The main aim of the work is to study the natural and climatic factors influence on the degree of change in waste fluid temperature in open facilities, depending on the design features of the main facilities (primary sumps, aeration tanks and secondary sumps), indicators for the sewage treatment, as well as a year seasons. It should be noted that today waste fluid temperature influence on the processes of sedimentation and biological treatment has been studied and mathematically described quite well. The high convergence of theoretical result, obtained using these mathematical models in the design with production data, has been repeatedly verified and proved. The statistical data collection on STF operating of Novosibirsk and Iskitim (Novosibirsk region) on the changes in waste fluid temperature at different stages of its purification was carried out for a long time, covering all seasons of the year. Mathematical processing of statistical data made it possible to obtain multivariate regression models that could be used to predict the actual temperature of waste fluid, depending on the operating conditions of wastewater treatment complex.

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This article describes a clinical case of the course and management of pregnancy complicated by cervical insufficiency with prolapse of the fetal bladder and formation of “sludge” in the amniotic fluid at 20–21 weeks of pregnancy. Gradual use of antibacterial therapy and hormonal support with micronized progesterone, subsequent surgical serclage and the installation of an unloading obstetric pessary allowed to prolong pregnancy to 284 days and to deliver through the natural birth canal with a newborn without signs of intrauterine infection.

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