Temat: Bacterial load - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Treatment of Hospital Wastewater Using Activated Sludge with Extended Aeration
Autorzy:: Custodio, María
Cuadrado-Campó, Walter
Peñaloza, Richard
Vicuña-Orihuela, Carmela
Torres-Gutiérrez, Elmer
Orellana, Edith
Powiązania:: https://bibliotekanauki.pl/articles/2202195.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: suspended solids
bacterial load
activated sludge
removal efficiency
hospital wastewater
Opis:: Hospital wastewater is of a complex nature and is generally discharged into urban sewage systems. This study evaluated the removal efficiency of organic and biological contaminants from a hospital wastewater treatment plant using extended aeration activated sludge. The study was conducted at a treatment plant scale, with 14 hours of feed. The plant consists of a pre-filter, a collector and crumbler tank, a homogenization tank, two biological reactors of 80 000 liters capacity each, two settlers and a contact disinfection chamber. Three flow rates of 3 L/s, 4 L/s and 5 L/s were tested in each biological reactor, with application of three concentrations of residual chlorine with sodium hypochlorite to the effluent of the settling tanks (0.3 ppm, 0.4 ppm and 0.5 ppm). The removal efficiency of suspended solids varied according to flow rate. The reactor with a flow rate of 3 L/s and 0.5 ppm of residual chlorine achieved the highest removal of suspended solids (91.95%), biological oxygen demand (97.52%) and fecal coliforms (99.99%). Finally, the quality of the hospital wastewater is within the limits of the national and international environmental quality thresholds.
Źródło:: Journal of Ecological Engineering; 2022, 23, 11; 24--32
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Vacuum-assisted closure (VAC) for postoperative secondary peritonitis: Effect on bacterial load as well as local and systemic cytokine response (initial results)
Autorzy:: Jannasch, Olof
Meyer, Frank
Fuellert, Angela
König, Brigitte
Eder, Frank
Tautenhahn, Jörg
Powiązania:: https://bibliotekanauki.pl/articles/1392893.pdf
Data publikacji:: 2018
Wydawca:: Index Copernicus International
Tematy:: Vacuum-therapy
Postoperative secondary peritonitis
Bacterial load
Local and systemic cytokine response
Opis:: Aim: To investigate the effects of vacuum-assisted closure (VAC) vs. relaparotomy on demand (ROD) onto the i) severity and course of disease, ii) surgical outcome, iii) intraperitoneal bacterial load as well as iv) local/systemic inflammatory and immune response in postoperative secondary peritonitis. Methods: Over a defined time period, all consecutive patients of the reporting surgical department with a secondary peritonitis (assessed by Mannheim’s Peritonitis Index [MPI] and APPACHE II score) were enrolled in this systematic unicenter clinical prospective observational pilot study. Patients were subclassified into VAC or ROD group according to surgeon’s individual decision at the time point of primary surgical intervention with the intent to sanitize the source of infection. Early postoperative result was assessed by 30-d and in-hospital mortality. Bacterial load was characterized by microbiological culture of intraperitoneal fluid collection obtained on postoperative days (POD) 0 (primary surgical intervention), 1,4,7,10,13 and following description of the microbial spectrum including semiquantitative assessment of bacterial load. Local/systemic inflammatory and immune response was determined by ELISA-based analysis of CrP, PCT and the representative cytokines such as TNF-α/IL-1α/IL-6/IL-8/IL-10 of serum and peritoneal fluid samples. Results: Over a 26-month investigation period, 18 patients (male:female=9:9) were eligible for study criteria: n=8 were enrolled in the VAC and n=10 in the ROD group. With regard to early postoperative results represented by mortality, there is no significant difference between both patient groups. Despite the relatively low number of cases enrolled, a tendency for more severe findings associated with the VAC group could be detected based on the MPI score. There was also a tendency for higher APACHE II scores in the VAC group from the 7th POD on and, in addition, patients of this group had a longer hospital stay. For patients with persisting infection, there were no relevant differences comparing VAC therapy and ROD. Cytokines released in particular at the beginning of the inflammation cascade with proinflammatory characteristics showed higher values within the peritoneal fluid whereas CrP and PCT were found to be higher within the serum samples. Conclusion: Comparing data of various local/systemic inflammatory and immune parameters, there were only a few correlations. This may indicate compartmentation of the inflammatory process within the abdominal cavity. Based on the observed inter-individual variation of this pilot study data, the clinically applicable benefit appears questionable. In this context, reliable effects of VAC therapy on the reduction of bacterial burden within the abdominal cavity could not clearly be detected.
Źródło:: Polish Journal of Surgery; 2018, 90, 5; 27-35
0032-373X
2299-2847
Pojawia się w:: Polish Journal of Surgery
Dostawca treści:: Biblioteka Nauki

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