Sewage sludge, digested

Kirk, P.W.W., Rogers, H.R., and Lester, J.N. The fate of chlorobenzenes and permethrins during anaerobic sewage sludge digestion, Chemosphere, 18(9-10) 1771-1784, 1989. 

This work, however, did not completely eliminate the controversy over the toxicity of volatile acids. Subsequently, Buswell and Morgan 20) reported that propionic rather than acetic acid was toxic to the methane bacteria. McCarty et al. (9) investigated the effect of various volatile acids on methane bacteria in order to clear up this controversy. They added 6000 mg/liter of acetic, propionic, and butyric acid (the three most common acids produced during anaerobic breakdown of complex substances) individually to laboratory scale sewage sludge digesters. Prior... 

Stages of Sewage Sludge Digestion, Ph.D. Thesis, University of Michigan, 1964. 

Table I compares the predicted shape of the particle size distribution with observations from oceanic waters and sewage sludge digesters. The comparison is limited to the dependence of the particle size distribution on the particle diameter because fluid and particle parameters appearing in the predicted equations were not available. In plots of the logarithm of the size distribution vs. the logarithm of the particle diameter, Equations 10, 11, 12, and 13 become straight lines with slopes —2.5, —4, —4.5, and —4.75, respectively. Oceanic and digested sewage sludge size distributions are also observed to have one or more linear regions in such a plot, as summarized in Table I.

Fig. 7-34. Schematic oi controls on Phjs in ctn anaerobic sewage sludge digester.

Siegrist H., Vogt D., Garcia-Heras J.L., Gujer W. (2002) Mathematical model for meso and thermophilic anaerobic sewage sludge digestion. Environ. Sci. 

Rawn, A.M., Banta, A.P., Pomeroy, R. (1939). Multiple-stage sewage sludge digestion. Trans. ASCE 104 93-132. 

Waste water sludge Sewage sludge Digested sludge... 

Another example highlighting this problem is associated to ICP-MS interferences from residual silicon resulted in up to 30% positive bias in intensities from Cu, Cu, and Mn derived from soil and sewage sludge digests, due to spectral interferences... 

Feedstock (db) Woods Grasses Macroalgae Microalgae Manures Sewage sludge Digestate... 

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