Decomposition sulfate respiration

The anaerobic decomposition of organic matter by fermentation, methanogenesis (methane formation) and sulfate respiration is exemplified in Table 3.2. 

FIGURE 5.32 Organic matter decomposition involving sulfate respiration. 

SAFETY PROFILE Human systemic effects by inhalation fibrosing alveolitis (growth of fibrous tissue in the lung), unspecified respirator system effects, and unspecified effects on the nose. Questionable carcinogen with experimental carcinogenic data. Long considered a nuisance dust (depending on silica content). When heated to decomposition it emits toxic fumes of SOx. See also CALCIUM SULFATE, CALCIUM COMPOUNDS, and SULFATES. 

Sulfur reduction is the major form of microbial respiration in salt marsh sediments. However, it is difficult to estimate with precision what percentage of respiration is mediated by sulfate reduction, since total respiration and aerobic respiration are both poorly known in salt marsh sediments. The estimates on the percentage of total microbial respiration that is mediated by sulfate reduction are based on the comparison of measured rates of sulfate reduction with estimates of inputs and the decomposition of organic matter in these marsh sediments. Unfortunately, the inputs of organic carbon to marsh sediments are not easily measured and not well known. 

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