Membrane filters can be used for final filtration or prefiltration, whereas a depth filter is generally used in clarifying applications where quantitative retention is not required or as a prefilter to prolong the life of a downstream membrane. Membrane and depth filters offer certain advantages and limitations.
Concrete Hard-standing-When using concrete as a surface to support your new shed, you must ensure that it is level, flat and that it is dry in time for your shed delivery and installation. Here are the basic steps: 1  Using pegs and string, mark out the base area (allow 5 cm extra).
Choose the type of door you want for the shed. Depending on the size of the door or doors you choose, cut a hole in the front of the shed large enough to fit the door. Make sure you measure twice and mark the measurements before sawing into the wood; it is important that your lines are straight.ail them so that the 4-foot side is against the ground. On the 10-foot sides of the shed, you'll need two sheets of plywood, plus a 2-foot section of a third sheet of plywood. Nail the plywood to each of the 2x4s. Line the top perimeter of the walls with 2x4 boards by attaching them to the corner posts.