|Precision dosing||Can Dry Run||Low Ownership Costs|
|Ideal for abrasive slurries, flocculants or offgassing liquids||No damage if supply line runs dry||Long life, wear resistant hoses can be changed in situ with no special equipment|
Water is a precious commodity, drinking water quality and treated waste water affects health and the environment requiring reliable, forgiving pumps with infrequent servicing - proven features of the Verderflex pump family dosing reagents, transferring sludges or feeding filter presses
Lime, or milk of lime, or kalkmilch is one of the most widely used chemical with excellent pH adjustment properties. It is however, not an easy product to pump, requiring high line velocities whilst being highly abrasive resulting in high rotor and stator rates on conventional pumps.
Excessive nitrate levels in waste water discharges can lead to algae blooms in water courses or "green" water. Treatment with chemically aggressive Ferric Chloride (FeCl3), reduces residual nitrates but variying water inflows add control system complexity with pumps required to operate from near zero flow to maximum operation.
Waste water processes need to verify the quality of the incoming waste stream and use analysers to detect the presence of contaminants or monitor key parameters that impact on downstream operations. Analysers need to be fed with consistent liquid volumes for optimum reporting and subsequent process control.
Chemical & ferric chloride flocculant dosing
Many chemicals are added as water is treated to optimise pH levels for maximum flocculation rates. A very common flocculant is Ferric Chloride (FeCl3), but more complex polymers are also used to combine with solid particles in primary waste water treatment station feeds to form sludge as part of the clarification process. At the end of the treatment process chemicals like Copperas or Ferrous Sulphate (FeSO4), are used for reduction of residual phosphates.
Ferric Sludge Transfer
Ferric sludge is produced after flocculation and is deposited at the bottom of settling tanks forming a sludge blanket. This sludge can be drawn off and transferred to filter presses, where excess water is removed before the pressed sludge is sent to landfill.
Overflow water removal
Many plants have inlet overflow storage ponds that act as a buffer in high inflow conditions. Once the inflow rate falls and the main pond level drops, the spillage ponds are pumped out to transfer the wastewater into the main pond for treatment.
Phosphorous removal Metering Skid System
3 Vantage 5000 pumps are installed on a single “drop-in” skid system to treat fly ash run off water to neutralise high phosphorus residual levels.The first pump precisely doses CaCl2 raising the leachate’s pH level for optimal flocculation by the other two pumps. The flocculants dosing pumps gently to remove the residual phosphorous, avoid costly over-dosing and minimising treatment costs. Each pump is easily controlled using simple 4 to 20mA signals with real time performance feedback and status alarms and the “drop-in” skid minimises on-site commissioning time.
Pumping primary sludge
At a sewage treatment plant in Holland primary sludge is handled with a solid content of 4.5% to 9.5%. The circumstances for pumping this product are severe, making the handling and treatment difficult.
Sludge is often developed in concrete lagoons where it can be drawn off from below. More rudimentary systems require the sludge to pumped from above and demand a combina- tion of high suction and solids handling.
Metering Pumps from Verderflex®
The Rapide R2S Peristaltic tube pumps were selected to replace the existing Metering pumps.
Dura Hose Doses Calcium Hypochlorite
Dura Hose Pump replaces calcium hypo diaphragm pump
3 x Dura 25 with PP flanges replaced problem vapour locking diaphragm dosing pumps Calcium Hypo diaphragm pumps. Sterilisation of water supply is dependent on Hypochlorite being dosed and this water is then supplied to one of Johannesburg‘s largest informal settlements.
Peristaltic Pumps Waste Less in Wastewater Treatment
The City of Eagan in North Minnesota, USA required a pump capable of accurately dosing 15% sodium hypochlorite or ‘hypo’ for their new wastewater treatment plant.
Pumps for the (waste) water treatment industry
Verderflex peristaltic pumps are manufactured in the EU within ISO 9001, ISO 14001 and ISO 45001 accredited facilities.
The Verderflex Dura is a true 2nd generation pump : the first real advance in hose pump technology since the high pressure hose. It combines a close coupled pump's compactness with the traditional long coupled pump's benefits and gains from a total re-design rather than adapting an original concept.
|Max flow||15300 l/h|
|Max pressure||16 bar|
Verderflex® Vantage 5000
The Verderflex Vantage 5000 family is the next generation in precision dosing and dispensing pumps. They combinine accuracy at discharge pressures up to 7 bar with an intuitive, touch screen user interface, a 30 program onboard memory, real time clock and a USB data backup port. Remote control signal options include 0-10V, 4 to 20mA, Modbus® & Profibus® with optional multiple opto isolated volt free inputs & outputs allowing the Vantage 5000 to form the heart of automated, process critical metering and transfer systems for abrasive, off-gassing, chemcially aggressive, shear sensitive or fragile chemicals, nutrients and pH control systems.
|Max flow||6600 ml/min|
|Max pressure||7 bar|
Lubricant-free peristaltic hose pumps. The Verderflex Rollit is a family of lubricant-free, easy to maintain, low to medium pressure hose pumps. Rollits are available as 2 bar, 4 bar or 2 bar Hygienic versions with single or twin head styles.
|Max flow||24500 l/h|
|Max pressure||4 bar|
The original Verderflex peristaltic hose pump series is now solely focussed on high flow applications and includes the widely used VF125, the world's largest high pressure hose pump.
|Max flow||90 m3/h|
|Max pressure||16 bar|
Typically both hose and tube pumps are used as chemical dosing pumps accurately and repeatedly delivering a wide range of chemicals whilst addressing the problems of the liquid:
- Lime is abrasive causing diaphragm pumps to clog due to lime’s viscosity and progressive cavity pumps to suffer from abrasive wear
- Hypo offgases when pumped causing dosing pumps to vapour lock resulting untreated liquid streams
- Polymers are often shear sensitive and progressing cavity pumps reduce the particle size leading to increase chemical usage
- Sludge’s often have a high grit content creating abrasive wear problem for many pumps with rotary pumps suffering from ragging problems on primary sludge.
- Additionally, Verderflex Vantage 5000 pumps can be interfaced with SCADA systems giving easy remote controlled dosing capabilities