MOE, Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, 730000, Gansu Province, PR China.
MOE, Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, 730000, Gansu Province, PR China.
Environ Pollut. 2021 Jun 1;278:116801. doi: 10.1016/j.envpol.2021.116801. Epub 2021 Feb 22.
Anaerobic digestion, a promising technology for waste utilization and bioenergy generation, is a suitable approach to convert the shrimp waste to biomethane, reducing its environmental impact. In this study, shrimp chaff (SC) was co-digested corn straw (CS), wheat straw (WS), and sugarcane bagasse (SB). In co-digestion, SC enhanced biomethane production of CS by 8.47-fold, followed by SC + WS (5.67-folds), and SC + SB (3.37-folds). SC addition to agricultural biomass digestion also promoted the volatile solids removal up to 85%. Microbial community analysis of SC and CS co-digestion presented the dominance of phylum Bacteroidetes, Firmicutes, Proteobacteria, and Euryarchaeota. Proteolytic bacteria were dominant (18.02%) during co-digestion of SC and CS, with Proteiniphilum as major bacterial genera (14%) that converts complex proteinaceous substrates to organic acids. Among the archaeal community, Methanosarcina responsible for conversion of acetate and hydrogen to biomethane, increased up to 70.77% in SC and CS digestion. Addition of SC to the digestion of agricultural wastes can significantly improve the biomethane production along with its effective management to reduce environmental risks.
厌氧消化是一种有前途的废物利用和生物能源生产技术，是将虾废料转化为生物甲烷的合适方法，可以降低其环境影响。在本研究中，虾壳（SC）与玉米秸秆（CS）、小麦秸秆（WS）和甘蔗渣（SB）共消化。在共消化中，SC 使 CS 的生物甲烷产量提高了 8.47 倍，其次是 SC+WS（5.67 倍）和 SC+SB（3.37 倍）。SC 对农业生物质消化的添加也促进了挥发性固体的去除，最高可达 85%。SC 和 CS 共消化的微生物群落分析表明，门细菌、厚壁菌门、变形菌门和广古菌门占优势。在 SC 和 CS 的共消化过程中，蛋白酶菌占主导地位（18.02%），其中蛋白菌是主要的细菌属（14%），可将复杂的蛋白质基质转化为有机酸。在古菌群落中，负责将乙酸和氢气转化为生物甲烷的产甲烷菌在 SC 和 CS 消化中增加了 70.77%。将 SC 添加到农业废物的消化中可以显著提高生物甲烷的产量，并有效管理以降低环境风险。
