| 李爱秀,翟中葳,丁飞飞,杜连柱,张克强.鸟粪石沉淀法回收猪场沼液氮磷工艺参数优化模拟研究[J].农业环境科学学报,2018,37(6):1270-1276. |
| 鸟粪石沉淀法回收猪场沼液氮磷工艺参数优化模拟研究 |
| Simulation of optimization of process parameters of nitrogen and phosphorus recovery in biogas slurry derived from swine manure by struvite precipitation method |
| 投稿时间：2018-01-28 |
| DOI：10.11654/jaes.2018-0157 |
| 中文关键词: 氮磷回收率 猪场沼液 响应面设计 最优参数 |
| 英文关键词: nitrogen and phosphorus recovery swine manure response surface methodology optimal parameters |
| 基金项目:中国农业科学院科技创新工程；天津市农业科技成果转化项目（201601290）；现代农业（奶牛）产业技术体系建设专项资金（CARS-36） |
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| 中文摘要: |
| 针对规模化养殖场沼液难以农田消纳的问题，探索化学方法回收沼液中氮磷的工艺条件和优化参数。本研究选择猪场沼液为研究对象，采用鸟粪石沉淀法，进行单因素影响试验，选取pH、镁氮比、磷氮比为自变量，以氮磷回收率为响应值，通过Box-Behnken响应面试验设计对工艺参数进行优化。结果显示：猪场沼液氮磷回收的最佳工艺为：pH 10，镁氮比为1.1，磷氮比为0.6，氨氮回收率为65.21%，磷酸盐回收率为89.47%，实际值氨氮回收率为65.01%，磷酸盐回收率为90.81%，差值分别为0.20%、1.34%，回归模型拟合较好。 |
| 英文摘要: |
| The present study focuses on exploring the process conditions of nitrogen and phosphorus recovery from biogas slurry and optimizing the process parameters using a chemical method to alleviate the difficulties faced by large-scale farms in the digestion of biogas slurry. The biogas slurry of swine manure was assessed. By using the struvite precipitation method, the influence of factors such as pH, magnesium:nitrogen ratio, and phosphorus:nitrogen ratio on the nitrogen and phosphorus recovery rate was investigated and optimized using the Box-Behnken response surface methodology design. The optimum conditions for the recovery of nitrogen and phosphorus in biogas slurry from swine manure were a pH of 10, a magnesium:nitrogen ratio of 1.1, and a phosphorus:nitrogen ratio of 0.6. Under the above optimized conditions, the recovery rates for ammonia and phosphate were 65.21% and 89.47%, respectively. In the actual experiments, the recovery rates for ammonia and phosphate were 65.01% and 90.81%, respectively, with difference values of 0.20% and 1.34%, respectively, indicating good fit with the regression model. |
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