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What is Sludge Dewatering?

Municipal and industrial processes tend to produce a lot of waste. Finding the timeliest, most cost-effective, and most ecologically friendly method of waste disposal can be tricky, but one of the tried-and-true solutions is a process known as sludge dewatering.

Essentially, sludge dewatering is all about minimizing the amount of waste by volume, preparing that waste for efficient disposal. In this post, we’ll provide some insight into how the process works, and also list some of the primary benefits of sludge dewatering. With any questions, don’t hesitate to reach out to our team here at P&H Senesac.

What is Sludge?

Before we get into the dewatering process, it may be helpful to define sludge.

Sludge is basically a semi-solid slurry that can be created as the byproduct of most any industrial or municipal process. Specifically, sludge can often be created during the process of wastewater treatment, before the water can be safely released back into the environment.

How Does Sludge Dewatering Work?

Sludge can be heavy and cumbersome to transport, making effective waste management a challenge. That’s where the dewatering process comes into play. Dewatering is all about concentrating that slurry into a more solid cake. Specifically, sludge dewatering reduces both the weight and volume of waste (as it removes the liquid/water components, leaving just high-solid material). In this form, waste is much easier to transport and dispose of. Thus, waste management is more cost-effective.

What are the Benefits of Sludge Dewatering?

The sludge dewatering process offers a number of benefits. These include:

  • Waste volume is reduced. As stated above, sludge dewatering is primarily about making it easier and more cost-effective to transport and dispose of waste. This is accomplished by reducing both the weight and the volume of that waste, through the removal of liquids and water.
  • Transportation costs decrease. As a direct result of the reduced waste volume, transportation costs tend to be more manageable. Simply put, filling a tanker truck with a heavy, semi-solid slurry and then transporting it long distances can be expensive. Loading light, solid cakes onto a truck can be much less costly.
  • There’s much less risk of spilling or leaking. Something else to keep in mind is that transporting sludge can be a messy business. There is always a pretty high risk of spilling or of leakage. Any kind of mess can be a big problem, especially if the sludge is being transported through a residential area. But the solid cakes created in the dewatering process are consistently dry, averting the possibility of a mess.
  • Wastewater can be recycled. What happens to the water that’s removed from sludge? Because all the contaminants are filtered out of it, this wastewater can actually be recycled, making this an eco-friendly solution.
  • There are plenty of ways to automate the process. Finally, note that the sludge dewatering process can be automated, making it simple and efficient to process large amounts of waste on a regular basis. This is especially true when best-in-class equipment is employed, from a skilled sludge dewatering provider like P&H Senesac.

Learn More About Sludge Dewatering from P&H Senesac

For decades, our company has been at the forefront of sludge dewatering technology, providing centrifuges that quickly and efficiently process large volumes of sludge and wastewater. We also offer rapid deployment, full on-site personnel options, and more. Plus, we are committed to implementing equipment in a way that minimizes your downtime.

Ready to learn more about effective dewatering processes, and about the best ways to manage industrial waste? Reach out to P&H Senesac at your next opportunity.

The Advantages of Recycling Wastewater-min

Industrial processes, including wastewater treatment, tend to result in some wasteful byproducts. For example, these processes often create sludge, a semi-solid slurry that can be difficult to transport for disposal. To assist with the waste management process, industrial facilities often engage in a process called sludge dewatering, which filters out solid waste into concentrated cakes. These cakes are much easier and more cost-effective to get rid of.

The sludge dewatering process also results in wastewater, which is the liquid waste that’s extracted from those high-solid cakes. This wastewater can be recycled, which is one of the main benefits of the sludge dewatering process.

Indeed, there are a number of ways in which wastewater recycling can be beneficial.

What are the Advantages of Wastewater Recycling?

1) Reducing environmental impact.

For example, one benefit of wastewater recycling is that it allows industrial facilities to reduce their environmental footprint.

By implementing large-scale filter press technologies, mining and mineral processing companies can effectively manage mine tailings, dry stacking them instead of using tailings ponds. In the process, this allows mining and mineral processing companies to minimize the risk of leaks, wildlife exposure to contaminated water, and more.

2) Minimizing freshwater stress.

There’s always high demand for freshwater… and sometimes, there’s insufficient supply to meet that demand. For example, agricultural companies and landscaping businesses always need large reserves of freshwater to use in their irrigation processes. During seasons of drought, the freshwater market can be particularly stressed. But recycled wastewater is usually perfectly well-suited to meet this demand.

The bottom line? By reusing their wastewater, industrial and municipal organizations can actually contribute to the world’s freshwater supply.

