Sand washing mud is a mixed liquid containing a certain proportion of solid particles such as fine mud. Generally speaking, it has the following characteristics:
Appearance: khaki, uniform and sticky, without delamination after standing for a long time (it does not contain fine sand, so it can be extracted by a fine sand recovery machine first), and its specific gravity is 1.20 ~ 1.46 (in which the specific gravity of yellow sand is1.6);
Mud content is 20% ~ 30%, and PH value is 6 ~ 7.
Improper treatment of sand washing mud will pollute the environment, cause a lot of soil erosion, block rivers, affect water quality and destroy municipal facilities.
According to the requirements of People's Republic of China (PRC) Comprehensive Wastewater Discharge Standard, the pollutants involved are "suspended solids":
First class standard: 20 ㎎/L.
Secondary standard: 30 ㎎/l
Grade III standard: 50 ㎎/L.
In order to control the wastewater discharge index to the maximum extent, the following measures should be taken
Designate a special person to manage wastewater and strictly implement the new environmental protection law.
Strict dosing cycle and dosage, regular analysis,
The index should be controlled below 20 ㎎/l, so as to be recycled after clarification, reduce water consumption and save costs.
If it is really necessary to discharge, it must meet the national or local discharge standards to avoid causing pollution incidents and unnecessary punishment.