Biotechnological solution for high organic load municipal/industrial

Abstract

Wastewater treatment technology based on aerobic granular activated sludge SBR systems for high organic load wastewaters. Scope: wastewater treatment plants (especially for industrial wastewater with high organic load). Overview: Experiments have shown that the formation of granular sludge under aerobic conditions is possible and seems a promising technique for wastewater with high organic load and / or potentially toxic substances. The granule size is in close correlation with the size of the anoxic area and thus directly proportional to the intensity of anoxic/anaerobic processes. The aerobic granular sludge obtained proved adaptability and stability in terms of high pollutant concentrations removal, successfully removing, in less than 8 hours concentrations of up to 3 g /L of phenol and overall organic load in the reactor. Aerobic granular sludge microbial structure is dense and strong, as defined, smooth, regular and clear outer surface; The granules are visible as separate entities in the mixed solution, both in the mixing and settling stage; The system has a high capacity of biomass retention and tailing; It is able to withstand high flow rates; can withstand high organic loading rate; It is less vulnerable to the toxic organic compounds from wastewater than the sludge in suspension. Excellent settling ability simplifies the separation of the treated effluent from the aerobic granular sludge. By the application of correct hydrodynamic selection factors, the biomass from an aerobic sequentially batch reactor (SBR), has succeeded in the development of aggregates of microbial origin with a granular structure which has turned out effective and stable in treating wastewaters with high shock loading and toxic substrate (phenol) .