Corrosion in the sanitary sewer system occurs when H2S is biologically converted to sulfuric acid by Thiobacillus bacteria. Although reducing metals was necessary to protect public health, pretreatment has contributed significantly to increased sulfides, leading to heightened H2S odor and ultimately to accelerated corrosion. Magnesium hydroxide is effective in eliminating H2S by reducing both dissolved sulfide production and headspace H2S gas, but it also offers additional benefits as well. For example, the introduction of magnesium hydroxide does not lead to the formation of additional unwanted sludge, as often happens with lime and iron salts. Additionally, it provides long-lasting alkalinity, slowly dissolving to increase the pH of the water to an optimum pH range that significantly reduces the formation of H2S and prevents further corrosion of sewer lines. Magnesium hydroxide's pH buffering ability provides effective treatment for miles downstream from the addition point thus reducing the number of chemical injection points needed.

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• Martin Marietta

• Magnesium Hydroxide

• Analysis