The paper considers the issue of compliance with technological regulations for operation regenerator aeration tank. An analysis features processes in was carried out, factors affecting them were determined, namely intensity aeration, consumption and initial dose activated sludge. To determine characteristics sludge at exit from regenerator, experimental studies conducted a model obtained that d...

In this section of the Journal the reader will find information on the IWWG (International Waste Working Group), reports on activities carried out by Task Groups, a list of future events and relevant notes on the think tank elaboration and activities of the association. In this issue: report from Sardinia 2013 – Fourteenth International Waste Management and Landfill Symposium, and updates on th...

Aeration is an essential process in the majority of wastewater treatment processes, and accounts for the largest fraction of plant energy costs. Aeration systems can achieve wastewater oxygenation by shearing the surface (surface aerators) or releasing bubbles at the bottom of the tank (coarse- or fine-bubble aerators). Surfactants accumulate on gas-liquid interfaces and reduce mass transfer ra...

Oxygen transfer efficiencies of various components of the marsh-pond-marsh (M-P-M) and marsh-floating bed-marsh (M-FB-M) wetlands treating swine wastewater were determined by performing oxygen mass balance around the wetlands. Biological oxygen demand (BOD) and total nitrogen (TN) loading and escaping rates from each wetland were used to calculate carbonaceous and nitrogenous oxygen demands. Am...

Conventional stirred-tank bioreactor (STR) designs are optimised for cultures of bacteria but not fungal cultures; therefore, a new Air-L-Shaped Bioreactor (ALSB) was fabricated. The ALSB designed to eliminate the wall growth and clumping mycelium in STRs. Ganoderma lucidum used as model its biomass exopolysaccharide (EPS) production were maximised by optimising agitation rate, glucose concentr...