摘要
餐厨垃圾与污泥是城市垃圾的重要组成部分,作为可再生资源,目前餐厨垃圾与城市污泥共发酵产甲烷成为国内外垃圾能源化利用的主要方法。氨氮浓度是抑制发酵效率的一个影响因素,在中温(37℃)厌氧条件下,以餐厨垃圾与污泥1∶1混合发酵,为提高发酵效率,进行发酵过程中脱氮研究;试验研究了发酵过程中氨氮的变化规律,确定发酵第15天为最佳脱氮时间;建立L16(45)正交设计,研究了吹脱时间、吹脱强度、pH值、絮凝剂(PAM)添加量对脱氮的影响。对正交试验结果进行分析,得出吹脱时间为10 h、pH值为12、吹脱强度为20 L/h、絮凝剂(PAM)投加量为2.5 mg∕0.2 L是最佳脱氮工艺条件。
Kitchen waste and sludge are an important component of municipal refuse , As renew- able energy, food waste and sludge produce methane from co-fermentation become the main method of resource application at home and abroad currently. The concentration of NH3-N is the first influence factor in the inhibition of fermentation efficiency. The fermentation of the mixture consisted of food waste and sewage sludge （1：1） at the temperature of 37 ℃, the denitrogenation was studied in order to increase fermentation efficiency, the changes law of ammonia in the fermentation were found. The experimental results indicated that the optimal denitrogenation time was at 15 th day in the fermentatilbn. L16 （4s） orthogonal design was established, and the effect of the stripping time, stripping strength, pH and the addition of flocculant（PAM ） to the denitrogenation were considered. The orthogonal results showed that the optimal conditions of stripping time was 10 h,stripping strength was 20 L/h,pH was 12 and the addition of flocculant（PAM ） was 2.5 mg/0.2 L.
出处
《可再生能源》
CAS
北大核心
2011年第6期98-101,共4页
Renewable Energy Resources
基金
苏州市环保科技项目(苏环计字[2010]37号)
关键词
餐厨垃圾
厌氧发酵
正交设计
脱氮
kitchen waste
anaerobic fermentation
orthogonal design
denitrogenation
