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Sewage sludge was pretreated by using thermal hydrolysis process before anaerobic digestion. The digested sludge (dry-solids of 12%) was thermally pretreated at 121°C with a holding time of 30min. The results showed that both the anaerobic digestion performance of thermally hydrolyzed sludge and treatment efficiency of the system are improved. COD and VS removal rates increased from 37.6% and 28.6%...
Analizowano izotermy adsorpcji pary wodnej oraz wyznaczono wielkości powierzchni właściwej kwasów hu mi nowych i frakcji fu twok wąsów ¡3-humusu. Kwasy humusowe wydzielono z gleby brunatnej kwaśnej, wytworzonej z piasku słabo gliniastego w 4 lata po zastosowaniu osadu ściekowego i wermikompostu w dawkach 30, 150, 600 Mg ha1. Kontrolę stanowiła gleba nienawożona i nawożona obornikiem w dawce 30 Mg...
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