期刊
WASTE MANAGEMENT
卷 137, 期 -, 页码 264-274出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2021.11.023
关键词
Bioponics; Chicken manure; Microbial community; Nutrient; Volatile fatty acid
资金
- Office of the Permanent Secretary, Ministry of Higher Education, Science, Research and Innovation, Thailand [RGNS 63-011]
- College of Tropical Agriculture and Human Resources, University of Hawai'i at Manoa
The study found that adding acetic acid in a bioponic system negatively affected plant yield but did not have a significant impact on nitrogen and phosphorus concentrations. It is recommended to control the acetic acid concentration below 500 mg/L or extend the loading interval to improve the operation of bioponics systems based on chicken manure and digestate.
Bioponics has the potential to recover nutrients from organic waste streams, such as chicken manure and digestate with high volatile fatty acid (VFA) contents through crop production. Acetic acid, a dominant VFA, was supplemented weekly (0, 500, 1000, and 1500 mg/L) in a chicken manure-based bioponic system, and its effect on the performance of bioponics (e.g., plant yield and nitrogen and phosphorus availabilities) was examined. Microbial communities were analyzed using 16S rRNA gene sequencing, and the functional gene abundances were predicted using PICRUSt. Although acetic acid negatively affected plant yield, no significant difference (p > 0.05) was noted in the average nitrogen or phosphorus concentration. In terms of nutrient recovery, the bioponic systems still functioned well, although higher concentrations of acetic acid decreased plant yield and altered the bacterial communities in plant roots and chicken manure sediments. These data suggest that an acetic acid concentration of < 500 mg/L or a longer loading interval is recommended for the effective operation of chicken manure and digestate-based bioponics.
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