Evaluating the effectiveness of HOCl application on odor reduction and earthworm population growth during vermicomposting of food waste employing Eisenia fetida


Autoři: Chanwoo Kim aff001;  Younggu Her aff002;  Yooan Kim aff001;  Chanhoon Jung aff003;  Hangkyo Lim aff004;  Kyo Suh aff001
Působiště autorů: Graduate School of International Agricultural Technology, Seoul National University, Pyeonchang-gun, Gangwon, Republic of Korea aff001;  Department of Agricultural and Biological Engineering, Tropical Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Homestead, Florida, United States of America aff002;  Interdisciplinary Program in Agricultural and Forest Meteorology, Seoul National University, Seoul, Republic of Korea aff003;  Department of Biology, Notre Dame of Maryland University, Baltimore, Maryland, United States of America aff004;  Institute of Green Bio Science & Technology, Seoul National University, Gangwon, Republic of Korea aff005
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: 10.1371/journal.pone.0226229

Souhrn

Vermicomposting has been recommended as an eco-friendly method to transform organic waste into nutrient resources with minimum energy input. However, odor and pest issues associated with this method limit the use of vermicomposting, especially in indoor conditions. This study evaluated the effectiveness of applying hypochlorous acid (HOCl) to deodorize the vermicomposting process and improve the breeding environment for earthworms (Eisenia fetida). The deodorization performance of HOCl was compared by measuring the amount of ammonia (NH3) and amine (R-NH2) released from the decaying process of two types of food waste: HOCl-treated (HTW) waste and non-treated waste (NTW). The total and individual weights of earthworms in the waste treated with HOCl was measured to evaluate the impact on earthworm reproduction after applying HOCl. The results showed that HOCl application could reduce NH3 by 40% and R-NH2 by 80%, and increase the earthworm population size and total weight by up to 29% and 92%, respectively, compared to the control group. These results suggest that HOCl application is potentially an efficient method to control the odor and to boost earthworm reproduction and thus facilitate vermicomposting for improved food waste treatment and environmental quality.

Klíčová slova:

Amines – Ammonia – Earthworms – Gases – Gut bacteria – Organic materials – Population growth – Population size


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Článek vyšel v časopise

PLOS One


2019 Číslo 12