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Pulsarfeeder's Pulsar Hypo pumps are specifically designed to measure the different concentrations of sodium hypochlorite solution in wastewater. It addresses some of the common problems with this chlorination task, such as steam, heat and spoilage, so it is installed at the Corona del Mar Waterworks (WTP) in California, USA.
The Corona del Mar WTP has a maximum wastewater treatment capacity of 36 million gallons per day (mgd). Pulsafeeder's Pulsa Hypo pump was installed in the water management area to add sodium hypochlorite quantitatively. Most of the 12 pumps are used to disinfect influent water, adding chemicals at 55 gallons per hour (gph). Other pumps dosed sodium hypochlorite quantitatively to the clean and boost stations, feeding 32 gph to the clean well, and sterilizing at 9 gph at the booster station. All pumps are under no more than 100 psi operating pressure and no reports of downtime or failure have been received since the first pump was successfully installed last year. After installing more pumps one after another.
The first pump installed at WTP was an upgraded unit, a Pulsa Hypo pump that was retrofitted from a standard Pulsafeeder Pulsa pump. Mike Alvarado, the site's chief technician, realized he had some standard Pulsa pumps, so he decided to contact Charles P. Crowley, a local Pulsafeeder dealer in the area, about their use of pump equipment to add quantitative sodium hypochlorite. Mike was told that it was highly possible to do the job, and he was pleased that he already had 85% of the pump's components, including the motor and transmission. All that is needed is a little engineering work to ensure that the pump lift meets the parameters required by the mission. A total of six Pulsar pumps were converted into Pulsar Hypo pumps, and Mike ordered six more new pumps.
Previously, Goleta Water District used a peristaltic tube pump to perform the task of adding sodium hypochlorite quantitatively, but the tubing components were not disabled and Mike Alvarado decided to look for an alternative after months of frequent tube changes. He had hoped to use the diaphragm pump again, but to avoid the problem of "gas combination" because this problem usually occurs when the demand is low, and at first they had to give up using these diaphragm pumps because of this problem, instead of using peristalsis Pump.
Liquid chlorine (NaOCl), also known as sodium hypochlorite, or soda ash, is easily spoiled in piping or pumping systems because it releases oxygen and causes the residue to crystallize. If oxygen or steam accumulates in the piping system and reagent head large enough, the compressed gas minimizes the bleed check valve, compromising the performance of the standard reciprocating metering pump, resulting in the need for a re-prime start Pump to work. Several "inflation" effects are exacerbated by several factors, including elevated temperatures, highly concentrated solutions, sunlight / UV, and many other factors. The Pulsafeeder Hypo pump avoids this problem because it is designed to allow the compressed treatment fluid to periodically flush water vapor and liquid through the pump's discharge system. The manufacturer integrated the design with the pump's indenter, eliminating the need for costly bypass systems such as pipes , valves and some accessories, whereas standard diaphragm metering pumps used to perform quantitative additions of sodium hypochlorite usually Use this by-pass system. The Pulsafeeder pump system empties the air generated in the pump system and pump head automatically, improving the self-priming performance of the unit. In addition, the sealed-loop Pulsar Hypo pump system is not open to the atmosphere at any point, thus ensuring that no soda is crystallized.
Mike Alcarado and his colleagues no longer have to worry about going to the factory in the middle of the night to change pumps or deal with inflation problems. The Pulsa Hypo pump is operating normally and it is expected that more pumps and other equipment will be installed in suitable locations within the Goleta Water District in the near future.
Peristaltic pumps for the dosing of aggressive chemicals
520 Series Peristaltic Watson-Marlow Bredel Pump. The two pumps provided by the company have been installed at the South East Wastewater Treatment Plant of Thames Water in Cranleigh, England, where they are responsible for the quantitative addition of ferric chloride.
Thames Water's South Eastern Wastewater Treatment Plant, located in Cranleigh, England, uses ferric chloride as a flocculant to meet Britain's strict Biochemical Oxygen Demand (BOD) regulations and the forthcoming AMP4 standard The rule. To handle this corrosive chemical safely, Thames Water installed two peristaltic pumps at Cranleigh's site. Both devices must withstand chemical attack and aging and still provide accurate, repeatable performance.
