sewage rate

Because of domestic sewage, industrial sewage emissions reduce the utilization rate of water resources.

由于生活、工业等污水经处理后大量排放，降低了水资源的利用率。

Sewage treatment technology has not been widely used, sewage treatment rate is low, large amount of untreated sewage flood into rivers, lakes, the sea, causing serious pollution.

污水处理技术没有得到普遍应用，污水处理率低，大量未经处理的污水排入江河湖海，造成了严重的污染。

For natural water and printworks sewage the coagulation behaviors of PMC overmatched the traditional flocculants PAC and PFS ( polymerized ferric sulphate) in the speed of coagulation, decoloration rate and removal rate of suspended substances ( SS).

对天然水体和印染污水的对比絮凝实验表明，PMC絮凝剂的絮凝速度、脱色率和悬浮物去除率均高于传统絮凝剂PAC和PFS（聚合硫酸铁）。

The results showed that most of the SS could be removed from the secondary effluent of sewage treatment plant by direct filtration process, with dual medium of ceramic granules and sand, at 5.2m/h flow rate. The filtration period was about 61.2-72.1h.

结果表明，采用陶粒&石英砂双层滤料的滤柱，在滤速为5.2m/h时，通过直接过滤即可将污水处理厂二级出水中的悬浮物几乎全部去除，且过滤周期可达61.2～72.1h。

The optimal composing of Sol-gel system, daubing times, calcining heat and heat preservation time are experimented in order to confirm optimal technics for dealing with organic dyestuff sewage. Decoloration rate reach 92%.

通过实验确定了溶胶&凝胶体系的最佳组成，对涂膜的次数、煅烧温度、保温时间等因素进行实验，确定了涂膜的最佳工艺，并用于处理有机染料污水，脱色率达92%。