Scholarlink

As the contradiction between the gradual acceleration of agricultural production and the increasing environmental pollution becomes more and more intense, the resource utilization of agricultural waste has become one of the key ways to break the ecological constraints. To tackle the dual challenges of disposal difficulties in consuming the feces slurry produced by large-scale pig raising and the low utilization rate of the straw resources produced by corn planting, this study constructed an innovative process system for the synergistic treatment of corn straw and pig feces slurry and the resource utilization of biogas slurry. The corn straw was pretreated, added to pig feces slurry, and sent to anaerobic fermentation tanks for joint anaerobic fermentation, and the biogas slurry produced from fermentation was treated by hydrolytic acidification and A2O process, which can effectively decrease its nutrient content to enable limited surrounding farmland to assimilate more slurry. Meanwhile, the slurry maintains fertilizer efficacy. The effluent nitrogen and phosphorus concentrations in this design are determined through computational analysis of government-recommended fertilization guidelines, eliminating the need for subsequent fertilization. Economic analysis demonstrates that the treatment cost of biogas slurry in this system is 50% lower than local wastewater treatment cost standards, demonstrating promising economic benefits. This design not only effectively utilizes resources but also reduces the risk of environmental pollution, provides a “zero chemical fertilizer input” circular agricultural model for integrated crop-livestock regions, holding significant practical value for promoting green agricultural development.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Engineering Design of Biogas Production from Straw Combined with Pig Feces and Waste Water, and Biogas Slurry Returning to the Field After Burden Reduction Treatment

  • 会议论文

  • 发表日期：

    2025年

查看全文
  • Jinyan Lv,
  • Xiangjin Ran

摘要

As the contradiction between the gradual acceleration of agricultural production and the increasing environmental pollution becomes more and more intense, the resource utilization of agricultural waste has become one of the key ways to break the ecological constraints. To tackle the dual challenges of disposal difficulties in consuming the feces slurry produced by large-scale pig raising and the low utilization rate of the straw resources produced by corn planting, this study constructed an innovative process system for the synergistic treatment of corn straw and pig feces slurry and the resource utilization of biogas slurry. The corn straw was pretreated, added to pig feces slurry, and sent to anaerobic fermentation tanks for joint anaerobic fermentation, and the biogas slurry produced from fermentation was treated by hydrolytic acidification and A2O process, which can effectively decrease its nutrient content to enable limited surrounding farmland to assimilate more slurry. Meanwhile, the slurry maintains fertilizer efficacy. The effluent nitrogen and phosphorus concentrations in this design are determined through computational analysis of government-recommended fertilization guidelines, eliminating the need for subsequent fertilization. Economic analysis demonstrates that the treatment cost of biogas slurry in this system is 50% lower than local wastewater treatment cost standards, demonstrating promising economic benefits. This design not only effectively utilizes resources but also reduces the risk of environmental pollution, provides a “zero chemical fertilizer input” circular agricultural model for integrated crop-livestock regions, holding significant practical value for promoting green agricultural development.