The following three common activities are the sources of wastewater at mobile concrete batch plants: (1) mix plant operations and clean-up, (2) truck mixer drum washout and (3) external truck wash and oil spray down.

The function of the mix plant is to combine gravel, crushed stone and sand (together known as aggregate), cement, water and admixtures to form fresh concrete. Typically, aggregate is received in bulk quantities by rail or truck. It is stored outside until it is conveyed to distribution bins for feeding into the mix plant.
There are two types of plants, central mix plants and transit mix plants. The central mix plant combines and mixes all ingredients, then loads the fresh concrete in the mixer drum on the truck or into a haul truck. The transit mix plant combines the dry ingredients and then loads the dry ingredients and water into the mixer drum on the truck where the final mixing occurs. A mobile concrete batch plant can perform both types of operations. Wastewater is generated from wash water and associated stormwater runoff from the mix plant (if dry brush cleanup methods are not utilized), truck mixer drum washout and/or ready-mix truck exteriors.
The function of the mixer drum washout activity is to rinse residual concrete from the inside of the truck’s mixer drum or haul truck to prevent it from setting up in the drum. Wastewater is generated from the mixer drum washout activity and associated stormwater. The function of the external truck wash is to clean external surfaces of the ready-mix trucks. Wastewater is generated from the washing activity and associated stormwater.

Mobile concrete batch plants shall utilize one or more of the following options to manage wastewater generated at temporary job sites; offsite wash facilities, temporary total retention surface impoundments, approved recycling methods,
land application for dust suppression, and/or stockpile watering.

For more information, please visit: http://www.queenbrick.com/mobile-concrete-mixing-plant.html
Contact: Ms Queen
Web: http://www.queenbrick.com