焦化废水处理研究

Study on different treatment of the coking wastewater

用TiO2光催化氧化法和混凝沉降法分别对经生化处理的焦化废水进行了实验研究。研究表明,在光催化氧化法中,CODcr去除率最高可达55.4%,浊度的去除率最大为40.9%,用矿渣复合混凝剂对其进行混凝沉降实验,由水渣和硫铁矿渣分别用硫酸和盐酸搅拌浸取制得1#、2#和3#、4#混凝剂,4#对焦化废水CODcr去除率和浊度的去除率相对1#、2#、3#是最好的,分别达到了36.7%和70.8%;而1#和2#混凝剂,其脱色效果最好。

In this paper,the coking wastewater treated by bio-chemistry method was investigated by nanometersized TiO2 photocatalytic oxidation and coagulative subsidence.The experiment showed that the CODcr removal efficiency was 55.4% and the turbidity removal efficiency was 40.9% in the photocatalytic oxidation. The coking wastewater was treated by the dreg complex coagulants in the coagulative subsidence experiment. The dreg complex coagulants 1#,2#,3# and 4 were made by the water dreg and the ferric sulfide dreg with H2SO4 and HC1 through stirring and soaking.Compared 4 to 1#, 2# and 3#,it was found that 4# was the best,with CODcr removal efficiency and the turbidity removal efficiency,as 36.7% and 70.8% respetively. However 1# and 2# coagulant,was the best in the effect of decolour.