生态与农村环境学报 ›› 2015, Vol. 31 ›› Issue (1): 124-130.doi: 10.11934/j.issn.1673-4831.2015.01.019

• 污染控制与修复 • 上一篇    下一篇

餐厨垃圾与玉米秸秆混合中温发酵产气效果模拟

蒋滔,李平,任桂英,高立洪,韦秀丽,刘科,李萍,向远勇   

  1. 重庆市农业科学院
  • 收稿日期:2014-06-16 修回日期:2014-10-21 出版日期:2015-01-25 发布日期:2015-04-15
  • 通讯作者: 李平 重庆市农业科学院 E-mail:35606290@qq.com
  • 作者简介:蒋滔(1983—),男,四川遂宁人,助理研究员,博士,主要从事农业废弃物资源利用和水污染与水生态等方面的研究。E-mail:273021978@qq.com
  • 基金资助:

    国家国际科技合作专项(2013DFA61260); 重庆市基本科研业务费计划项目(2013cstc-jbky-00517); 重庆市农业科学院“百名博士引进培养工程”

Simulation on Mesophilic Gassy Fermentation by Food Waste Mixed with Corn Straw

JIANG  Tao, LI  Ping, REN  Gui-Ying, GAO  Li-Hong, WEI  Xiu-Li, LIU  Ke, LI  Ping, XIANG  Yuan-Yong   

  1. Chongqing Academy of Agricultural Sciences
  • Received:2014-06-16 Revised:2014-10-21 Online:2015-01-25 Published:2015-04-15
  • Contact: LI Ping Chongqing Academy of Agricultural Sciences E-mail:35606290@qq.com

摘要: 在恒温35 ℃和料液中ω(总固体)为5%的条件下,以农村餐厨垃圾及碱液预处理后的玉米秸秆为原料,以实验室内培养的不产气厌氧活性污泥为接种物,研究餐厨垃圾与玉米秸秆不同配比(干物质质量比分别为1 ∶ 3、1 ∶ 2、1 ∶ 1、2 ∶ 1、3 ∶ 1 和1 ∶ 0)混合发酵对产气效果的影响。结果表明,餐厨垃圾与玉米秸秆以1 ∶ 2 配比的处理CH 累积产量最大,平均为12 741 mL,挥发性固体(VS)CH 产率为299.9 mL·g-1。对发酵过程中pH 值的测定结果表明,餐厨垃圾与玉米秸秆混合厌氧消化可以提高厌氧消化系统的缓冲性和稳定性。修正的冈珀茨模型(Gompertz)能较好地拟合餐厨垃圾-玉米秸秆混合发酵产CH 过程,并且伴随秸秆比率的提高,发酵延滞期和周期逐渐缩短。因此,在餐厨垃圾中加入秸秆可有效提高餐厨垃圾厌氧消化的产气率和生物降解效率。

关键词: 餐厨垃圾, 玉米秸秆, 厌氧发酵, CH

Abstract: The present study investigated mesophilic gassy fermentation by food waste mixed with corn straw.Food waste and corn straw were mixed in different level of dry matter ratio,i.e.1:3, 1:2, 1:1, 2:1, 3:1 ,1:0 .Under the condition of 35℃ and total solid mass fraction (ω)of 5%,the characteristics of gas production on different ratio of food waste and corn straw were evaluated.Results show that when the ratio of kitchen waste and corn straw is 1:2, CH4 average prodution reached up to 12741mL,with a yield of 299.9mL•g-1volatile solids(VS).Simultaneous measurement of pH value indicated that co-digestion of  food waste with corn straw created a well buffering environment for anaerobic fermentation and improved the stability of gas production.The fermentation process of food waste and corn straw could be well simulated by modified Gompertz equation,indicating that lag phase and duration of fermentation would decrease with in crease in corn staw ratio in the mixture.Therefore,it is suggested that fermentation of food waste with corn straw will significantly improve gas production and biodegradation in the system.

Key words: kitchen waste, corn stalk, anaerobic fermentation, CH4

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