Whether sewerage is acidic depends on its age and composition. Fresh sewage is typically slightly alkaline, but as it decomposes, it can become acidic.
Here's a more detailed breakdown:
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Fresh Sewage: The pH of fresh sewage usually ranges from 7.5 to 9.5. This means it's slightly alkaline (basic) rather than acidic. The exact pH depends on the specific constituents and their proportions within the sewage.
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Septic Sewage (Old Sewage): Over time, bacteria break down the organic matter in sewage. This process produces acids, which lower the pH. As a result, old or "septic" sewage tends to be acidic. The longer the sewage sits, the more acidic it generally becomes.
Therefore, the answer isn't a simple yes or no. Fresh sewage is typically alkaline, while older, septic sewage is often acidic.