In the separate process, the primary and excess sludge gets thickened separately from the wastewater treatment and is stabilized for 10 to 15 days. To achieve the desired outcome, combustion is typically applied to sludge that’s already been dried.Ĭhemical sludge stabilization involves increasing the pH level of the sludge to about 12 by adding lime to stop biodegradation.Īnaerobic biological sludge stabilization involves stabilizing the sludge under mesophilic conditions, while the aerobic method can take place either separately or simultaneously. Thermal sludge stabilization makes use of heat. The methods are thermal stabilization, chemical stabilization, and biological stabilization, which could be either aerobic or anaerobic. A secondary goal of sludge stabilization involves minimizing the number of pathogens found in the sludge.ĭepending on the intended outcome of the sludge stabilization, one of three methods can be used. Sludge stabilization is reducing the easily-degrading sludge compounds, unstable, and energy-rich compounds found in sludge, as well as the high water content. Since the content of sludge differs by industry, some of it is permitted to enter a municipal sewer network to be treated alongside municipal sludge. Industrial facilities can also produce sludge, fuel factories, paper factories, and food manufacturing facilities. Sludge is called wastewater solids before treatment and biosolids after treatment. Sludge is the main by-product of wastewater treatment, and it’s typically a mix of trace chemicals, food waste, human waste, micro-organisms, and inorganic solids all held together by some water. This helps maintain the environmental flow of water, with the by-products or sludge generating nutrients and energy. Wastewater treatment is the process by which wastewater is treated to make it usable in applications like industrial processes, irrigation, and even recreation. Bulk Storage, Handling and Mixing Systems
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