For applications with very high sludge or TSS concentrations a larger distance between the ceramic plates is essential to avoid clogging and to mitigate the risk of sludge dewatering, which could damage the ceramic flat sheet membranes. Four different plate distances are available starting from 6.7 mm up to 46.0 mm which allows a maximum cake layer formation of up to 18 mm. Single plate slots can be closed with a plug on the front sides of the module housing.