science, Sangji University
3Professor, College of Life and Environment Science, Sangji University
1상지대학교 생명환경과학대학 박사과정
2상지대학교 생명환경과학대학 석사과정
3상지대학교 생명환경과학대학 교수
*Corresponding Author
1 December 2020. pp. 508-517
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Abstract

This study aimed to determine the minimum period of aeration treatment of co-digestate to develop it as liquid fertilizer and the chemical changes that occur in the aerobic liquefying process. The co-digestates were divided into three types depending on their additives: swine slurry anaerobic digestate (SS AD), swine slurry 70% + cow slurry 30% anaerobic digestate (SS + CS AD), and swine slurry 70% + apple pomace 30% anaerobic digestate (SS + AP AD). The pH of all co-digestates increased rapidly after 3 days of aerobic treatment, but had slightly decreased in SS AD after 9 days and in SS + CS AD and SS + AP AD after 15 days. All co-digestates showed a strongly reduced pH between 27 and 36 days of aeration treatment. SS AD had lower pH value, dissolved oxygen (DO), NH4-N, and NO3-N content under aerobic conditions than other co-digestates. To assess the fully decomposed liquid fertilizer, a germination test was performed on the undiluted and diluted co-digestate using the liquid fertilizer germination index (LFGI) method. The relative germination ratio, relative root elongation, and germination index of SS AD were higher than those of the others. When the LFGI method was used for the germination test, all co-digestates showed an appropriate germination index of 70 after 60 days of aeration treatment. Thus, we suggest that the minimum period of aeration treatment for co-digestates might be 60 days to develop the fully decomposed liquid fertilizer.

Keywords
aeration
chemical component
co-digestate
germination index
liquid fertilizer
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 65
  • No :4
  • Pages :508-517
  • Received Date : 2020-06-05
  • Revised Date : 2020-09-21
  • Accepted Date : 2020-10-06
  • DOI :https://doi.org/10.7740/kjcs.2020.65.4.508
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