柑橘皮渣厌氧发酵的碱热预处理优化研究  

EFFECT OF THERMAL ALKALINE PRETREATMENT ON ANAEROBIC DIGESTION OF CITRUS PROCEESING WASTE

作　　者：席江[1,2] 艾平[1] 王殿龙[1,2] 田启欢 段奇武 张衍林 Xi Jiang;Ai Ping;Wang Dianlong;Tian Qihuan;Duan Qiwu;Zhang Yanlin(College of Engineering,Huazhong Agricultural University,Wuhan 430070,China;Biogas Institute of Ministry of Agriculture,Chengdu 610041,China)

机构地区：[1]华中农业大学工学院,武汉430070 [2]农业部沼气科学研究所,成都610041

出　　处：《太阳能学报》2018年第7期1971-1980,共10页Acta Energiae Solaris Sinica

基　　金：国家科技支撑计划课题城镇化分散原料集中供气模式研究与应用示范(2015BAD21B03);中国农业科学院科技创新工程农产品加工废弃物沼气化利用创新团队项目;农业部沼气科学研究所基本科研业务费专项资金(12017206030202207)

摘　　要：采用不同碱热预处理条件对柑橘皮渣进行预处理,研究对底物水解和高温厌氧发酵的促进作用。实验发现,碱热预处理柑橘皮6h比预处理12和24h更为经济可行;NaOH浓度为5.0%和7.5%处理柑橘皮6h,分别得到最高的乙醇和乙酸含量,70℃、NaOH浓度7.5%预处理后厌氧发酵得到最高产甲烷潜力为274.2mL/g VS,较对照提高20.1%;而将柑橘榨汁渣在70℃、pH值11的条件下预处理6h后厌氧发酵,得到最大的产甲烷潜力258.7mL/g VS,较对照提高39.9%,预处理后pH值为7.03,可直接用于厌氧发酵,具有实际应用的价值。Using the citrus processing waste（citrus peel wste,citrus pressing waste）as the substrate of anaerobicdigestion is a promising alternative to the reuse of citrus processing waste.And the thermal alkaline pretreatmentcould increase the p H of the substrate,the biodegradability of cellulose materials,and the production of methane.The s CODs are decreased when the duration of pretreatment of citrus peel waste（CPW1）are increased from 6 h to24 h.The duration of 6 h is found to be the most economical one,because of the less energy input,although the VSdegradation rates are slightly lower at the NaOH loading rate of 5.0% and 7.5%（g NaOH/g VS）.And at the NaOHloading rate of 5.0% and 7.5%,the highest ethanol and acetic acid are produced after the pretreatment of CPW1 for6 h.At 70 ℃ and NaOH loading rate of 7.5%（p H 11.06±0.04）,the cumulative methane production is 274.2 m L/g VS,which is the highest and 20.1% higher in comparison with the untreated CPW1.The thermal alkaline pretreatmentcould also improve the anaerobic digestion of citrus pressing waste（CPW2）.And the highest cumulative methaneproduction is the pretreatment at 70 ℃,p H 11,which obtains 258.7 m L/g VS,and it is 39.9% higher than theuntreated CPW2.And the p H is 7.03 after pretreatement,so it is recommended as the optimum pretreatmentcondition of CPW2,because of the highest methane production and the less chemical use.

关 键 词：柑橘 废弃物 厌氧发酵 碱热预处理 

分 类 号：S216.4[农业科学—农业机械化工程] X712[农业科学—农业工程]