MBBR Retention Screens — Stainless Steel Carrier Sieve Screens
Stainless steel retention screens that keep MBBR carriers inside the reactor while treated water flows out. Cylindrical outlet screens and flat panels, SS304 as standard, SS316 for saline or high-chloride water. Send us your outlet size and carrier model — we size the screen and its open area for your flow.
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Every MBBR reactor needs a screen at the outlet: carriers must stay in the tank, water must leave freely. A screen that is too coarse loses media into the next process stage; a screen with too little open area blinds over and pushes the water level up. We supply retention screens matched to your carrier size and outlet geometry, as cylindrical screens that mount on the outlet pipe or flat wedge-wire panels for rectangular outlets and launders.
Materials and build
SS304 stainless steel as standard; SS316 for seawater RAS, high-chloride industrial wastewater and other aggressive water. Wedge-wire or perforated construction, with the slot/opening size selected safely below the smallest dimension of your carrier so media cannot pass even as it wears. Frames and flanges are built to your outlet dimensions — send a drawing or clear measurements with photos.
Sizing — what we check
(1) carrier model and its smallest dimension, (2) outlet shape and size (pipe diameter or rectangular opening), (3) peak flow through the outlet, (4) water type (fresh / saline / industrial). From these we set the opening size, the screen area and the mounting method, and reply with a drawing sketch and quotation.
Order it with your media
Retention screens are quoted together with MBBR media orders as standard — one less thing to source separately, and the opening size is guaranteed to match the carriers we ship. See our MBBR media range.
Retrofitting a reactor or replacing a damaged screen? Send photos and measurements through our contact page and we will size a replacement.
