设计说明书：淀粉是一种很重要的工业原料，它的用途很广泛。生产过程中，需水量很大，废水排放量也大，而且废水都是含大量淀粉、蛋白质、糖类、脂肪等有机物的髙浓度有机废水，如不加以处理直接排入水体中，将造成水体缺氧，使水生动物窒息，给环境带来极大的危害。废水。在工业制造当中，淀粉的用途非常广，不仅能够作为食品加工的原料，还可以用在造纸工业、医药行业、机械领域等。 

通过在玉米淀粉废水处理工艺及调试运行等方面的研究，通过某一玉米淀粉废水的相关资料和数据，开展废水处理毕业设计，综合运用所学理论知识，结合各种工程规范和要求，独立完成废水处理的工艺设计。

本课题选择UASB+SBR的工艺流程，因流程简洁，节省运行费用。本次设计水量为5000 m3/d，进水水质是COD=3500mg/L、BOD=1000mg/L、SS=500mg/L、PH4-6。而出水指标为COD小于100、BOD小于30、SS小于30、PH6-9.

废水流过格栅，先去除大的悬浮物，然后进入集水井，集水井的废水泵入气浮池提取蛋白饲料，湿蛋白饲料经烘干制成干蛋白饲料。气浮分离后的废水流入调节沉淀池，以调节水量并沉淀去除部分悬浮物。厌氧生物处理采用UASB技术，调节沉淀池废水用泵压入UASB进行厌氧生物处理，大部分有机物在UASB反应器中降解，反应过程中产生的沼气经水封罐、三相分离器、脱硫器处理后进入沼气储柜进行利用。UASB出水自流进入预曝沉淀池，预曝沉淀池是厌氧处理单元和好氧处理单元之间的重要构筑物，其功能主要是去除厌氧出水的悬浮物和H2S等有害气体，增加水中的溶解氧，为好氧处理创造有利的条件。好氧生物处理采用SBR技术，预曝沉淀池的出水自流进入SBR进行好氧生物处理，以进一步降解水中的有机物。调节沉淀池、UASB、预曝沉淀池、SBR等处理单元产生的污泥排入集泥井，集泥井中的污泥泵提升至污泥浓缩池，污泥经浓缩后进入污泥脱水间进行机械脱水，产生的泥饼作为有机农肥外运。污泥浓缩池的上清液和污泥脱水间的压滤液排入集水井进行再处理。71083

由于此类废水对环境的危害性很大，不能直接外排，必须对各工艺废水集中后进行处理，达到国家二级标准后才能排放。

本毕业设计包括计算、图纸、工程概算，会根据理论配合实际调查情况而确定。

毕业论文关键词：玉米淀粉废水、SBR、废水处理工艺、生物处理

Treatment process design of wastewater from corn starch plant Graduation design manual ：

Starch is an important industrial raw material and has a wide range of uses. In the production process, need a large amount of water, wastewater emissions, and waste water is containing a large amount of starch, protein, carbohydrate, fat and other organic compounds in high concentration organic wastewater treatment, such as not to be directly discharged into the water, will cause water to aquatic animal hypoxia, asphyxia, bring great harm to the environment. Waste water. In industrial manufacturing, the use of starch is very wide, not only can be used as food processing raw materials, but also can be used in the paper industry, pharmaceutical industry, machinery and other fields.

This topic through research in process and operation and other aspects of the corn starch wastewater treatment, through the relevant data of a corn starch wastewater and wastewater treatment data, to carry out the graduation design, the integrated use of the theory of knowledge, combined with various engineering specifications and requirements, independently complete the process design for wastewater treatment.

This topic selects UASB+SBR process flow, because the process is succinct, saves operating cost. The design water quantity is 5000 m3/d, the influent water quality is COD=3500mg/L, BOD=1000mg/L, SS=500mg/L, PH4-6. The effluent index of COD is less than 100, BOD is less than 30, and SS is less than 30, PH6-9.