For the bituminous coal of sewage treatment in the clean gas station can be divided into three stages:
1, The pretreatment:
In the process to remove the water containing mainly from most of the suspended solids, oil and colloid.Make washing by
turbid water clarification, but at the moment, there are many organic compounds and inorganic dissolved in water.
2, Removing phenol treatment:
Will be the most phenol substances in the water and organic matter removal.At this time with a small amount of phenol in
water and organic and inorganic.
3, The depth of the dephenolizing process:
Residual water phenol removal, further to the phenol content below 0.5 mg/l, meet the national discharge standard.Deep
purification can be reach by biochemical treatment method.Before and after the three stages of processing is connected,
only in the completion of a phase, then after a stage of processing, without going through the first stage, and apply
directly to the second and the third stage will not work in the process, but now some do not use top processing units,
and with more than 10 to 20 times dilution water dilute wastewater directly into the third stage after the treatment,
also have a plenty of after pretreatment, diluted directly without the second stage to enter the third stage depth
dephenolizing process, of course, all of the above two methods of processing effect is not as good as one, two, three
phase sequence and into the processing method. |