KOLK WATER CONSULTANCY - Expert in water treatment. We work with engineers around the world. Every day.

Fixed or floating directional mixer Multi-purpose, multi-directional, submerged mixer ideal for general mixing and flow generation; adaptable to many tank configurations. Open, dual helical impeller providing intensive; directional sub-surface mixing pattern with minimal surface disturbance and low power to volume performance 1.5 – 22KW Drive Motors 4 + 6-Pole Speeds, Direct Drive AISI 304/316 or other SS Submersible motor – ip 68 protection High quality, low maintenance motor Robust + compact design – minimal vibration Easy installation + removal Directional mixing + flow generation plus general mixing of lagoons Basins + tanks activated sludge processes vey large surface area reservoirs Denitrification + sbr + asp

Hyperboloid bottom mixer Exceptional mixing performance for both low and high solids concentration solutions. Intensive, low-energy, 360 - degree mixing pattern and totally non-clogging impeller. 1.1 – 30KW Drive Motors 10-42 rpm Geared Drive AISI 304/316 or special SS Fixed Bridge + Floor Mounted High efficiency mixing of basins + tanks Activated-sludge processes Denitrification + sbr Also ideal for deep tanks + high mlss Intensive low energy to volume mixing Totally non-clogging design Minimal noise output Robust design – low maintenance

Floating downdraft mixer Open, two-bladed helical impeller providing intensive radial, sub-surface mixing pattern with minimal surface disturbance and extremely low power to volume performance Turbulent 3D radial mixing pattern 1.5 – 55kW Motor Range 4 + 6-Pole Speeds, Direct Drive Motor AISI 304/316 or other SS General-purpose mixer adaptable to most tank configurations plus applications and easily positioned for various process requirements Simple, robust, and reliable Non-clogging, no sheering action impeller Virtually zero surface turbulence and no aerosols No o2 transfer and easy to install and remove

Floatable - Foam processing The FRMD is used to remove the upper layer of foam, oil or fats. The natural flow within the basin, together with the suction of the pump, attracts the surface of the water towards the center of the FRMD. An adaptable floating weir allows the upper layer to enter the pump and be removed from the basin. The weir and the submersible pump are mounted on a robust floating structure held in place by cables and springs or guiding tubes. Depending on the application and the geometry of the basin, the FRMD can be mounted together with a MIX SL (directional submersible mixer) or MIX-AS (floating downdraft mixer) to help the flow towards the weir. Applicable for removal of oil, fats, bulking + aging sludge, recycling of scum in sludge stabilisation + biogas, SBR and ASP tanks.