Analysis of mass flow and proposal of key technologies for establishment of zero-emission processes

通过分析各过程的质量流和能量流建立数据库，并通过开发减排所需的关键技术，研究了在排放量大的典型行业中建立零排放过程。以酱油生产过程为例进行了研究。对各生产线的工艺流程进行了全面分析，绘制了总固液、TOC、N、P、Cl等物料平衡图。研究了滤饼的干馏、加压热水处理和酶解等工艺，以实现滤饼除盐后的有效农业再利用。以化工行业为例，对氯乙烯单体（VCM）生产过程进行了研究。在流量分析的基础上，首次提出了日本氯的总质量平衡表。提出了减少氯乙烷等副产物的有效途径，实现了氯乙烷等副产物的零排放 关于我们 导管生物转化法。公路工程在利用大量天然原生资源的同时，产生了大量的沥青、混凝土、碎石土等副产品。在建立一个先进的副产品回收系统，重要的是要明确的质量流量的原材料和副产品的每一个道路工程在当地。金属工业的零排放是针对铁、铜和锌的生产过程进行研究的。向铜市场供应铜约24000吨，共使用废铜900000吨。作为回收利用技术的一个课题，采用空气吹炼法对铜液中的铁进行了研究。铁含量在2000秒内从约1%下降到小于100ppm。研究了半导体工业中的物料流，分析了未回收物料的排放。还研究了这种排放与其他制造过程的过程间网络。对减少废物所需解决的问题进行了评估，并提出了一些减少废物的备选方案，目前调查中获得的结果已向各行业提出，并作为研究论文在各种期刊上发表。少

The establishment of zero-emission processes in representative industries which discharge a lot of emissions was studied by analyzing the mass and energy flows in each process to make the data-base and by developing the key technologies necessary to reduce the emission. A soy-sauce production process was investigated as an typical example of food industry. The mass flow in the process was completely analyzed for all operating lines and the mass balance charts of total solid and liquid, TOC, N, P and Cl were drawn. The dry distillation, pressurized hot water treatment, and enzymatic hydrolysis of cake were investigated for effective re-use in agriculture by removing salt. Vinyl chloride monomer (VCM) production process was investigated as an example of chemical industry. The total mass balance sheet of chlorine in Japan was first presented based on the flow analysis. A satisfactory way to reduce the byproducts such as chloroethane was proposed to realize the zero-emission of those bypro … More ducts by biological conversion method. The road works generated a large quantities of byproducts such as asphalt, concrete and gravelly soil scraped, while they utilized a lots of natural virgin resources. In establishing an advanced recycle system of byproducts, it was important to clarify the mass flow of raw materials and byproducts for each road work in a local area. The zero-emission in metal industries was studied for iron, copper and zinc production processes. About two million and four thousand tons of copper was supplied to the copper market and nine hundred thousand tons of copper scrap was used in total. As a topic of recycling technology, the removal of iron in molten copper was studied by air blowing process. Iron content decreased from about 1% to less than 100ppm within 2000 sec. Material flow in semiconductor industry was investigated to analyze the emission of unrecycled materials. Inter-process networking of such emissions with the other manufacturing processes was also investigated. The problems to be solved for waste minimization were assessed and some waste minimization options were proposed.Those results obtained in the present investigation were proposed to industries and also published as research papers in various journals. Less