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Quantitative Dynamics of Chosen Bacteria Phylla in Wastewater Treatment Plants Excess Sludge After Ozone Treatment

100%

Jurczyk Ł. , Koc-Jurczyk J. , Balawejder M.

tom Vol. 20, nr 3

204--213

Among the waste produced by municipal wastewater treatment plants, the largest technological problem is caused by the excessive sludge, the management of which consumes almost half of the costs of the entire installation. Regardless of the final disposal route, which may be, for example, reclamation of degraded areas, the the sludge derived from a wastewater treatment plant should be firstly subjected to a series of processes aimed at: reducing its volume, improving selected physical properties, recovering energy, rot preventing (stabilization) or eliminating epidemiological threats (hygenizing). These goals could be implemented using commonly known technologies, including: dewatering, liming, thermoconditioning, methanogenesis or composting. One of the alternative solutions is the use of ozonation of raw excess sludge, which, in principle, may lead to the simultaneous resolution of several above-mentioned problems, such as: drainage properties improvement, increase the bioavailability of organic matter for biogas production, as well as the removal of undesirable microorganisms. Confirmation of the hygenizing effects usually requires arduous microbiological methods; therefore, the fast and reliable tools of molecular biology could prove their usefulness in this case. In this study, the possibility of determining the dynamics of selected groups of microorganisms (including changes in total bacteria amount, Proteobacteria, Bacteroidetes, Firmicutes and Actinobacteria) after sewage sludge ozonation, by using the semi-quantitative RealTime polymerase chain reaction (qPCR), wasinvestigated.

Wpływ dezintegracji chemiczno-termicznej na produkcję lotnych kwasów tłuszczowych z osadów nadmiernych

86%

Myszograj S.

2009

tom Nr 7-8

41-43

Research results concerning the influence of thermo-chemical processing of excessive sewage sludge on changes in concentration of organic carbon compounds in obtained hydrolysates, described by such parameters as ChZT, OWO and LKT. Two series of research were conducted, in which samples of excessive sludge (containing 1% sm and 5% sm) were processed in temperatures of 115, 135 and 175 °C, earlier having been alcalized with sodium hydroxide in the dose of 0,4g NaOH/g sm.