油漆废水处理工艺改进研究

本文以甘肃某一油漆生产企业为例，分析了油漆生产废水水质、水量特点及隔油-气浮-氧化沟处理工艺存在的主要问题：出水石油类超标、废水可生化性差及氧化沟积泥。提出了强化预处理、增设水解酸化工艺及优化生物处理措施的方案，提高废水的可生化性，使最终出水稳定达标（GB8978—1996一级标准）排放。最后对改进工艺的技术经济可行性进行了初步探索，分析证明改进工艺针对性强、经济合算，适合该企业的废水处理。

STUDY ON THE MODIFICATION FOR THE PAINTING WASTEWATER TREATMENT TECHNIQUE

The paper mainly introduced a paint-producing plant in Gan Su. By making analysis on the quality and quantity of influent and the main problems existing in the paint-producing wastewater treatment technique: oil separation-floatation-oxidation ditch technique,such as oil overrun,wastewater bad biodegradability and the deposition of oxidation ditch sludge,the optimized operations were proposed,for example,improved pretreatment, added hydrolysis acidification technique and enhance biological treatment.Its biodegradability would be improved,and the quality of effluent would meet the first class of the national discharge standard.Finally,the technological and economical feasibility of the improved progress was also analyzed,and improved technique was proved to be right and economic to the paint-producing wastewater.