Effect of pH adjustment on the liquefaction process of anaerobic digestate and seed germination

Ji-Eun Byeon; Hong-Ju Lee; Jong-Won Ryoo; Sun-Goo Hwang

doi:10.11109/JAES.2021.23.1.007

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2021 Vol.23, Issue 1 Preview Page Next Page

Research article

Effect of pH adjustment on the liquefaction process of anaerobic digestate and seed germination 혐기소화액의 pH 조절이 액비화 과정 및 종자 발아에 미치는 영향

30 April 2021. pp. 7-13

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Abstract

This study aimed to survey the chemical change and germination effect of anaerobic digestate after pH adjustment and aerobic treatment. The amount of ammonia (NH₃) in swine slurry anaerobic digestates (SS AD) of pH 7.0 and pH 6.5 were lower than that of un-adjusted anaerobic digestate. Especially, the anaerobic digestate with pH 6.5 had the lowest NH₃ generation. The amount of NH₄-N has been gradually decreasing in the untreated anaerobic digestate, however, the anaerobic digestates with pH 7.0 and pH 6.5 showed no significant changes. In the germination tests with different methods, the germination index (GI) of anaerobic digestates with pH 7.0 and pH 6.5 was higher than that of un-adjusted anaerobic digestate. Thus, the pH adjustment will be useful to decrease the gas generation such as NH₃, which causes the odor generated from anaerobic digestate.

Keywords

Swine slurry

pH adjustment

Germination effect

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Information

Publisher :The Korean Society of Animal Environmental Science & Technology
Publisher(Ko) :(사)한국축산환경학회
Journal Title :Journal of Animal Environmental Science
Journal Title(Ko) :축산시설환경학회지
Volume : 23
No :1
Pages :7-13
Received Date : 2021-03-03
Revised Date : 2021-04-04
Accepted Date : 2021-04-08
DOI :https://doi.org/10.11109/JAES.2021.23.1.007

Journal of Animal Environmental ScienceISSN:1226-0274(Print)(사)한국축산환경학회

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