UASB/ 接触氧化/ 混凝沉淀工艺处理水果、蔬菜脱水废水摘要:针对水果、蔬菜脱水废水的水质特点,采用 UASB/ 接触氧化/ 混凝沉淀工艺,通过介绍调试中污泥的培养与驯化, 分析运行中遇到的问题, 提出了影响工艺调试的因素及相应的控制措施。实践表明: UASB/ 接触氧化/ 混凝沉淀工艺的出水水质达到了国家《污水综合排放标准》( GB8978 — 1996 )中的Ⅱ级标准。关键词:水果脱水废水蔬菜脱水废水 USAB 接触氧化混凝沉淀 Fruit and vegetable wastewater treated in the process of UASB, biocontact oxidation and coagulation. Abstract : Basing on the characteristics of fruit and vegetable dewatered wastewater, the process of UASB, biocontact oxidation and ulation is adopted. By introducing the sludge cultivation and adjustment in missioning, and analyzing the problems during operation, factors which may affect missioning are raised, as well as the related control measure. Practice shows that effluent wastewater treated by UASB/ biocontact oxidation/ulation process has been up to the Ⅱ grade of Integrated Wastewater Discharge Standard of The People ’s Republic of China(GB8978 — 1996) . Keywords : Fruit dewatered wastewater 、 Vegetable dewatered wastewater 、 UASB 、 Biocontact oxidation 、 Coagulation 、一、概述某食品公司主要从事温带水果脱水和蔬菜脱水加工, 两种产品的主要工艺流程为: 水果加工: 原料→去皮、清洗→蒸煮→糖浸→干燥蔬菜加工:原料→清洗→挑选→切割→药剂处理→干燥废水主要来源于清洗、蒸煮、糖浸等生产工序,以及地面和设备的冲刷、清洗用水。二、水质、水量设计水量: 300m3/d ,设计水质见表 1。表1 设计进出水水质 The quality of influent and effluent of device 序号名称 CODcr ( mg/l ) BOD5 ( mg/l ) SS ( mg/l ) pH 1 进水≤ 6000 ≤ 3500 ≤ 800 4~5 2 出水≤ 150 ≤ 30 ≤ 150 6~9 三、工艺流程及流程简述针对此废水有机物浓度高,可生化性较好的特点,选用以“ UASB+ 生物接触氧化法”为主,絮凝沉淀为辅的处理工艺, UA
