DRUM FILTER: Rotating micro screens are an alternative to primary sedimentation and so have been more commonly installed at farms in recent years. These usually comprise a fine mesh screen (often 60–200 mm pore size) in the form of a rotating drum or disc through which the wastewater is passed. Particles held back on the mesh are backwashed or scraped, to a waste collection trough. Rotating micro screens are especially suited to applications where blockage is likely, and so are used in fish farms because of the large flow of wastewater which must pass through the screen and the small screen pore size which is required to separate out the solids. Water volume: DRUM FILTER (UP TO 50 MICRON) MODEL DRUM S AREA sqm DAI IN SS in mm LENTH in mm POWER IN KW FLOW/HR PP-DRM-S0105 0.753 400 600 0.37 0 - 5 CUM PP-DRM-S0610 1.0 400 800 0.37 6 - 10 CUM PP-DRM-S1218 1.57 500 1000 0.37 12 - 18 CUM PP-DRM-S2025 1.88 500 1200 0.37 20 - 25 CUM PP-DRM-M3035 2.67 700 1200 0.37 30 - 35 CUM PP-DRM-M5065 3.40 900 1200 0.75 50 – 65 CUM PP-DRM-M7585 4.1 1000 1300 0.75 75 – 85 CUM PP-DRM-L1020 6.03 1200 1600 0.75 100 – 120 CUM PP-DRM-L5075 7.04 1400 1600 1.10 150 – 175 CUM PP-DRM-L2025 9.42 1500 2000 1.10 200 – 225 CUM PP-DRM-L3032 11.74 1700 2200 1.5 300 – 325 CUM PP-DRM-L4550 15.70 2000 2500 1.5 450 – 500 CUM