Properties of Bentonite Enhanced Loess and Laterite

Loess and laterite distributed widely in the northern and southern China cannot be directly used as the natural barrier to isolate the solid waste because of their high hydraulic conductivity. In this paper, they are enhanced by bentonite to improve their hydraulic performance. The impact of bentonite content and water content on compressive strength of the compacted soil was investigated. The effects of bentonite content, water content, dry density and hydraulic gradient on the hydraulic conductivity were studied in detail. For the laterite and the laterite with 8% of bentonite, the experimental results of hydraulic conductivity can be applied in the engineering design. However, for the loess and the bentonite enhanced loess, those of hydraulic conductivity can not be directly applied in the engineering design because their hydraulic performance does not comply with the Darcy's law. These experimental results have to be carefully modified before application.

即食海蜇工业化生产工艺的初步研究

研究采用网链式气泡清洗机对海蜇进行脱盐/矾,同时采用过氧化氢和抑菌保鲜液对海蜇进行灭菌保鲜,对该方法的实际应用效果进行了探讨。试验和实践表明:当料液比为1:5,一道脱盐/矾,气流速度6 m3/s,时间40 min,二道脱盐/矾,气流速度4 m3/s,时间40 min,三道脱盐/矾,气流速度3 m3/s,时间30 min的脱盐/矾处理;经过三道脱盐/矾处理,生产的即食海蜇铝的残留量低于100 mg/kg;当食品添加剂过氧化氢溶液使用浓度为1.0 g/kg、浸泡时间8 min时,杀菌效果最佳,经过再次无菌水漂洗生产的即食海蜇过氧化氢残留未检出,同时微生物指标符合相关标准。说明该方法克服了传统杀菌工艺的不足,为海蜇产品深加工提供了新的方法。