3) Eliminating water transportation needs.

Recycling and reusing wastewater is considered to be a smart business practice, not a waste disposal liability. Indeed, it can help companies become nimbler and more profitable.

Why is this the case? Well, transporting freshwater to offsite facilities can be incredibly pricey. But many companies have discovered ways to recycle wastewater on-site, and then use that recycled water for their own in-house industrial applications. This eliminates the costly and wasteful need for freshwater transportation.

4) Boosting sustainability.

The term sustainability is frequently invoked, but little understood. Basically, it just means meeting the needs of today without compromising the resources available tomorrow.

Recycling wastewater can be a great way to enhance sustainability. Not only does it allow a way to reuse wastewater for future industrial applications, but it also makes it easier for companies to dispose of solid wastes, rather than leaving them on-site where they can potentially become hazardous.

5) Avoiding regulatory issues and fees.

A final benefit to recycling wastewater is that it can help industries and organizations to avoid expensive non-compliance fees.

Simply put, discharging of waste can be difficult, and failure to do it properly may result in the incursion of penalties. One way to avoid the issue altogether is to simply reuse or recycle liquid wastes on-site.


Learn More About Effective Ways to Recycle Wastewater

There are countless ways in which wastewater recycling can be beneficial, not only in helping organizations to meet their environmental goals, but also in making them leaner and more efficient.

To realize any of these benefits, it’s crucial to have the right technology. That’s where P&H Senesac comes into play. For decades, we have been a leading provider of sludge dewatering technology, including best-in-class centrifuges and beyond. 

We’d love to tell you more about the tools we can provide for effective wastewater recycling. To start a conversation with us, reach out to P&H Senesac at your next opportunity.

anaerobic digester

Every type of anaerobic digester mixing system performs a common role. An anaerobic digestion plant plays a key role in turning wastewater treatment facilities into water resource recovery facilities. They maintain proper conditions for microorganisms that help grow methane. There are several types of anaerobic digester mixing systems and dewatering pump rental services, each performing its function in a unique way for the digester cleaning services. Here, we will discuss some of the methods.

Passive Systems

Under passive systems, there is an existing treatment component into which biogas is added. 

Covered Lagoon

This system is common because a lagoon requires low maintenance as it captures the biogas beneath an impervious cover. There are two cells needed to perform the function effectively. The first cell is covered while the second cell is uncovered. A lagoon is a digester cleaning system as well as storage. The level of liquid in the second cell should fall and rise to form storage; whereas, the liquid level on the first cell should stay constant to aid the breakdown of manure. 

1) Low-Rate Systems

In this system, the manure that flows through the digester is the primary source of creating microorganisms that form methane.

Complete Mix Digester

A complete mix digester is like a tank where manure is mixed and heated with numerous microorganisms. The volume in the digester is displaced with the incoming liquid; subsequently, an equal amount of liquid goes out during digester mixing. The displaced liquid is carried by methane-forming microorganisms.

Plug-Flow Digester

Plug-flow digester works in a similar way as a complete mix digester, that is, the volume in the digester is displaced with the incoming liquid (manure); subsequently, an equal amount of material goes out. The only difference is that the components of the plug-flow digester are thicker and prevent particles from setting to the bottom. 

2) High-Rate Systems

Under high-rate systems, the microorganisms that form methane are trapped into the digester in order to improve their efficiency.

Fixed Film Digester

A fixed film digester is accumulated with materials, including small plastic rings and wood chips. These materials are used to produce microorganisms that form methane. The liquid is passed through the materials to create an outflow. This method is also called anaerobic filters or attached growth digesters. The growth of the materials (that looks like slime) used in anaerobic digester mixing systems is called a biofilm. 

Suspended Media Digesters

In suspended media digesters, microorganisms are sent out in an upward flow. The liquid flow is set and adjusted to enable smaller particles and debris to flow out while the bigger ones remain inside the digester. Some designs also add artificial media for microbes to form a biofilm, such as sand. 


The process of anaerobic digestion is one of the most important components of energy-producing, modern wastewater dewatering treatment facilities. If you are looking for more information or have any queries regarding anaerobic digestion plant or digester cleaning services, please get in touch with us or visit our website. 

Digester Cleaning Services

Digester cleaning is quickly transforming into becoming an established business sector within the digestion industry. Before we get into when you need digester cleaning services, we will understand what anaerobic digestion cleaning is and how it works.

What Is Digester Cleaning?

