With tough sludge pumping applications like those found at municipal Wastewater Treatment Facilities, (WWTP’s) having the right primary sludge pumps can help reduce hassles and your spare parts budget down the road. This was just the case for the City of Meridian’s recent wastewater treatment facility upgrade and expansion in Meridian, Idaho.
As many know in the wastewater treatment industry, anaerobic digesters play a key part in biodegradable waste and sewage/sludge management. Many digesters, especially in northern areas of the USA are going through extensive refurbishment or replacement in recent years due to aging infrastructure and population expansion. Climate changes in the Northeast has also played a role in nudging local government to invest in sewage treatment pumping equipment as unpredictable storms can overload the system. New processes in the industry such as screens, grinder pumps have also helped to spur investment in new infrastructure.
Types of Digester Pumps
Plunger pumps, rotary lobe pumps, progressive cavity pumps and double disc pumps are the most common types of digester pumps. These technologies have all been around for decades, but plunger pumps remain one of the preferred pump technologies available to pump municipal sewage, food processing waste and more. One of the primary reasons for this is that as most operators know, sewage can be unpredictable in terms of grit content, thickness of the slurry or presence of solids or stringy material (common in municipal sewage) A plunger pump uses a cylinder to force the liquid from the suction to the discharge side of the pump. Rotary lobe pumps and progressive cavity pumps tend to use complicated engineering to transfer sewage which can clog up the pump which then needs to be disassembled and rebuilt. Plunger pumps are designed to handle variations in sewage and solids and they almost never clog. The only downside to these pump is that they are really not meant for straight water applications.
Who is Involved in Selecting Anaerobic Digestion Pumps?
Typically the city, town or municipality hires a consulting engineering firm to make recommendations on the types of pumps needed. Often, facility staff is valuable in contributing to the future of the new facility because they have seen which pumps work and those that have had problems. Pump manufacturers are also valuable partners in the selection process because they too have project experience and can help the consulting engineer save time and money in planning for the new pumping equipment.
Check out a project recently completed for the City of New York’s Hunts Point WPCP in the Bronx, NY. This case study shows a typical anaerobic digestion pump in action. More information is also available at Wastecorp.com
You name the tank that needs to be pumped out and we have heard of at least a few customer applications that correspond with that tank. Underground septic tanks, lagoon transfer, transport truck tankers, locomotive tankers, waste pits and waste vegetable oil drums are among the most popular. What you have to keep in mind is that in most of these applications, you will need a pump that can easily maneuver in areas to access the discharge valve or at least some place where you can place the suction hose.
Randy K. from Columbus, GA, contacted Wastecorp about his settling tank pump out operation:
“I Need assistance to find the correct pumps to transfer mud consistency wastewater, brackish water and abrasive media out of settling tanks at a mining application we have. We have a need for three or four pumps that need to be mobile. We have been told that a diaphragm pump with check balls might work. The pump also needs to be able to handle gritty waste water and slurry. We are pumping up around 8-10’ and pumping out vertically to a screen another 60’ What do you recommend?” Randy K. Columbus GA.
Well Randy, it has long been known in the pump business that when you have a variety of media to pump, your pump must be versatile. The Mud Sucker B Series Professional diaphragm pump is one of those products. Take the Mud Sucker® 3B Series you see in the photo above. This is being transported around a six mile long public space along New York City’s West side. This Mud Sucker pumps everything from septic waste, cleaning up construction wastewater containing aggregate, waste vegetable oil from City operated restaurants and more. The check balls help to manage the solids and if something should get stuck in the pump you simply unbolt the valve covers, remove the check ball, find the blockage and you’re back in business. This is like a 5-10 minute process.
The Mud Sucker® B Series can pump up to 80 GPM and transfer fluids up to 300’ vertically so you will have plenty of pumping power. Keep in mind, that as wastewater gets thicker these values can vary. The pump you see above is shown with an off road utility trailer that we manufactured for the client’s needs. This is a heavy duty trailer but adapts to the tight New York City spaces that the pump must maneuver through. The best part is, we can manufacture these pumps and trailer systems specifically for your needs with hose bins, lockable storage containers and tanks for waste water collection and fresh water distribution. More information can be found at www.wastecorp.com or by calling 1-888-829-2783.
We have noticed that when a double disc pump for a WWTP upgrade or expansion goes to the planning stage and/or bid stage, we get calls from consulting engineers saying that the competition or their pump distributor make misleading or incomplete statements about double disc pump competition. What it boils down to is trying to eliminate competition. In America, we call this an attempt to create a monopoly. History has shown that monopolies are seldom good for competition in the pump business or any other business for that matter. History has also shown that monopolies in the United States aren’t looked at favorably by either regulators or the public. Continue reading
One of the trending customer requests this past year is custom diaphragm pump stations equipped with control panels and mobility options. To give you an example (and some ideas for your own pump application), one of our customers who happens to be one of the largest snack food producers globally, contacted Wastecorp’s engineering department asking for design proposals for a 3″ diaphragm pump out system complete with a mobility kit and the ability to directly control the pump operation. The diaphragm pump unit needed to be manufactured to maneuver easily on the factory floor aisles with custom dimensions. The pumps travel throughout the facility transferring chocolate based waste slurry and vegetable oil residues.
Look to the left and this is what our pump engineers came up with. This is the 3FA-EC diaphragm pump control panel model with e-stop, push bottom start and a specialized float system which detects when the pump should begin operating and automatically turn off. The customer ended up ordering 10 units for other facilities. The best part of this case study is that Wastecorp and our customer are in constant contact reviewing the benefits of the pump system and making design changes for future facility needs. We work one-on-one for custom results and constant improvement.