Ferric chloride has been used in the wastewater treatment industry for some time but has only recently been used as a flocculant to meet the specified BOD requirements. The aggressive chemical is corrosive and must be precisely dispensed if it is to achieve the desired result. Thames Water selected two 520 UN / R2 peristaltic pumps from Watson-Marlow Bredel for this task.
The 520 Series incorporates a high-power brushless DC motor with a die-cast polyester-coated housing rated IP66 and the manufacturer claims that it is designed for reliability and safety.
520 pumps deliver flow rates from 4ul / min to 3.5l / min, which allow Thames Water to adjust flow rate with +/- 0.1% accuracy.
The manufacturer claims that the pump can be calibrated by weight or volume to ensure accurate measurement. Feedback from the end user is reflected by the pump's own display and there is also a dual analog input to control and measure the speed of the work.
After filtration and removal of small grit, ferric chloride was added to the sewage at the Cranleigh Wastewater Treatment Plant, where ferric chloride was about to enter the first sedimentation tank.
Here, iron undergoes hydrolysis to generate positively charged iron hydroxide, which attracts negatively charged colloidal substances, forming flocs that aggregate into large clusters. In this mechanism, ferric chloride not only reduces BOD at Cranleigh's site but also eliminates heavy metals, larvae eggs, pathogenic substances, suspended solids and jelly. After the process, the sewage continues to flow through the first sedimentation tank, and then into the second and third stages of treatment.
Peter Packham, Process Coordinator, South East Province Sewage Services Division, Thames Water, said: "The primary factor we consider when choosing suppliers is their ability to handle this aggressive material (ferric chloride) and to be 100% reliable ".
Pumps supplied by Watson Marlow Bredel have been in operation for more than six months and so far have not been reported for any faults.
New wastewater treatment plant in Spain and the Netherlands
The ABS AFP submersible pump set is installed at the La Reguerona Wastewater Treatment Plant (WWTP) in Gijón, northern Spain.
ABS Pumps has supplied a wide range of pumps, mixers, submersible mixers and aeration systems to two WWTPs in Spain and the Netherlands.
The La Reguerona WWTP is located in the western part of Gijón, in the Asturias region of northern Spain. It is designed as a wastewater treatment plant with a peak flow of 6m3 / h for 330,000 inhabitants. It processes waste water from the neighboring Carreno region and uses three VUP 0501 0450 / 6-52 vertical submersible propeller pumps with a maximum lift of 12m and a flow rate of 7000l / s. Next to these pumps is a variant of the AFP submersible pumps, which pump any fluid up to 90 m in lift and flow at 11,500 m3 / h. The new unit also features NOPOL® DDS diffusers and a variety of screens, presses and pumps from ABS, which briefly opens and connects to a new exhaust duct to the sea. The recently renovated La Figar pumping station in Gijón will divert waste from one end of the city to the other. It is part of a larger program to improve urban wastewater facilities. It is also equipped with a pump and inflation system from ABS. During the construction of the new La Reguerona WWTP, ABS Bombas SA, a Spanish subsidiary, also had leased pumping equipment to its client, the Asturias local government.
The Netherlands has set up a new water purification plant on the outskirts of Lichtenvoorde. The plant is owned by Waterstromen BV, a subsidiary of a local water authority that processes wastewater from the town's largest tannery, which processes 200,000 leathers annually and increases its production year by year. The new Industriewater Lichtenvoorde CV water purification plant uses equipment similar to the Spanish WWTP, including the ABS pump, the mixer and the mixer, which provide additional capacity to support the continued expansion of the tannery by Koninklijke Hulshof Verenigde Fabrieken BV management.
Sodium Hypochlorite Feed Pump Installed at a California Water Purification Plant Goleta Water District, located south of Santa Barbara, California, covers an area of ​​29,000 acres and supplies water to about 75,000 people using 230 miles of pipe . The local water management area is also responsible for water purification in the area and has recently installed 12 gas treatment metering pumps at their main Corona del Mar water purification plant (WTP) to quantitatively add sodium hypochlorite to purify wastewater.