In biological wastewater treatment technologies the majority of the systems are based on activated sludge technology. In these systems the population structure and dynamics of the activated sludge microbial community is largely governed by indirect regulatory mechanisms, such as the aerated/non-aerated reactors, reactor configurations and sludge recycling ratios. The development of polymer gels provides opportunities to fabricate microscopic size bioreactors for wastewater treatment. PVA-PAS (polyvinyl alcohol- polyacrylic acid copolymer) polymers proved to be effective. The primary object of our analyses is to study the nanotechnologically constructed micro-reactors in MBR systems. In this paper a case study is presented where the operational problems of artificial flocs in an MBR system were investigated.
Assessing wetland state through monitoring is the condition of their protection. Wetland resources support healthy environments; communities, and economies, effective watershed management should include conservation and restoration of wetlands and their functions. This study focuses on the development and implementation of a monitoring system for one of the greatest floodplain area: Gemenc-Béda-Karapancsa in accordance with the Water Framework Directive requirements which measures the environmental effects of changing environmental conditions in the Danube’s main river channel due to certain rehabilitation works, via monitoring of surface and groundwater hydrology, water and sediment chemistry and ecological state of the aquatic ecosystem elements.
Authors:Dániel Benjámin Sándor, Anita Szabó, Ernő Fleit, Zoltán Bakacsi, and Gergő Zajzon
Phase separation process is influenced by operational factors that can hardly be controlled. This paper demonstrates the results of a series of experiments aiming to solve these problems using polyvinyl-alcohol - poly-acrylic acid copolymer hydrogel micro-carrier for the adherence of microorganisms to achieve better settling properties of the biomass. The nitrification process was examined using hydrogel micro-carriers and conventional activated sludge flocks. The sedimentation properties of the two systems were compared indifferent conditions. Results show that the sedimentation properties of the immobilized system were more favorable than activated sludge flocks.