Sludge Dryer Manufacturer

As a renowned manufacturer, we are committed to reducing your carbon footprint while cutting operational costs and boosting productivity. With years of industry experience, our customized drying solutions cater to your unique needs. 

Municipal Sludge

Municipal Sludge

Our Sludge Dryers are used in the co-combustion of sewage sludge in municipal solid waste plants where the sludge is dried up to 90% dry solids.

Industrial Sludge icon

Industrial Sludge

We supply Sludge Dryers that can process even the most toxic sludge from the ETP regardless of the industry type.


Byproduct Valorization

Optimal post-processing can be conducted from the Agri and Food waste through our Sludge Dryers.

Municipal Sludge

Sludge handling is one of the most complex problems that industries face in today’s world. Municipal, State, and Central laws make it harder for industries to handle the sludge in a way that meets the regulations. With AS Engineers’ Sludge Dryer, after being dried to approximately 90% dry solids, you can achieve the calorific value of your sewage sludge ranging from 1800 to 4500 kcal/kg; depending on its organic content.

You can use this dried sludge as a fuel inside the waste-to-energy plant, and can also be mixed with the municipal solid waste before it is combusted. What you get from combining a sewage sludge drying installation and a municipal solid waste plant is a waste-to-energy process environment for the sewage sludge drying line.

Usually, the municipal solid waste combustion process generates a heavy amount of steam. You can use this waste heat to operate the sewage sludge drying line. Therefore, the sewage sludge drying installation can be operated without external heating sources which significantly reduces the thermal energy costs. In broader terms, it greatly reduces the operating costs for the drying lines that have been installed.

We also offer a model where the exhaust gas volumes are extremely low and they can be treated thermally in the combustion process itself for the sludge drying line. This eliminates any biological or other multi-stage filter for treating the exhaust gas. The condensate that is produced should be discharged into the sewage system or should be treated locally as per the regulations.

Industrial Sludge

Textile Industries: It is one of the major contributors in sludge production today. The sludge from these wastewater treatment plants is often discarded in the environment which exposes it to flooding rainwater that causes soil and water contamination.

Therefore sludge handling for such applications becomes imperative for sustainable development.

With the rapid rise in environment pollution and increased energy consumption, sludge management and sludge drying is becoming an ever-increasing problem. This requires state-of-the-art drying solutions like AS Engineers’ Paddle Sludge Dryer.

For instance, the typical textile sludge having  approximately 80% moisture content has a calorific value of >1500 kcal/kg. The textile sludge/clay mixtures carrying minimal moisture content can be used to make bricks, which are known to have compressive strengths and leaching behavior.

Pharmaceutical STPs: Pharma companies can fuel rapid  environmental pollution by releasing toxic waste into the natural water resources. The hazardous and refractory organic pollutants contained in the sludge, if not handled responsibly, can cause high-levels of soil and water contamination. Pharmaceutical sludge contains relatively high levels of soluble organics, harmful antibiotics, and heavy metals.

Effective wastewater treatment facilities create a large amount of sludge. The disposal cost of this waste sludge is high and handling it is labor-intensive and potentially hazardous. Drying reduces the stream volume by a factor of 4 to 5, minimizing the disposal costs.

Byproduct Valorization

The accumulation and production of sludge in high quantities have a negative environmental impact, which require its treatment and valorization. We have developed a technology that is used in the wastewater sludge treatment called Thermal Drying process. This technology has the potential to produce bioenergy and biochars at a pilot and even at the industrial scale. Biochar can further be used as soil fertilizer or as adsorbent of heavy metals. This could be a part of the wastewater treatment facilities. Methods like pretreatment of raw sludge and co-digestion with other biomass waste have the ability to make the feedstock more accessible to the microorganisms, enhancing the biogas production yield used to power the Paddle Dryer. Our technology carries the potential to produce energy and to minimize the environmental impact in order to attain net zero discharge.

1. Alternate Fuels: Types of sludges varying across processes like municipal sewage plants, textile effluent treatment plants, pharmaceuticals sludge treatment plants, paper & pulp, food industry, can use their sludge as an alternate fuel option in boilers if the calorific value of your sewage sludge ranges from 1800 to 4500 kcal/kg; depending on its organic content.

2. Sludge Brick Making: The sludge can be added to clay bricks with a mass ratio of 1:10 since its strength is comparable to ordinary red bricks, and it contains a certain amount of energy. During the process of firing bricks, it can burn quickly and increase the heat in the kiln.
3. Bio-fiber Board: A series of physical and chemical changes (globulin denaturation) take place after heating, drying, and pressurization under alkaline conditions. Activated sludge resin or protein gel is created by this denaturation and the fibers are huddled together via press plates.

Unseen, Unheard, Unimaginable Cost Savings

Low Operating Cost

Our Paddle Dryers are energy efficient and run on indirect drying technology. This directly results in reduced operating costs.