Aug 2026· International Journal of Agriculture and Natural Resources· Vol 53, pp. 74-94· 0 citations
Abstract
Food waste wastewater (FWW), defined in this study as the aqueous supernatant obtained after hydrothermal treatment and solid–liquid separation of food waste, is rich in soluble organic matter and nutrients and has considerable potential as a low-cost substrate for microbial cultivation. This study investigated the feasibility of using FWW to produce a liquid nitrogen-fixing bacterial (NFB) fertilizer. Five NFB strains were isolated from wheat rhizosphere soil, among which strain N4, identified as Arthrobacter pascens, exhibited the highest nitrogen-fixation capacity and was selected for fertilizer preparation. FWW produced at 120 °C provided the most suitable culture medium. Under the optimized conditions (100 rpm, 25 °C, pH 6, and 1% inoculum), the total bacterial count reached 1.38 × 1013 CFU mL-1. In a 35-day soybean seedling pot experiment, application of the FWW-derived NFB fertilizer increased the fresh weight of soybean plants by 73.6% compared with the CK treatment and was accompanied by increased soil available nitrogen and enzyme activities. The treatment was also associated with shifts in rhizosphere bacterial community composition.
Overall, this study establishes a scalable platform that integrates SPW valorization, low-cost BC production, and sandy soil restoration, providing a promising route for coupling industrial wastewater management with sustainable land amelioration.
Hao-Long Zheng, Yi Wang, Xue-Qing Zhao et al.· Bioresource Technology· 0 citations
Gliricidia sepium biomass is a locally available nitrogen-rich resource for organic systems, but processing may alter nutrient composition, composting dynamics, and pellet mechanical resistance. This study produced eight Green-N formulations from leaves and/or stems using drying and pelletization, aerobic composting fo...
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Climate change is steadily eroding agricultural productivity through soil degradation, water and salinity stress, and declining nutrient-use efficiency, while the heavy reliance on conventional mineral fertilizers contributes to greenhouse-gas emissions, nutrient losses, and, in some contexts, reduced soil biological...
T. Thennakoon, M. Awanthi, Nuwandhya S. Dissanayaka et al.· Frontiers in Sustainable Foo...· 0 citations
This study optimized fermentation process of grain milling waste (wheat bran, wheat flour and mill dust) using
Lactiplantibacillus plantarum
(LP) or
Bacillus subtilis
(BS). The experiment included two parts: (I)
in vitro
optimization and evaluation of the fermentation of mill waste in two inoculum levels and th...
Sylvie Skalickova, J. Antošovský, Andrea Ridošková et al.· Frontiers in Sustainability· 0 citations
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