Systemy nadzoru korporacyjnego w Polsce i w Niemczech – analiza porównawcza

Sponsorami konferencji byli: Stowarzyszenie Księgowych w Polsce Oddział Okręgowy w Łodzi, Krajowa Izba Biegłych Rewidentów

Obstetric results of the multicenter, nationwide, scientific-educational program for pregnant women with gestational diabetes mellitus (GDM)

Objectives: The aim of the present study was to compare the obstetric results in women with GDM in a Polish population based on the criterion for the diagnosis of GDM. Material and methods: The study was a questionnaire study covering the data of 2853 patients with GDM treated in centers nationwide in the years 2011–2013. The principles of self-control, glycemic targets and treatment were based on the then-current PDA guidelines. Analysis of the collected data included an assessment of obstetric results based on the diagnostic criteria for GDM. Depending on the result of the glucose tolerance test, the patients were divided into subgroups. Results: 6.28% of births were preterm, and 47% were caesarean. A significant difference was observed in the number of preterm births between a subgroups: PDA(+) meeting only criterion 0’ and a PDA(+)meeting only criterion 120’ (16.67% vs. 5.83%); and between WHO(+) subgroup meeting only criterion 0’ with respect to the subgroup PDA(+) meeting only criterion 0’ (4.69% vs. 16.67%). Significant difference was found in the frequency of LGA between the WHO(-)PDA(+) and WHO(+)PDA(-) subgroups (6,57% vs. 14.93%), and between the WHO(-)PDA(+) group and a group of isolated hyperglycemia in 60’(6.57% vs. 12.5%). Also a significant positive correlation was observed between birth weight, the occurrence of LGA and macrosomia, and maternal weight and BMI before pregnancy. Conclusions: The results of the analysis indicate the new criteria have greater sensitivity in the prediction of prematurity and birth weight. However, it cannot be ruled out that the final results were affected by the therapeutic intervention employed

Ozone as a Catalyst of Surplus Activated Sludge Hydrolysis for the Biogas Production Enhancement

The biogas produced in the methane fermentation is valuable due to its use as a renewable energy source. A promising method of biogas production intensification is sludge flocs disintegration via ozonation. The aim of this study was to check the impact of the ozonation on the efficiency and kinetics of biogas production from surplus activated sludge (SAS). Processes were carried out batchwise at 37 °C. The following analyses were performed: pH, alkalinity, dry matter, dry organic matter, chemical oxygen demand, total organic carbon, total nitrogen, elemental analysis (CHNS), the biochemical potential of methane by NIR spectroscopy, and the amount and composition of biogas. The results showed that the ozonation process had no effect on the elemental composition and chemical structure of SAS. The chemical formula of SAS (C2.97H4.68O1.20N0.3) and a simplified equation describing the methane fermentation process were determined. Ozonation caused the hydrolysis of some organic compounds from sludge flocs and increased the efficiency of biogas production. The methane content in biogas was higher by about 2.5%, while the amount of produced biogas rose by up to 21% for the ozonized sludge. The kinetic constants of first-order reaction were between 0.219 and 0.323 d−1, with an upward trend due to ozonation

Ozone as a Catalyst of Surplus Activated Sludge Hydrolysis for the Biogas Production Enhancement

The biogas produced in the methane fermentation is valuable due to its use as a renewable energy source. A promising method of biogas production intensification is sludge flocs disintegration via ozonation. The aim of this study was to check the impact of the ozonation on the efficiency and kinetics of biogas production from surplus activated sludge (SAS). Processes were carried out batchwise at 37 °C. The following analyses were performed: pH, alkalinity, dry matter, dry organic matter, chemical oxygen demand, total organic carbon, total nitrogen, elemental analysis (CHNS), the biochemical potential of methane by NIR spectroscopy, and the amount and composition of biogas. The results showed that the ozonation process had no effect on the elemental composition and chemical structure of SAS. The chemical formula of SAS (C2.97H4.68O1.20N0.3) and a simplified equation describing the methane fermentation process were determined. Ozonation caused the hydrolysis of some organic compounds from sludge flocs and increased the efficiency of biogas production. The methane content in biogas was higher by about 2.5%, while the amount of produced biogas rose by up to 21% for the ozonized sludge. The kinetic constants of first-order reaction were between 0.219 and 0.323 d−1, with an upward trend due to ozonation