淮北谷王淀粉厂废水处理工艺的设计

淮北谷王淀粉厂的淀粉废水属高浓度有机废水,根据《污水综合排放标准》中的要求,确定对废水采用"UASB反应器+活性污泥曝气池+接触氧化池"法进行处理,出水可达到国家规定的排放标准。     

A process integration approach to industrial water conservation: a case study for an Indian starch industry

A case study for water using network of a Starch industry in the state of Gujarat, India, is undertaken with an aim to reduce demineralised water and freshwater flow rates and consequently the wastewater flow rate. The problem was identified as a multi contaminant, reuse and recycle problem. The freshwater consumption and demineralised water consumption were 100 t/h and 51 t/h respectively before modification and the network was dealing with three major contaminants such as total organic content, total dissolved solids and total suspended solids. A program was developed in MATLAB for analysis using Water Pinch. The improved water using network designed for the present work consumed less demineralised and freshwater. The reductions are of the tune of 28% and 64.38% for demineralised and fresh water respectively. Due to alteration in piping, there will be a saving of 406 026 INR per year, which will be utilized for development of efficient environment policy for the company. The entire concept had been implemented on plant level on 1st February-2009 and the reductions are of the tune of 25% and 60% for demineralised and fresh water respectively.     

淀粉接枝改性絮凝剂的制备及对含油废水的应用

选用玉米淀粉与丙烯酰胺为主要原材料,在硝酸铈铵引发下制得绿色天然有机高分子絮凝剂。将制得的絮凝剂用于处理油田含油废水,通过测定处理前后化学需氧量和含油量的变化,考察其絮凝性能。结果表明:反应的最佳投料比确定为淀粉:丙烯酰胺=1:2;反应的投料方式为以液体形式、分多次投加,对含油废水的处理取得了良好的处理效果。     

A Study of Physicomechanical and Morphological Properties of Starch/Poly(vinylalcohol) Based Films

Starch/Poly(vinylalcohol) blends in two different ratios (60:40 and 50:50) were prepared with glycerol as a plasticizer. Films were cast by a solution casting method. One set of films were filled with 10 wt% of unmodified bentonite clay and another set of films were crosslinked with epichlorohydrin in an alkaline medium. The prepared film samples were subjected to X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), mechanical characterization and scanning electron microscope (SEM). Significant changes in the tensile properties were observed depending on the different chemical constituents of the films. The presence of clay and crosslinking with epichlorohydrin were both found to have considerable effect on the morphology and mechanical property of the films. The SEM investigations, XRD analysis and FTIR studies revealed the interaction between the various chemical components of the films.