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本文研究了在循环利用的铬鞣废液中CI^-、SO4^2-、Na^+等的变化规律。研究结果表明,在循环利用的铬鞣废液中,其中性盐只是在循环利用的初期有变化,如果在前几次循环利用过程中,对皮革的质量不产生影响,那么在以后的循环过程中也不会对皮革的产品质量产生影响。 相似文献
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近些年来,在意大利Santa Croce地区的一家制革厂使用halprogtti公司的设备,以使浸水液、浸灰/脱毛液、软化液和浸酸液等废液的循环利用达到自动化,该厂每天产量为15—20t植鞣颈肩革。 相似文献
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近年来,在意大利Santa Croce地区的一家制革厂使用Italprogtti公司的设备,以使浸水液、浸灰/脱毛液、软化液和浸酸液等废液的循环利用达到自动化。该厂每天产量为15-20吨植鞣颈肩革。 相似文献
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桦木磺化化机浆化学预处理废液的循环使用刘秉钺(大连轻工业学院华南理工大学国内访问学者)梁文芷(华南理工大学)邢效功(大连轻工业学院)关键词桦木SCMP预处理废液浸泡废液循环利用1前言我国东北地区桦木储量十分丰富,仅吉林省白桦的储量就达7479万立方米... 相似文献
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分析了再生陶瓷混凝土的密度、劈拉强度、抗折强度、弹性模量及其耐磨性能与抗压强度之间的关系.结果表明:再生陶瓷粗骨料混凝土抗压强度、劈拉强度、抗折强度较普通混凝土有所降低,但耐磨性能好;再生陶瓷细骨料混凝土抗压强度有所提高.因此,废弃家用和建筑陶瓷用于制作再生混凝土是可行的. 相似文献
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The distillery effluent from a starch waste based ethanol plant has been disposed of by spray irrigation for some time. The alternative methods of disposal are reviewed and their then costs compared for a 50 Ml/year plant. Anaerobic digestion can reduce pollution load significantly but it requires more investment and increased annual cost. Partial solids recovery by ultrafiltration (UF) does not reduce the pollution as much, but results in a byproduct for sale and a payback period of under six years for the extra investment. Further solids recovery by UF and nanofiltration requires a much longer payback period for the extra investment. Further research is required for more economical solids recovery and better value added byproducts. 相似文献
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Frances Jack John Bostock Duarte Tito Barry Harrison James Brosnan 《Journal of the Institute of Brewing》2014,120(1):60-64
Electrocoagulation, an electrochemical technique used to remove heavy metals from wastewaters, was explored in relation to its potential to remove copper from distillery waste streams. An initial laboratory‐scale study demonstrated that copper in spent lees could be reduced by up to 95% using electrocoagulation. Copper could not be removed from caustic washwater, as passivation of the electrodes meant that no floc was formed. However, the washwaters could be treated if mixed with spent lees, with an 80% reduction in copper being obtained. The electrocoagulation system was scaled up and its performance evaluated in a trial at a large Scotch malt whisky distillery. Copper reductions of 88% were achieved at low power consumption (34 W h/m3), while at 112 W h/m3 residual copper levels were reduced by 96%. This trial was carried out at a flow rate of 1000 L/h, demonstrating that the technology could readily handle the volumes and flow rates required in practice. Both the capital and running costs of an electrocoagulation system are low, while the technique presents other advantages over the existing copper removal technologies currently in use in the distilled spirits sector. Copyright © 2014 The Institute of Brewing & Distilling 相似文献
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《食品与发酵工业》2016,(2):54-58
蒸馏废液回用可有效减少酒精生产中的废水排放量,但会导致发酵结束后残糖升高。研究发现,蒸馏废液对液化过程的抑制是造成残糖升高的主要原因。文中考察了蒸馏废液中金属离子对耐高温ɑ-淀粉酶酶活及二级结构(ɑ-螺旋、β-折叠、β-转角及无规则卷曲)的影响。结果表明,在对应浓度下(与蒸馏废液中的浓度一致),Na~+(55.89 mmol/L)和K+(33.27 mmol/L)对淀粉酶酶活没有影响;Al~(3+)(3.85 mmol/L)和Li+(0.98mmol/L)对酶活有轻微抑制;Mg~(2+)(7.24 mmol/L)和Ca~(2+)(3.87 mmol/L)对酶活有促进作用;Fe~(3+)(1.40 mmol/L)使酶活下降19.18%。淀粉酶二级结构中ɑ-螺旋含量下降可能是Fe~(3+)造成酶活下降的原因。蒸馏废液中加入16mmol/L Mg2+可以使液化效果恢复至正常水平,并降低酒精发酵结束后的残糖含量。 相似文献
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深度探析 我国废纸回收与利用体系建设 总被引:1,自引:0,他引:1
利用废纸造纸是实现纸业节能减排的重要途径。加快建立、健全国内废纸回收系统,制定和完善相关的法规、标准,培育大型回收企业,探索国内废纸回收利用发展模式,规范废纸回收行为,提高国内废纸回收的质量和数量,提高国内废纸有效供给水平,是解决我国造纸工业原料严重短缺的重要途径。江苏纸联的做法和经验值得借鉴与推广。 相似文献
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啤酒废酵母综合利用的探讨 总被引:1,自引:0,他引:1
啤酒废酵母含有丰富的营养物质 ,许多啤酒厂并没有充分利用 ,而是作为废弃物排入啤酒废水 ,增加了啤酒废水的处理负荷和难度。本文介绍了目前啤酒企业处理啤酒废酵母的一些可行的方法。 相似文献
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以纤维废弃物为原料,采用纤维素酶降解糖化发酵生产酒精.结果表明:甘蔗渣经1.0%稀硫酸121℃保温2 h预处理后,采用40 U/g纤维素酶,50℃,pH=5.0,酶解120 min,得糖率为36.8%.由正交试验分析可知,用酿酒酵母发酵生产酒精的最佳条件为:发酵时间72 h,发酵温度为28℃,酵母接种量1.00%,在此条件下,酒精产率为15.31 g/g;4个因素对酒精产率的影响,其重要性顺序依次为发酵时间>发酵温度>酵母接种量>纤维素酶用量. 相似文献