养猪场沼渣提取高附加值产品——腐植酸的工艺研究

发布时间：2018-11-18 20:37

【摘要】：针对养猪场沼渣产生量大,直接作为肥料,污染严重这一难题,文章以养猪场湿沼渣为原料,以盐酸、氢氧化钠、硫酸为助剂从中提取高附加值产品——腐植酸,优化了盐酸用量、活化温度、活化时间及氢氧化钠用量等影响沼渣提取腐植酸的因子。对于含水率94.19%,质量50 g的沼渣,当盐酸用量为50 m L,盐酸活化时间为45 min,活化温度为80℃、氢氧化钠用量为22 mmol时,可得纯腐植酸产品290 mg。红外光谱、核磁氢谱显示提取的腐植酸存在羟基、芳香烯烃等基团,扫描电镜(SEM)显示其形貌、结构未见明显差异,有利于该工艺工业化应用。从养猪场沼渣中提取腐植酸不仅原料易得、工艺操作比较简单,而且提取的腐植酸能够进一步提纯作为医用,产品附加值高,对于养猪场沼渣资源化利用意义重大。
[Abstract]:Aiming at the problem that the production amount of the pig farm residue is large, the fertilizer is directly used as a fertilizer and the pollution is serious, the paper takes the pig farm wet marsh slag as a raw material, and the high-value-added product _ humic acid is extracted from the wet marsh slag of the pig farm, and the amount of the hydrochloric acid and the activation temperature are optimized, the activation time and the amount of sodium hydroxide and the like affect the factors that the marsh slag can extract the humic acid. For the marsh slag with the water content of 94.19% and the mass of 50 g, when the amount of the hydrochloric acid is 50 m L, the activation time of the hydrochloric acid is 45 min, the activation temperature is 80 DEG C, the amount of the sodium hydroxide is 22 mmol, the pure humic acid product is 290 mg. The infrared spectrum and the nuclear magnetic hydrogen spectrum show that the extracted humic acid has a hydroxyl group, an aromatic olefin and the like, and the scanning electron microscope (SEM) shows that the morphology and the structure of the extracted humic acid are not obviously different, thus being beneficial to the industrial application of the process. The method for extracting the humic acid from the pig farm residue is easy to obtain, the process is simple, and the extracted humic acid can be further purified as a medical product, the added value of the product is high, and the method is of great significance to the resource utilization of the pig farm residue.
【作者单位】：常州大学环境与安全工程学院;
【基金】：江苏省科技支撑计划项目(BY2015027-03) 常州市科技计划项目(CE20155061)
【分类号】：S141

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