Hello,

Best solution for post frac flowback will the use of dual pod sand filter or sand catcher (cyclonic desander). And both the filter or catcher can be flushed during the job. As plugging of sand in separator will require lot of work for clean-up. For sand filter you will require a high rate pump to flush. Whereas sand cather has a bleed line at the bottom which can be connected to a sacrificial choke manifold. But I would recommend to go for a dual pod sand filter with 100/200 micron mesh size screen