Agricultural Residue Utilization for Development of Biofertilizers

A special issue of Agronomy (ISSN 2073-4395). This special issue belongs to the section "Soil and Plant Nutrition".

Deadline for manuscript submissions: 1 January 2027 | Viewed by 1269

Editors

College of Life Sciences, Zhejiang University, Hangzhou 310027, China
Interests: co-remediation of soil and water; phycoremediation; phytoremediation; plant-microalgae co-culture; plant-algae interaction
Special Issues, Collections and Topics in MDPI journals
Institute of Environment, Resource, Soil & Fertilizer, Zhejiang Academy of Agriculture Sciences, Hangzhou 310021, China
Interests: agricultural waste treatment; antimicrobial resistance; emerging organic contaminants; biodegradation and bioremediation; biogeochemical cycling and microbial processes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Agricultural residues, such as crop straw, livestock manure, and other organic by-products, are generated in enormous quantities worldwide. Their effective utilization is essential not only for reducing environmental burdens associated with waste accumulation and improper disposal, but also for promoting nutrient recycling, improving soil fertility, and advancing circular agriculture. Among the available valorization pathways, the conversion of agricultural residues into biofertilizers has attracted increasing attention as a sustainable strategy for transforming waste into value-added agricultural inputs. However, major challenges remain in optimizing biological conversion processes, understanding microbial transformation mechanisms, ensuring product quality and stability, and evaluating agronomic performance under diverse field conditions. In addition, emerging technologies such as artificial intelligence, machine learning, and IoT-based monitoring offer new opportunities to improve process control, predict transformation outcomes, and support smart production systems. This Special Issue aims to highlight recent advances in the utilization and biotransformation of agricultural residues for biofertilizer development, spanning microbial processes, product innovation, digital technologies, and sustainable agricultural applications.

Topics of interest include, but are not limited to:

  • Biotransformation technologies for agricultural residues into biofertilizers
  • Functional biofertilizers, biostimulants, and related product development
  • Beneficial microorganisms for soil improvement and nutrient cycling
  • Field application and environmental assessment of residue-derived biofertilizers
  • AI- and machine learning-assisted optimization of residue biotransformation
  • IoT-based monitoring and smart management in biofertilizer production systems

Dr. Qifa Zhou
Dr. Hui Lin
Guest Editors

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Keywords

  • agricultural residues
  • biofertilizer
  • soil health
  • sustainable agriculture
  • artificial intelligence

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Published Papers (1 paper)

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Research

19 pages, 3049 KB  
Article
Ethanol Addition Significantly Improves Algal Biofertilizer Quality and Enhances Suitability of Wastewater for Irrigation in Treating Swine Wastewater with Dictyosphaerium sp.
by Xiaoyan Zhang, Mengjie Zhang, Hui Lin, Huabao Zheng and Qifa Zhou
Agronomy 2026, 16(9), 941; https://doi.org/10.3390/agronomy16090941 - 6 May 2026
Viewed by 475
Abstract
Microalgae-based wastewater treatment can support sustainable crop production. This study evaluated whether ethanol supplementation improves swine wastewater (SW) treatment by Dictyosphaerium sp. and enhances algal biofertilizer production. Across the ethanol levels tested, 500 mg/L ethanol significantly promoted algal growth and enhanced liquid-phase net [...] Read more.
Microalgae-based wastewater treatment can support sustainable crop production. This study evaluated whether ethanol supplementation improves swine wastewater (SW) treatment by Dictyosphaerium sp. and enhances algal biofertilizer production. Across the ethanol levels tested, 500 mg/L ethanol significantly promoted algal growth and enhanced liquid-phase net removal of total salts, carbonate/bicarbonate, ammonium, phosphate, and calcium. Ethanol supplementation also reduced apparent nitrogen loss, and no residual ethanol was detected at the end of the culture. In the biofertilizer production experiment, peak algal biomass, algal nitrogen, and algal phosphorus increased by 320.0–407.4%, 122.7–158.1%, and 100.0–170.0%, respectively. Metatranscriptomic analysis showed active transcription of adh, aldh/aldB, and acs in Dictyosphaerium sp. and some bacterial taxa, mainly Flavobacterium, Chryseobacterium, Comamonas, and Brevundimonas. Community and transcriptomic results indicate enhanced photosynthetic activity and taxon-specific N- and P-related transcriptional responses, consistent with altered nitrate/nitrite transformation potential and increased nitrogen retention in the algal–bacterial system. Under the tested conditions, ethanol supplementation shows promise for SW treatment and algal biofertilizer production. Full article
(This article belongs to the Special Issue Agricultural Residue Utilization for Development of Biofertilizers)
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