Raschig Rings For Wastewaterwater Ammonia Removal

Raschig rings are an effective solution for wastewater ammonia removal from industrial air scrubbers. Their large surface area ensures maximum gas absorption while their shape allows for easy flow and provides improved separation between solids and vapor. Furthermore, their size can be easily adjusted according to specific applications.

The ring design offers an efficient alternative to conventional packing in that it requires less maintenance, is less prone to blockage due to its small gaps and holes, has excellent hydrodynamic properties, can be regenerated through chemical absorption to lower head loss rates and reduce operating costs, and regenerates itself over time through chemical absorption, thus cutting operational costs associated with other packing materials.

For optimal ammonia removal, the surface of a ring must be covered in an amine-containing adsorbent such as powder or liquid form and regenerated using an acidic solution containing calcium ions. Once restored to optimal performance, this recycled adsorbent can either be reused in the process or stored away for future use.

Ammonia can be removed either continuously or intermittently through both continuous and batch processes. With continuous ammonia removal, ammonia is continuously fed into a buffer tank where packed columns under recirculation operation remove as much ammonia from buffer tank concentration as breakthrough columns can handle, with breakthrough columns switching over when effluent ammonia concentration exceeds an arbitrary threshold value defined by various factors.