印染废水毕业设计[共11页].docVIP

印染废水毕业设计 【篇一：印染废水毕业设计】 生物接触氧化法处理印染废水 陈志发（井冈山大学生命科学学院 江西 吉安 343009 ） 指导老师 胡萃 摘 要 本设计是某染棉布厂废水处理设计，污水主要指标为：化学需氧量 cod ：600-800mg/l ，生化需氧量 bod5 ：170-230 mg/l ，色度： 350-500 倍，ph 值：9.5-11, 污水流量为 10000m3/d 。处理后要求达 到的水质标准为：化学需氧量 cod ：100mg/l ，生化需氧量 bod5 ： 25mg/l ，色度： 50，ph 值：6.0—9.0。由于本设计要求出水水质很 高，所以需要进行二级处理工艺。 印染废水成分复杂、色度高、 codcr 高且难降解，对环境造成较大 污染。根据以活性染料为主要染料的针织棉布染色废水的特点，印 染废水处理一般采用生化 — 混凝沉淀法、混凝气浮法，化学氧化及 活性炭吸附法等，但是这些方法存在运行费用较高、不易管理等缺 点，所以拟采用铁粉曝气 /紫外光体系 +水解酸化 +生物接触氧化的方 法。本次设计过程包括了废水处理工艺流程的确定和设计计算，主 要有格栅、曝气沉砂池、调节池、水解酸化池、生物接触氧化池及 污泥处理部分设计，通过以上设计及处理，使废水处理达到排放标 准。 关键词：印染废水；水解酸化；生物接触氧化；脱色 the method with bcoof processing printing and dyeing wastewater chen zhi fa(jinggangshan university jiangxi ji ’an 343009) tutor:hu cui abstract this design is a design to aim at dyestuff wast ewater treatment. its main pollute parameter include: chemical oxygen demand (cod) 600-800mg/l, bio-chemical oxygen demand (bod5) 170-230 mg/l, color 350-500 倍, the value of ph 9.5-11. the water discharge is 10000 m3/d. the treated water is required to reach the following standards: chemical oxygen demand (cod) 100 mg/l, bio-chemical oxygen demand (bod5) 25mg/l, color 50, the value of ph 6.0~9.0 . as the design requirements for water quality is high, so the secondary treatment process will be needed. the composition of dyestuff wastewater is complicated . its chromaticity is high, codcr is high and hard to be degraded by biochemical treatment. that is why it causes serious pollution to the environment. a new treatment process for the rease of dyeing and printing wastewater which consists of mainly of active dyestuff is brought forward. biochemistry coagulation sedimentation, coagulation gas floation chemical l oxidation and activated carbon adsorption are generally used .but the operation cost of these methods is expensive and hard to be managed. so, the method of iron aeration / ultraviolet system and hydrolytic acidification and biological contact oxidation will be used. the design p