Each and every company spend huge sum for giving training for their employees. In-house, external, local, foreign training is given to employees to improve their skills, capabilities, professional experience, etc. 
But actually are those trainings effective? do those trainings improve the organization's profitability? 

After processes like the above, a large quantity of water is collected as waste water which should be treated before reuse of released to the environment.

Therefore, a ceramic factory is always equipped with an Effluent Treatment Plant which process the waste water and produce clean water. The process also create a solid sludge extracted from the waste water. After a sedimentation and a filter pressing process, the sediments are collected as lumps, which some may use the name "ETP Cake".