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湖北广济药业股份有限公司是目前世界上最大的维生素B2生产基地，该公司产生的废水属于高硫酸盐有机废水，COD含量高，可生化性差，污水量为2500t/d。目前该公司采用多效废热蒸发技术及压力喷雾技术对高浓度生产废水先进行蒸发浓缩，使废水中的水分和蛋白质及无机盐分离，得到较高浓度（约45%）的蛋白质、无机盐浓浆及冷凝清水（COD约1500mg/L以下），浓浆经压力喷雾干燥系统干燥得到含蛋白质35%以上的蛋白饲料，所得到的冷凝清水与低浓度废水汇合进入硫酸盐还原脱硫+气浮+UASB+CASS处理系统，处理后出水COD小于100mg/L。该工艺处理虽然处理废水效果很好，但是整个废水处理设施投资和运行费用高，先后投资2600万元建成废水处理厂，投资4000多万元建成多效蒸发装置，年运行成本为600多万元。另外该方法能耗高，生物降解时间长，所需构筑物占地面积大，污水处理厂占地面积为7700平方米。净化过程中分离出的蛋白饲料盐含量较高，不能满足市场需要。 [ Last edited by sunxuefei on 2011-1-13 at 09:19 ] |
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sunxuefei(金币+40, 翻译EPI+1): 2011-01-13 15:10:22
| Hu Bei GuangJi pharmaceutical co.,ltd is the largest production base of vitamine B2 in the world,the high sulphate organic wastewater produced by this company has a high content of COD and bad biodegradability, waste water discharge come to 2500t/d.The company uses multi-effect waste heat evaporation and spray pressure technique to treat wastewater at the moment,it’ll separate the moisture and protein in the wastewater so as to get the higher concentration of protein(about 45%), inorganic salt and cooling water(COD content under 1500mg/L),the glair feed with content over 35% will be got by pulp flowthrough the press-spraying dryness system,the cooling water and low concentration water join together and both of them flowthrough the desulfate+ air supporting+UASB+CASS processing system, output water’s COD below 100mg/L. This tecnique has a good effect in treating wastewater except for its high cost,we invested 26 million RMB to build a wastewater-treating factory and another 40 million RMB to put up the device of multi-effect evaporation,the running cost will come to more than 6 million RMB per year. Moreover,this approach needs large energy consumption,the long time for biodegradation and the big floor area,the area of wastewater-treating factory is 7700 square meter.The content of protein feed is high so that it can’t meet the need of market. |
2楼2011-01-13 14:42:28
