摘要

本文针对某市新建化工区与其配套的工业污水处理厂进行研究，在分析某市化工区产生的废水水质和水量的基础上，调查研究了针对石化废水中高浓度有机污染物，氨氮和高COD的现行各种处理工艺和方法，并经过对选定的两种工业废水处理方案的优化比选，对两方案进行了技术、经济分析比对，最终确定了某市化工区工业污水处理厂工艺采用污水处理工艺为“匀质调节—混凝沉淀—水解酸化— 一级A/O— 二级A/O—监测消毒”，本工艺主要针对化工区新建石油化工项目产生的废水进行处理，具有投资成本低，处理效果显著、易于维护管理，运行成本较低的特点，能经济，有效的去除废水中的高浓度有机污染物，氨氮和COD_Cr等，使出水水质达到国家《污水综合排放标准》(GB8978—1996)中的二级标准，解决了石化废水中有机污染物难降解的技术难题，并完成了化工区污水处理厂总体设计。本工程建设规模为3万m³/d，占地面积为60200m²，项目建设总投资概算为15022.18万元，单位处理成本为2.61元/m³污水，单位运营成本1.94元/m³污水。并且通过工程效益评估，本工程具有良好的环境效益和社会效益，在确保收费的前提下，可产生良好的、间接的经济效益。本设计研究可对同类型化工区工业污水处理厂的设计提供有意义的借鉴和参考。

关键词化工；工业废水；生物处理；污水处理工艺；污水处理厂设计

Abstract

In view of research that a newly built chemical industrial zone and Supporting wastewater treatment equipments.On the basis of quantity and quality of the water in one chemical industrial zone,this paper investigates and studies current process of high concentrated Organic Pollutants,NH3-N and COD in petrochmical wastewater,and compares two options and selects the optimum plan that adjustment—sedimentation–1

-class A/O–2-class A/O–monitor-sanitizeing.This research subject is treated Petrochemical project wastewater,which is good in stable discharging water,easy maintenance and management and good reliability and practical,which removal efficiency of BOD,COD and SS.This paper has desgined overall sewage treatment plant in chemical industrial zone,and the water quality meets 2-class criteria specified in the Integrated Wastewater Discharge Standard (GB 8978-1996). The selected treatment methods solves the problem that Organic Pollutants in petrochmical wastewater is difficult to Biodegradate and accomplishes the design of sewage treatment plant.The scale of this project construction is 3×104m3/d,covers the area of 13000m2,Rough calculation of investment is 15022.18×104yuan,one Cubic meter wastewater treatment and operation cost 2.61yuan and 1.94yuan.Through benefit evaluation,the project has good environment effect and the social effect.The design study providing reference for similar chemical industrical Sewage treatment plants.

Key words Chemical industry；Industrial wastewater；Biological treatment；Wastewater treatment technology；Design of sewage treatment plant