Since this is an industrial ...

Since this is an industrial application, it may be quite different than municipal wastewater. To prevent clogging, the first thing is to have a good pretreatment. Some Industrial wastes may not need any, some may need a lot. This is especially true if you are dealing with grease. There are a number of things to consider, also. The media size. The plastic media offers more area for the microbes to attach and may be a good alternative to rock. The TSS may actually increase at the effluent to a trickling filter due to sloughing of the microbes. Therefore a settling tank or clarifier is needed afterwards. These should settle vey easy and only require 3-4 hrs of detention.