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Sludge Monitoring & Removal

Sludge is a byproduct that accumulates in sewage treatment systems, and sludge removal is the process used to dispose of this byproduct.


NWIS uses high-quality vacuum trucks with the most innovative features on the market today. In this process, high-pressure water jetting is used to loosen blockage and buildup by propelling ordinary water through various types of nozzles depending on the situation. The heavy-duty hose projects highly concentrated water with reverse and forward jets to clean sewer line walls. Any sludge and debris is simultaneously collected through the vacuum system and deposited into a collection tank. This method lowers the risk of damage to the infrastructure and harm to on-site workers while also offering higher precision and less damage to your collection system. Vacuum trucks are also used to remove solids and debris from sewer systems, lift stations, pump stations, aeration tanks, clarifiers and contact chambers.


Sludge dewatering is the separation of the liquid and solid components of sludge using pump with a polymer injection system and pumping the sludge slurry into a screened dewatering unit. The sludge will flock because of the polymer and be retained by the screens and the clear water will be returned to your system for an easier and more cost-effective removal process. The remaining dewatered sludge will be disposed of at an approved facility. The dewatering process minimizes waste—an overall more cost efficient and sustainable process of disposal.