Types of plate and frame membrane configurations is/are_____ Dead-end Cross flow Both (a) and (b) None of these

The types of plate and frame membrane configurations are Both (a) and (b). This means that both Dead-end and Cross flow are types of plate and frame membrane configurations.

Here's a step-by-step explanation:

1. Dead-end filtration: In this type of configuration, the feed is forced through the membrane. The retained particles accumulate on the surface of the membrane, forming a filter cake. This type of configuration is typically used for batch processes.

2. Cross flow filtration: In this type of configuration, the feed flows parallel to the membrane surface. The retained particles are swept away by the flow, reducing the accumulation of particles on the membrane surface. This type of configuration is typically used for continuous processes.

So, both Dead-end and Cross flow are types of plate and frame membrane configurations.