Search results

Filters

  • Journals
  • Date
  • Type

Search results

Number of results: 7
items per page: 25 50 75
Sort by:
Download PDF Download RIS Download Bibtex

Abstract

In the present investigation we have studied the effects of static magnetic field on removal of organic compounds and ammonium nitrogen by high loading activated sludge. The research was carried out on laboratory scale at room temperature. Three or two continuously operating test systems were used in the experiment. In two test systems the return activated sludge was exposed to magnetic field strength of 20 mT or 40 mT. The magnets were attached to a pipe used for activated sludge recirculation. The nitrification rate for test systems when the return activated sludge was exposed to magnetic field was higher than for control system in absence of magnetic field. The best data was observed for test system which was exposed to magnetic field of 40 mT. The nitrification rate was 2 times higher than for control system when the loading of activated sludge was in the range of 0.6 to 0,9 g COD/gMLSS ·d for. The results show that magnetic field improves nitrification of domestic wastewater by high loading activated sludge.
Go to article

Authors and Affiliations

Marta Janosz-Rajczyk
Agnieszka Tomska
Download PDF Download RIS Download Bibtex

Abstract

In the present investigation we studied the effects of static magnetic field on transformation of organic compounds and ammonium nitrogen. The research was carried out on laboratory scale at room temperature. Two continuously operating test systems were run in parallel. In one of the systems the raw sewage was exposed to magnetic field strength of 180 mT. The magnets were attached to a pipe used for raw sewage. The second system was used as a control. The research was carried out without activated sludge and with activated sludge. The investigation carried out in an experiment without activated sludge showed that the removal of COD for system with the raw sewage exposed to magnetic field strength of 180 mT was 15% higher then system in absence of magnetic field. During investigation carried out in an experiment with activated sludge it was observed that the removal of COD was similar in both systems. The nitrification rate for system in which raw sewage was exposed to magnetic field was lower than the system in which it was not.
Go to article

Authors and Affiliations

Marta Janosz-Rajczyk
Agnieszka Tomska
Keywords emission
Download PDF Download RIS Download Bibtex

Abstract

The simplified model of the gas emission from cars in the city is presented. The model is based on the Pasquille relation with necessary modifications regarding diffusion in the perpendicular direction to the street axis and the emission in the upper limit of the street. The emission cars from going down the street is modelled as the series of sources located close to the street level, with the emission related to the number and size of the car engine. The emission from sources of pollution located outside the street is modelled as the system of sources of pollution located on the height of the buildings along the street. Some examples showing the influence of the wind velocity and air turbulence on the carbon monoxide concentration along the length and the height of the street are presented.
Go to article

Authors and Affiliations

Marek Janusz
Jan Nadziakiewicz

This page uses 'cookies'. Learn more