40000t╱d印染废水深度处理工程初步设计.docVIP

XXXX大学本科毕业设计 40000t/d印染废水深度处理工程初步设计 Preliminary Design o Treatment of Dyeing Wastewater with a scale of 40000 t/d 学部（学院）XXXXXXXXXX学部环境学院 专 业 环境工程 学 生 姓 名 XX 学 号 2008XXX 指 导 教 师 XXX 评 阅 教 师 完 成 日 期 2012.5 XXX大学 XXX University of Technology 摘 要 随着科学技术的不断进步和发展与环境保护需求的日益增加，相应的环保标准也愈发严格。本设计针对XXXX某纺织集团的一期污水工程进行扩建，对一级出水进行深度处理，使得二期工程出水能够满足《城市污水处理厂污染物排放标准》（GB/T 18918-2002）一级A标准，以对中水进行回用。其中一部分中水作为景观环境用水，一部分作为其新上的造纸业务的工艺用水，节约成本。 针对该印染废水水量大，色度高，可生化性较低的性质和出水要求较高的特点，本设计采用臭氧+曝气生物滤池的工艺对其进行处理。臭氧接触工艺作用是对污水进行预处理，去除大部分色度和将大分子有机物氧化成小分子有机物，提高废水的可生化性，便于后续BAF的生化单元处理。设计时在臭氧单元后面加集水吹脱池，对污水中参与臭氧进行空气吹脱，防止残余臭氧损伤BAF参与生化反应的微生物，使出水不达标。 关键词：；；臭氧；曝气生物滤池 Preliminary Design o Treatment of Dyeing Wastewater with a scale of 40000 t/d Abstract With the development of science and technology and increasing of environmental protection needs, the relevant environmental standards are getting more and more strict. It makes many wastewater treatment plants unable to meet these new standards. This design is to upgrade the present engineering and facilities of a dyeing wastewater treatment in XXXX to meet the first class of Discharge standard of pollutants for municipal wastewater treatment plant (GB/T 18918-2002). The outlet water will be recycled to use for the relative industrials in the local. According to the features of the wastewater, namely a great amount, high chromaticity, and low biodegradability, a process coupling ozone with biological aerated filter (BAF) technology is applied in this design. The ozone technology has high performance in color removal and in decomposition of the complex organic matters into small ones, accompanied with increasing of biodegradability of wastewater, which is favorable for the further treatment in the BAF. An air stripp