| 摘要: |
| 【目的】研究猪粪、牛粪与玉米秸秆混合原料厌氧发酵的最佳工艺条件。【方法】采用单因素试验考察了猪粪与牛粪的混合比例（质量比）、粪秆比（猪粪和牛粪总量与玉米秸秆干物质质量比）、总固体质量分数3个因素对厌氧发酵过程累积产气量的影响，并在此基础上通过Box-Behnken试验设计及响应面分析对厌氧发酵工艺进行优化。【结果】在单因素试验中，当猪粪与牛粪混合比例为1∶1，粪秆比为1.86∶1及总固体质量分数为11%时，累积产气量均较高。猪粪、牛粪与玉米秸秆混合厌氧发酵的最佳工艺条件为：猪粪与牛粪混合比例为1.06∶1、粪秆比为2.94∶1、总固体质量分数为10.68%。【结论】在猪粪、牛粪与玉米秸秆混合厌氧发酵的最佳工艺下，累积产气量可达17 170 mL。 |
| 关键词: 混合原料 厌氧发酵 累积产气量 Box-Behnken试验设计 响应面分析 |
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| 基金项目:国家“十二五”科技支撑计划项目（2011BAD15B03）；中央高校基本科研业务费专项资金项目（QM2012002）；陕西“13115”重大专项（2010ZDKG-06） |
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| Optimization of fermentation process of manure and corn straw by response surface methodology |
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| Abstract: |
| 【Objective】In this paper,we studied the optimal technological conditions for anaerobic fermentation of mixed raw materials with pig manure,cow manure and corn straw.【Method】The effects of pig dung to cow dung ratio,manure to corn straw ratio and total solid (TS) on the biogas production efficiency of anaerobic fermentation were investigated by single factor experiments.Then,the Box-Behnken design experiments and response surface methodology (RSM) were used in the optimization of anaerobic fermentation technology.【Result】Highest cumulative biogas yield was obtained by single factor when the ratio of pig dung to cow dung was 1∶1,the ratio of manure to corn straw was 1.86∶1 and TS was 11%.Consequently,the optimal technological conditions were confirmed:The ratio of pig dung to cow dung as 1.06∶1,the ratio of manure to corn straw was 2.94∶1 and TS was 10.68%.【Conclusion】We obtained the optimal technological parameters for anaerobic fermentation of mixed raw materials with pig manure,cow manure and corn straw.Under optimal conditions,the cumulative biogas yield was up to 17 170 mL. |
| Key words: the raw material mixture anaerobic fermentation cumulative biogas yield BBD experimental design response surface methodology |
