Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Japan.
Bioresour Technol. 2010 Aug;101(16):6368-73. doi: 10.1016/j.biortech.2010.03.071. Epub 2010 Apr 8.
This study demonstrates methane fermentation that was carried out along with ammonia striping to avoid ammonia accumulation that significantly inhibited methane production. Ammonia was successfully removed by means of recycling of biogas followed by gas washing in sulfuric acid to capture ammonia, when chicken manure was anaerobically digested for 4 days at 55 degrees C and at an initial pH of 8-9. By using this method, 80% of total nitrogen in chicken manure was converted to ammonia and 82% of the produced ammonia was removed. A bench scale reactor equipped with an ammonia-stripping unit for methane production from chicken manure was developed and operated in repeated batch mode. At an initial pH of 8 and at 55 degrees C, 195 and 157 ml g-VS(-1) of methane was successfully produced from the treated chicken manure and the mixture of treated chicken manure and raw chicken manure in the ratio of 1:1, respectively. In this method, ammonia concentration was maintained at a level lower than 2g-N kg-wet sludge(-1) in the reactor.
本研究采用甲烷发酵与氨汽提相结合的方法，避免了氨积累对甲烷生产的显著抑制。当鸡粪在 55°C 和初始 pH 值为 8-9 的条件下进行厌氧消化 4 天时，通过沼气的再循环和硫酸中的气体洗涤来捕获氨，成功地去除了氨。采用这种方法，鸡粪中 80%的总氮转化为氨，产生的氨中有 82%被去除。开发并以重复批处理模式运行了一个配备氨汽提单元的鸡粪甲烷生产中试规模反应器。在初始 pH 值为 8 和 55°C 的条件下，成功地从处理后的鸡粪和处理后的鸡粪与生鸡粪按 1:1 的比例混合的混合物中分别产生了 195 和 157ml g-VS(-1)的甲烷。在这种方法中，氨浓度在反应器中保持在低于 2g-N kg-湿污泥(-1)的水平。
