文档介绍：皮革废水处理工艺的初步设计
(陕理工化学与环境科学学院环境工程专业1101班,陕西汉中)
指导老师:
[摘要]:制革工业生产工段繁多,加工过程中需要添加多种化学品,从而导致废水是一种成分复杂、高浓度的有机废水,主要含有COD、BOD、SS、表面活性剂、Cr6+、S2- 鞣制剂等高浓度污染物,选用科学合理的废水处理工艺尤为重要。本设计以汉中市某皮革厂废水处理为设计对象,设计处理水量为800m3/d,设计进水水质为:BOD5≤2500mg/L,CODCr≤5000mg/L,SS≤3000mg/L,S2-=30mg/L,总铬为20mg/L。本设计采用生物处理法中生物接触氧化池工艺,工艺流程为:进水-格栅-沉砂池-调节池-沉淀池-气浮-2级接触氧化-二沉池-出水,处理过程中产生的污泥通过污泥压缩,污泥脱水,最终形成饼泥外运。工艺简单可靠,操作方便,从而使出水水质达到国家《污水综合排放标准》( GB8978-1996) 中的二级排放标准。
[关键词]:制革废水接触氧化混凝气浮废水处理
The preliminary design of leather waste water treatment process
Li Wen
(Grade 11,Class 01,Major Environmental engineering,Chemical and Environmental sciences Dept.,Shanxi University of Technology,Hanzhong ,Shanxi)
Tutor:Liu Zhifeng
Abstract:For a wide range of the production section of leather industry, the process needs to add a variety of chemicals, resulting in wastewater is high concentrations anics position. Mainly containing high concentrations of pollutants such as COD,BOD,SS,surfactant,Cr, S tanning agents, etc, scientific and rational choice of waste water treatment process is particularly significant. The design of water treatment to 800m3 / d, the design influent quality: less than or equal to 2500mg / L of BOD5,CODcr is less than or equal to 5000mg / L, the SS is equal to or less than 3000mg / L, S2-=30mg/L and total chromium is20mg/L. The design uses biological contact oxidation process of biological the sewage treatment process was designed to be:influent - grid - sand trap - water regulating tank - sedimentation - flotation tank -biological contact oxidation tank - secondary sedimentation tank - process is simple and reliable, and thus resorted to water quality up to the national secondary discharge standard of 'Integrated Waste water Discharge Standard'.
Keywords:tannery waste water ,biological contact oxidation,coagulation,air flotation,waste water treatment
目录
前言 6
1设计任务 7
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