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Valorization of fruit and vegetable waste for biofertilizer and biogas
Journal of Food Process Engineering ( IF 2.7 ) Pub Date : 2020-09-06 , DOI: 10.1111/jfpe.13512 Ipsita Chakravarty 1 , Sachin A. Mandavgane 1
Journal of Food Process Engineering ( IF 2.7 ) Pub Date : 2020-09-06 , DOI: 10.1111/jfpe.13512 Ipsita Chakravarty 1 , Sachin A. Mandavgane 1
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The ubiquity of irrational disposal practices for fruit and vegetable waste (FVW) poses prohibitive environmental and economic liability. Anaerobic digestion of fruit and vegetable residues into biofertilizer is a potential solution to reduce environmental pollution and improve soil nutrition. High carbon and low nitrogen content is the main challenge in the bioprocessing of FVWs. In such cases, FVWs is co‐digested with another eco‐waste, the slaughterhouse wastewater (SWW). The issues of abattoir waste disposal are a serious threat to the societal health and hygiene. Interestingly, SWW is a house of mixed microorganisms which release enzymes for anaerobic digestion. In our present study, a two‐stage digestion process, that is, anaerobic digestion followed aerobic digestion using Trichoderma reesei is carried out under optimized conditions for enhanced biofertilizer formation. Each stage was completed in 15 days, total digestion time being 1 month. Biogas generated during the anaerobic process is 16 L/kg for fruit wastes (FWs) and 13.2 L/kg for vegetable wastes (VWs). Significant decrease in lignin up to 64% in case of FWs and 70% in case of VWs helped in cellulose degradation. The FVWs are finally reduced to a potential value‐added biofertilizer with 10–11 C: N ratio.
中文翻译：
为生物肥料和沼气增值的果蔬废料
水果和蔬菜废物（FVW）的不合理处置做法普遍存在，给环境和经济造成了极大的责任。厌氧消化水果和蔬菜残留物进入生物肥料是减少环境污染和改善土壤营养的潜在解决方案。高碳含量和低氮含量是FVWs生物加工的主要挑战。在这种情况下，FVW与另一种生态废物即屠宰场废水（SWW）一起被消化。屠宰场废物处理问题严重威胁着社会健康和卫生。有趣的是，SWW是一个混合微生物的房子，它们会释放酶进行厌氧消化。在我们目前的研究中，消化过程分为两个阶段，即使用里氏木霉进行厌氧消化和有氧消化在优化的条件下进行，以增强生物肥料的形成。每个阶段在15天内完成，总消化时间为1个月。厌氧过程中产生的沼气对水果废物（FW）为16 L / kg，对蔬菜废物（VW）为13.2 L / kg。木质素的显着降低（对于FW而言）和70％（对于VW）有助于纤维素降解。FVWs最终被减少为具有10-11 C：N比的潜在增值生物肥料。
更新日期：2020-09-06
中文翻译：
为生物肥料和沼气增值的果蔬废料
水果和蔬菜废物（FVW）的不合理处置做法普遍存在，给环境和经济造成了极大的责任。厌氧消化水果和蔬菜残留物进入生物肥料是减少环境污染和改善土壤营养的潜在解决方案。高碳含量和低氮含量是FVWs生物加工的主要挑战。在这种情况下，FVW与另一种生态废物即屠宰场废水（SWW）一起被消化。屠宰场废物处理问题严重威胁着社会健康和卫生。有趣的是，SWW是一个混合微生物的房子，它们会释放酶进行厌氧消化。在我们目前的研究中，消化过程分为两个阶段，即使用里氏木霉进行厌氧消化和有氧消化在优化的条件下进行，以增强生物肥料的形成。每个阶段在15天内完成，总消化时间为1个月。厌氧过程中产生的沼气对水果废物（FW）为16 L / kg，对蔬菜废物（VW）为13.2 L / kg。木质素的显着降低（对于FW而言）和70％（对于VW）有助于纤维素降解。FVWs最终被减少为具有10-11 C：N比的潜在增值生物肥料。
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