Abouelenien Fatma, Namba Yuzaburo, Nishio Naomichi, Nakashimada Yutaka
Department of Hygiene and Preventive Medicine, Faculty of Vet Med, Kafer Elshikh University, Kafr Elsheikh, Egypt.
Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Kagamiyama 1-3-1, Higashi, Hiroshima, 739-8530, Japan.
Appl Biochem Biotechnol. 2016 Mar;178(5):932-46. doi: 10.1007/s12010-015-1919-1. Epub 2015 Nov 11.
This study tested the effect on thermophilic and mesophilic digestion of poultry manure (PM) or treated poultry manure (TPM) by the addition of agriculture wastes (AWS) as a co-substrate under dry conditions. PM was co-digested with a mixture of AWS consisting of coconut waste, cassava waste, and coffee grounds. Results were increased methane content in biogas, with decreased ammonia accumulation and volatile acids. The highest performance occurred under mesophilic conditions, with a 63 and 41.3 % increase in methane production from addition of AWS to TPM (562 vs. 344 mL g VS(-1) from control) and PM (406 vs. 287 mL g VS(-1) from control), respectively. Thermophilic conditions showed lower performance than mesophilic conditions. Addition of AWS increased methane production by 150 and 69.6 % from PM (323.4 vs. 129 mL g VS(-1) from control) and TPM (297.6 vs. 175.5 mL g VS(-1) from control), respectively. In all experiments, 100 % acetate produced was degraded to methane. Maximum ammonia accumulation was lowered to 43.7 % by mixing of AWS (range 5.35-8.55 vs. 7.81-12.28 g N kg(-1) bed). The pH was held at 7.3-8.8, a range suitable for methanogenesis.
本研究测试了在干燥条件下添加农业废弃物（AWS）作为共底物对家禽粪便（PM）或处理过的家禽粪便（TPM）进行嗜热和中温消化的影响。PM与由椰子废料、木薯废料和咖啡渣组成的AWS混合物进行共消化。结果是沼气中甲烷含量增加，氨积累和挥发性酸减少。最高性能出现在中温条件下，向TPM添加AWS使甲烷产量分别增加63%和41.3%（对照为562对344 mL g VS⁻¹），向PM添加AWS使甲烷产量分别增加63%和41.3%（对照为406对287 mL g VS⁻¹）。嗜热条件下的性能低于中温条件。添加AWS分别使PM（323.4对129 mL g VS⁻¹，对照）和TPM（297.6对175.5 mL g VS⁻¹，对照）的甲烷产量增加150%和69.6%。在所有实验中，产生的100%乙酸盐都降解为甲烷。通过混合AWS将最大氨积累降低到43.7%（范围为5.35 - 8.55对7.81 - 12.28 g N kg⁻¹床）。pH保持在7.3 - 8.8，这是适合甲烷生成的范围。
