Development of disposal method of sweet potato shochu distilled slops by water jet process

水射流处理甘薯烧酒蒸馏废液方法的开发

• 批准号: 10660311
• 负责人: HAYASHI Nobuyuki
• 金额: $ 2.18万
• 依托单位: SAGA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10660311/
• 关键词: distilled slops of sweet potato shochu; Water jet treatment; cell crushing; pressure dehydration; chitosan flocculant; solid-liquid separation; キトサン凝集剤; ジェット水流

The protocol of London in l993 put shochu distillers under an obligation to quit ocean dumping of distilled slops by 2000. However, it is very difficult to cry out the waste treatment on land because distilled slops of sweet potato shochu has around 50,000 of BOD. Potato cells that one of the main solid portion in slops float in fluid just like balloon with much amount of water. Therefore, the obtained solid fraction after liquid-solid separating treatment, represented by centrifugal decantation, contains 90% of water. This fact indicates that the separated solid waste is perishable and is difficult consecutive utilization until new disposal method development. This study focused on the improvement of liquid-solid separation efficiency by crushing the cells floating in waste fluid using the newly developed water jet crusher. Pumped out slops fluid is led to collide by frontal clash at 250 - 1000 kgf/cmィイD12ィエD1. As a result of the observation with microscope, the number of crashed cells were increased with increasing extruding pressure and almost of all cells were crashed at l000 kgf/cmィイD12ィエD1. Water jet treated slops fluid showed more than two times higher dehydration speed at filter press test. Obtained dehydrated cake has only 45% of water. Flocculation and centrifugal separation were also performed on water jet treated slops. While there was little difference with intact fluid on solid-liquid separation efficiency, an important findings that the chitosan flocculant effectively coagulates at one tenth concentration of poly-aluminum chloride (PAC).

1993年的伦敦议定书规定，到2000年，烧酒酿酒商有义务停止向海洋倾倒蒸馏废液。然而，在陆地上进行废物处理是非常困难的，因为甘薯烧酒的蒸馏废液具有约50，000的BOD。马铃薯细胞是污水中主要的固体成分之一，它像气球一样漂浮在含有大量水分的液体中。因此，以离心倾析为代表的液-固分离处理后得到的固体部分含有90%的水。这一事实表明，分离的固体废物是易腐的，很难连续利用，直到新的处理方法的发展。本研究主要探讨利用新型水射流破碎机破碎废液中漂浮的细胞，以提高液固分离效率。泵出的污液在250 - 1000 kgf/cm水柱D12水柱D1下正面碰撞。用显微镜观察的结果是，破碎的细胞数量随着挤压压力的增加而增加，在1000 kgf/cm × 10 - 12 × 10 - 1经水射流处理后的污水在压滤试验中脱水速度提高了2倍以上。得到的脱水饼只有45%的水。对水射流处理后的污油进行了絮凝和离心分离试验。虽然与完整流体在固液分离效率上几乎没有差异，但重要的发现是，壳聚糖絮凝剂在十分之一浓度的聚合氯化铝（PAC）下有效地絮凝。