浅谈油库污水处理工艺

我国沿海港口众多，很多油库每天需要清洗油罐并且定期排放罐内分离出来的含油污水，而油轮需要清理压舱水，其压舱水的含油量最大可达20％，而且油质复杂。含油废水中的含油量，一般为几十至几千mg／L，最高可达数万mg／L。而国家规定的允许排放标准仅为10mg／L。根据含油废水中油类存在形式的不同，通常分为浮油、分散油、乳化油和溶解油四种。含油废水的治理原则：首先应该考虑尽可能多的回收含油废水中的油，对治理过的水，应达到国家《城市污水再生利用城市杂用水水质》GB／T18920—2002标准的要求。

Shallow Discussion on Waste Water Treatment of Oil Reservoir

There are many ports along the coast in our country,and it is necessary to clean oil tanks and discharge the oily waste water separated from blow down tanks on a regular basis in many oil reservoir.Besides, the oil tanks should discharge ballast water,in which the oil content can reach 20%,while the oil content is quite complicated.Oil content in oily waste water usually varies from dozens to several thousands of mg/L,and even tens of thousands of mg/L at maximum.According to the occurrence type,the oily waste water is normally sorted as floating oil,dispersed oil,emulsified oil and dissolved oil.The principle of waste water treatment is such that,first to consider recovering oil from the oily waste water to maximum extent,and the treated water should meet the requirement of Regeneration and recycling of municipal waste water and water quality of municipal domestic water GBfF 18920-2002.