Wedwitschka Harald, Gallegos Ibanez Daniela, Schäfer Franziska, Jenson Earl, Nelles Michael
Department Biochemical Conversion, DBFZ Deutsches Biomasseforschungszentrum gemeinnützige GmbH, Torgauer Straße 116, D-04347 Leipzig, Germany.
Department Bio Industrial Services, Inno Tech Alberta, PO Bag 4000, HWY 16A and 75 Street, Vegreville, AB T9C 1T4, Canada.
Bioengineering (Basel). 2020 Sep 7;7(3):106. doi: 10.3390/bioengineering7030106.
Chicken manure is an agricultural residue material with a high biomass potential. The energetical utilization of this feedstock via anaerobic digestion is an interesting waste treatment option. One waste treatment technology most appropriate for the treatment of stackable (non-free-flowing) dry organic waste materials is the dry batch anaerobic digestion process. The aim of this study was to evaluate the substrate suitability of chicken manure from various sources as feedstock for percolation processes. Chicken manure samples from different housing forms were investigated for their chemical and physical material properties, such as feedstock composition, permeability under compaction and material compressibility. The permeability under compaction of chicken manure ranged from impermeable to sufficiently permeable depending on the type of chicken housing, manure age and bedding material used. Porous materials, such as straw and woodchips, were successfully tested as substrate additives with the ability to enhance material mixture properties to yield superior permeability and allow sufficient percolation. In dry anaerobic batch digestion trials at lab scale, the biogas generation of chicken manure with and without any structure material addition was investigated. Digestion trials were carried out without solid inoculum addition and secondary methanization of volatile components. The specific methane yield of dry chicken manure was measured and found to be 120 to 145 mL/g volatile solids (VS) and 70 to 75 mL/g fresh matter (FM), which represents approximately 70% of the methane potential based on fresh mass of common energy crops, such as corn silage.
鸡粪是一种具有高生物质潜力的农业残余物。通过厌氧消化对这种原料进行能源利用是一种有趣的废物处理选择。一种最适合处理可堆叠（非自由流动）干有机废物的废物处理技术是干式间歇厌氧消化工艺。本研究的目的是评估来自不同来源的鸡粪作为渗滤工艺原料的底物适用性。对来自不同饲养形式的鸡粪样本进行了化学和物理材料特性研究，如原料组成、压实下的渗透性和材料压缩性。根据鸡舍类型、粪便年龄和所用垫料的不同，鸡粪压实下的渗透性从不可渗透到足够渗透不等。稻草和木屑等多孔材料作为底物添加剂进行了成功测试，它们能够改善材料混合物特性，以产生优异的渗透性并实现充分渗滤。在实验室规模的干式厌氧间歇消化试验中，研究了添加和不添加任何结构材料的鸡粪的沼气产生情况。消化试验在不添加固体接种物和挥发性成分二次甲烷化的情况下进行。测量了干鸡粪的比甲烷产量，发现为120至145毫升/克挥发性固体（VS）和70至75毫升/克鲜物质（FM），这约占基于玉米青贮等常见能源作物鲜质量的甲烷潜力的70%。
