The invention discloses a treatment method of high COD concentration, high toxicity, low biodegradability and high color alkali residue wastewater. The invention adopts the micro electrolysis pretreatment and flocculation process to reduce the concentration of COD and chroma, and improve the biodegradability, provides a prerequisite for the subsequent hydrolysis acidification and aerobic treatment system to further reduce pollutant residue load, the final effluent discharged after disinfection after sedimentation tanks. The invention is to improve the maximum COD concentration of influent (80000300000mg / L) and chroma (1250050000 times), considering the stability of the system operation, save a lot of dilution water is currently running process, the effluent can be directly discharged into the city sewers, receiving water or incorporated into other systems, but also to meet the reuse standard. During the whole process, no two pollution was produced, and the total amount of COD emission was reduced. The operation of the whole system is convenient, and the investment and operation cost is much lower than the traditional membrane processing system.
【技术实现步骤摘要】
本专利技术属于废水处理领域,尤其涉及一种高效的碱洗废水(俗称炼油碱渣)的处理方法,尤其适合经过缓和型湿式氧化系统预处理后的碱渣出水。
技术介绍
石油炼制工业是以石油为主要原料,通过常减压蒸馏、催化裂化、加氢裂化、延迟焦化等生产工艺转化为石油产品的生产工业,其主要产品有汽油、柴油、煤油、液态烃、润滑油、沥青等。对于高含硫原油二次加工的产品,常常含有浓度比较高的非烃化合物和二稀烃等杂质,致使油品性质不稳定,质量差,需要进行精制。目前我国炼油厂普遍采用碱洗电精制(也称"电-化学精制")法,该法是早期酸碱精制方法的一种改进工艺。所谓碱洗电精制即是用一定浓度的NaOH溶液洗涤油品,在高压电的作用下实现油水分离,洗油碱液循环使用,直至碱液中NaOH低于一定值后排出循环系统。排放掉的废碱液即为碱洗废水,俗称炼油碱渣。目前我国炼油厂普遍采用碱洗电精制(也称"电-化学精制")法,该法是早期酸碱精制方法的一种改进工艺。所谓碱洗电精制即是用一定浓度的NaOH溶液洗涤油品,在高压电的作用下实现油水分离,洗油碱液循环使用,直至碱液中NaOH低于一定值后排出循环系统。排放掉的废碱液即为碱洗 ...
【技术保护点】
一种高浓度碱渣废水的处理方法,包括如下步骤: 1)碱渣废水为湿式氧化出水,碱渣废水进入调节池后进行水量与水质调节后进入微电解预处理系统,微电解处理系统中悬挂铁/碳、铁/铜、锌/铁、锰/铁、铁/银的合金棒作为填料,底部布有曝气系统,填料填充率为30-80%,停留时间为4-24h; 2)经微电解预处理系统后进入混凝沉淀系统,混凝搅拌池分为3格,第一格为pH值调节池,第二格为混凝剂投加段,第三格为絮凝剂投加段; 3)然后经沉淀池出水后进入水解酸化系统,水解酸化系统含有悬浮填料结构,池底选择液下搅拌系统进行污泥搅拌,水解酸化污泥不需要外排,维持兼氧系统污泥浓度为3-5g/L, ...
【技术特征摘要】
【专利技术属性】
技术研发人员:张亚雷,王海峰,庞维海,章明,
申请(专利权)人:同济大学,上海明诺环境科技有限公司,
类型:发明
国别省市:31[]
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