In many large wastewater treatment facilities and plants, digester cleaning works by breaking down organic waste. The decomposition of the sewage sludge allows the process to produce digester gas from primary or secondary clarifiers. The byproduct (wastewater digester gas) is rich in methane and can be used as an energy source. 

Anaerobic digester mixing systems use a biological process where the microorganisms produce gas by breaking down organic waste. The gasses produced include carbon dioxide and methane. The gas can then be burned like natural gas to produce energy. 

When Do You Need Digester Cleaning Services?

Digester cleaning contractors are usually needed for flood and disaster cleanup when there is a lack of adequate oxidation time, invasion of crustaceans, due to overloading, grit, and trash, or loss of gas recovery. A digester cleaning helps to get rid of grit and debris (rags, hair, sand), which can impact the operations of the digester by preventing the proper digestion process from occurring. Sometimes the grit and debris may not be completely removed with sludge pumps that extract the solids from the digester, and even the ones that get removed may be harsh on the heating and pumping equipment, resulting in higher maintenance costs. Therefore, a digester cleaning service can help to speed up the process and allow the anaerobic digestion plant to operate at its full capacity. 

However, the process of anaerobic digestion can be quite painful for biogas plant operators because it reduces production time, loses some of the biogas, and results in loss of revenue. The process also requires highly trained and experienced professionals who have all of the necessary safety equipment, venting, pumping, and flushing gear to safely and quickly remove all inorganic and organic objects that interfere with the operations of the digester. 

How Does Digester Cleaning Work?

For the purpose of flood and disaster cleanup, digester cleaning uses the help of pressurized water that can dispose of, transport, and remove dirt and other residual solids. Any of the remaining material is then slurred into a semi-liquid form that can conveniently be discharged and removed with the help of pumps. In addition, the trained personnel also have the equipment and capabilities to dewater the removed trash, grit, sludge, and other remains, allowing for landfill disposal. 


It is essential to keep all machines and equipment properly clean and maintained in any field or industry. Any machine or equipment that becomes too dirty could fall into despair and may not function properly. This is why digester cleaning services are required for wastewater plants to ensure that the process of digester does not get hampered in any way. P & H Senesac can serve your cleaning needs for an anaerobic digestion plant and anaerobic digester mixing systems.

dewatering water treatment

Dewatering is the process of extracting liquid from a sludge slurry. Different dewatering techniques are used to carry out the process. These techniques may be used in refineries, wastewater treatment plants, drinking water facilities, and power plants. In this blog post, we will discuss three common methods of dewatering water treatment.

Belt Filter Press

The process of belt filter press is more commonly used when it is acceptable for filter cakes to have high-moisture content. Generally, this process produces about 18% to 25% solids by mass. It is extremely effective when it comes to high-volume wastewater streams – because it is conditional – where a huge production of the average-quality filter cake is acceptable. The belt filter press method is typically used in public wastewater treatment plants. There are different types of sludge dewatering equipment used for the belt filter press. 

The belt filter press system is mostly used for the following:

  • Public wastewater treatment sludges
  • Paper mill sludge
  • River silt


The centrifuge method is used to separate components that have different densities by employing a high rotational speed. The idea of this process is based on buoyancy – an upward force. A component with less density would be suspended above the mixture; whereas, a high-density component would fall to the bottom. This process generally produces about 25% and 35% of solids by mass. 

The primary benefit of the centrifuge method is its speed. Therefore, the process is typically reserved where the main priority is to recover oil, and residual solids’ quality is not much of an issue. Take a look at some of the sludge dewatering rental equipment to better understand the components involved. 

Plate and Frame Filter Press

The plate and frame filter press method use recessed-chamber filter plates that help to extract liquid from solid. In this process, two separate plates are put together in the shape of a chamber. This builds pressure on the slurry and squeezes out the filtrate through the lining cloth that acts as a filter in the chamber. The filter plate cloth collects the filter cake on its surface and drops it down into a horizontal conveyor. 

This process is highly effective and produces filter cake that is about 40% to 70% solids by mass. Plus, it provides cost-efficient disposal and transportation since it produces the greatest solid material content, which makes it even more beneficial. 

One of the advantages of using the plate and filter press process is that it does not require any specific licensing in order to operate the machine. In addition, the products are easy to transport as they are cake-like, stackable solids. Click here to learn more about our dewatering services.


The dewatering process helps to remove sludge from the water. It is the last step for wastewater treatment, and most of the methods used have proven to be very effective. 

Please visit our website or get in touch with us to learn more about dewatering water treatment for wastewater treatment and pump rental services. Our dewatering pump equipment solutions are ideal for commercial or industrial dewatering jobs of any size.