What are the wastewater treatment methods in concrete mixing plants?

The wastewater generated by the tank washing truck in the concrete mixing station, the wastewater in the ground pump, the wastewater separated from the sand and gravel separation, etc. all need to be treated. These wastewaters contain a large amount of sand, stones, and additives. If they are discharged at will, it will cause unpredictable harm to rivers and land. Therefore, the wastewater generated in the concrete mixing plant must be treated. At present, secondary, tertiary and quaternary sewage treatment systems are generally used for wastewater treatment in mixing stations.

Main station wastewater treatment: There will be slurry dripping when the main station is unloading, so drains should be built at the bottom and around the main station to collect slurry or rainwater into the slurry pool.

Slurry water treatment such as sand and gravel separator: the slurry water after washing the concrete transport truck passes through the sand and gravel separator to separate the slurry water and sand and gravel. The sand and gravel accumulation is recovered after exposure to the sun. The slurry water enters the No. 1 slurry pool through the sewage pipeline. There are a total of 4 slurry pools and 3 clarification pools. The four slurry pools are equipped with surface protection fences and mixers. No. 1, 2, and 3 sewage pools are equipped with mud-type water pumps. No. 2 and 4 sewage pools are equipped with liquid level gauges. Each of the three clarification tanks has a sewage-type water pump. The mixer in the pool rotates periodically to maintain uniform water quality.

How to use the treated mixing station wastewater:

Use 1: The secondary clean water in the sewage tank can be used to clean the concrete transport trucks and separate the sand, gravel, mortar, etc., and the sand and gravel are returned to the material yard for accumulation, and the cement slurry is entered into the sewage tank for re-cleaning;

Use 2: You can use clean water from the clear pool to mix concrete below C30.