青霉素菌渣厌氧消化技术研究  

Anaerobic Digestion of Penicillin Bacterial Residue

作　　者：王勇军 陈平 韦惠民 杨永会 周崇晖 吕永涛 赵秀梅 

机构地区：[1]河北华药环境保护研究所有限公司,河北石家庄050015

出　　处：《中国沼气》2015年第5期28-31,共4页China Biogas

基　　金：河北省重大技术创新项目(12276703Z)

摘　　要：试验采用热水解的方式对青霉素菌渣进行预处理,确定预处理的最佳工艺条件为：加水量3倍,水解温度60℃,水解时间30分钟。在此条件下,处理后残渣中青霉素残留小于0.5 mg·kg-1,凯氏氮消减率大于45%,为菌渣后续厌氧消化高效、稳定进行创造有利条件。通过研究发现,热水解破坏了绝大部分青霉素的分子结构,而菌渣中凯氏氮的消减只是单纯的物理转移。经预处理后的菌渣与剩余污泥联合厌氧消化,系统进料固含量5%~7%,有机负荷3~4 kg COD·m-3d-1,消化时间20 d,可控制系统氨氮浓度在3500 mg·L-1之内,挥发性有机酸浓度在1200~1400 mg·L-1。沼渣青霉素残留未检出,其它各项指标均低于《危险废物鉴别标准》（GB 5085.7-2007）的标准值,沼渣肥效成分满足《有机肥料》（NY 525-2012）指标要求。To pre-treat the penicillin mycelium with the method of thermal hydrolysis,the optimum condition was chosen as： 3 times of water addition,hydrolysis temperature of 60 ℃ for 30 minutes. after this pretreatment,the content of penicillin residue was less than 0. 50 mg·kg- 1,and the reduction rate of Kjeldahl nitrogen was more than 45%. This provided favorable condition for later anaerobic digestion. It was found that the thermal hydrolysis destroyed most of the molecular structure of the penicillin. And the reduced Kjeldahl nitrogen in the mycelium was simply physical transferred. The pretreated mycelium was anaerobically co-digested with excess sludge under condition of feeding solid content of 5% ~ 7%,organic load of 3 ~ 4 kg COD·m- 3d- 1,and retention time of 20 days. The nitrogen concentration in the system could be controlled within the 3500 mg·L- 1,volatile organic acids in 1200 ~ 1400 mg·L- 1. The penicillin residue in biogas residue was not detectable. The other indicator items were all lower than the standard in ＂ Hazardous Waste Identification Standard＂（ GB 5085. 7-2007）. The fertilizing ingredients in this biogas residue meet the requirement of ＂ Organic Fertilizer＂（ NY 525-2012）.

关 键 词：青霉素菌渣 热水解 预处理 厌氧消化 

分 类 号：S216.4[农业科学—农业机械化工程] X787[农业科学—农业工程]