摘要
通过交替式好氧厌氧堆肥处理造纸污泥试验,研究氮素的变化规律。结果表明:堆肥初始的中高温期,主要是堆体中的有机氮转化为氨氮;之后的降温期和腐熟期是硝态氮形成的主要阶段;总氮在整个堆肥阶段呈上升趋势。无机氮(NH3-N,NO3--N)可以直接被作物吸收,是污泥堆肥中的主要氮素形态,因此减少堆肥初期氨氮的挥发,增加腐熟阶段NO3--N的形成,以及降低滤液中无机氮的流失是提高造纸污泥堆肥肥效的关键。
The technology of alternative aerobic and anaerobic composting of pulp and paper sludge was carried out to study the behavior of nitrogen transition. The study showed that TN was increased by composting on the whole; most organic nitrogen changed into ammonia nitrogen during middle and high temperature composting because of ammonification. The concentration of NO3-N increased during the low temperature composting and its decaying period. Inorganic nitrogen （NH3-N, NO^-3-N）can be directly absorbed by crops and it is main form of nitrogen in sludge compost so. The key step to improve the compost feitility is preventing volatilization of NH3-N during middle and high temperature period, increasing production of NO^-3-N in low tempera-ture and decaying stage, and losing the abio-nitrogen in the filtrate.
出处
《环境卫生工程》
2007年第3期1-4,共4页
Environmental Sanitation Engineering
基金
广东省环保局科技研究开发项目(2001-28)
关键词
造纸污泥
堆肥
氮素
pulp and paper mill sludge
composting
nitrogen
