皮革废水处理工艺的初步设计说明

皮革废水处理工艺的初步设计雯（陕理工化学与环境科学学院环境工程专业 1101 班， 723000）指导老师：智峰[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。本设计采纳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 wastewater treatment process Li Wen(Grade 11,Class 01,Major Environmental engineering,Chemical and Environmental sciences Dept.,Shanxi University of Technology,Hanzhong 723000,Shanxi)Tutor:Liu ZhifengAbstract: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 of organics with complex composition. Mainly containing high concentrations of pollutants such as COD,BOD,SS,surfactant,Cr, S tanning agents, etc, scientific and rational choice of wastewatertreatmentprocess is particularly significant. The design of water treatment to 800m3 / d, the design influentquality: 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 usesbiological contact oxidation process of biological treatment.And the sewage treatment process was designed to be:influent - grid - sand trap - water regulat...