| 刘金力,洪秀杰,白岩,毕少杰,杨宏志,王彦杰.响应面法优化餐厨垃圾和牛粪混合两相厌氧发酵酸化条件[J].农业环境科学学报,2019,38(8):1786-1793. |
| 响应面法优化餐厨垃圾和牛粪混合两相厌氧发酵酸化条件 |
| Optimization of the acidification condition in anaerobic fermentation of food waste and cow manure based on response surface methodology |
| 投稿时间：2019-04-06 |
| DOI：10.11654/jaes.2019-0371 |
| 中文关键词: 餐厨垃圾 牛粪 厌氧发酵 响应面 酸化条件 |
| 英文关键词: food waste cow manure anaerobic fermentation response surface acidification condition |
| 基金项目:国家重点研发计划项目（2017YFD080080203）；黑龙江省重点实验室开放基金项目（201703）；黑龙江八一农垦大学三横三纵支持计划（TDJH201809） |
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| 中文摘要: |
| 为提高废弃物厌氧发酵的利用率，开展了牛粪和餐厨垃圾混合两相厌氧发酵过程中酸化条件优化的研究，探究在酸化相中搅拌频率、搅拌速率、酸化浓度、酸化时间和酸化温度对甲烷产率的影响。单因素试验结果表明，最佳的搅拌频率、搅拌速率、酸化浓度、酸化时间和酸化温度分别为：3次·d-1（2 min·次-1）、50 r·min-1、12%、8 h和35℃。在单因素试验基础上，采用响应面法对发酵过程中酸化条件进行优化，以甲烷产率为响应值，选取酸化温度、酸化浓度和酸化时间3个因素研究其对发酵过程中产气率的影响。结果表明，对甲烷产率影响的大小顺序为酸化时间 > 酸化温度 > 酸化浓度。最佳的酸化条件为：酸化时间7.6 h、酸化温度35.8℃和酸化浓度10.4%；搅拌频率和搅拌速率分别为3次·d-1（2 min·次-1）和50 r·min-1。采用最佳酸化条件处理后，混合原料的甲烷产率可达290.5 mL·g-1 VS，比未经酸化处理提高了17.9%。研究表明，对牛粪和餐厨垃圾两相厌氧发酵中酸化相的酸化条件进行优化，可提高甲烷产率、甲烷含量及VS去除率。 |
| 英文摘要: |
| The objective of the study was to create appropriate conditions for waste recycling anaerobic fermentation. Therefore, the optimization of acidification conditions during the mixed anaerobic fermentation of food waste and cow manure was conducted using response surface methodology. Single factor experiments showed the optimal stirring frequency, stirring rate, acidification concentration, acidification time, and acidification temperature were 3 times·d-1 (2 min·time-1), 50 r·min-1, 12%, 8 h, and 35℃, respectively. Based on this, the fermentation process in acidification conditions was optimized. The effect of the three factors, acidification temperature, acid concentration, and acidification time on the fermentation process was studied using methane production rate as the response value. The results of the BoxBehnken design and response surface methodology showed the optimum fermentation was at 7.6 h, acidification time; 10.4%, acidification concentration; and 35.8℃, acidification temperature. The optimal stirring frequency and speed were 3 times·d-1 (2 min·time-1) and 50 r·min-1, respectively. After the optimal acidification treatment, the methane production rate of the mixed raw material can reach 290.5 mL·g-1 VS, which is 17.9% higher than that of the raw material without the acidification treatment. Optimization of acidification conditions of the acidification phase in anaerobic fermentation of cow manure and kitchen waste can improve methane production rate, methane content, and volatile solid removal rate. |
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