Разработка технологии, проектирование оснастки и участка сборки-сварки секции верхней стрелы крана КС-55722

Объект исследования: Секция верхняя стрелы крана КС-55722. Цель работы: разработка технологии сборки-сварки, проектирование сварочной оснастки и участка. Актуальность работы: технология сборки и сварки верхней секции является не совершенной и требует некоторых доработок. Поэтому актуальным становится вопрос совершенствования технологии сборки-сварки, проектирование сварочной оснастки и участка. Рассматриваемые вопросы: произвести теоретический анализ и инженерный расчет. Полученные результаты: в процессе работы рассчитаны режимы сварки, подобрано сварочное оборудование, пронормированы сборочные и сварочные операции, разработан директивный технологический процесс.Object of investigation: Section of the upper boom of the crane КС-55722. Purpose of work: Development of assembly technology-welding, designing of welding equipment and site. Relevance of work: The technology of assembly and welding of the upper section is not perfect and requires some modifications. Therefore, the issue of improving the assembly technology-welding, designing of welding equipment and a site becomes urgent. Questions to be addressed: Perform theoretical analysis and engineering calculations. The obtained results: In the process of work, welding modes are calculated, welding equipment is selected, assembly and welding operations are normalized, a directive technological process is developed. The section on social responsibility and financial management, resource efficie

Control and dynamic optimization of polymerization reaction processes

Imperial Users onl

Control and dynamic optimization of polymerization reaction processes

EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Assessment of Nutrients Recovery Capacity and Biomass Growth of Four Microalgae Species in Anaerobic Digestion Effluent

Four microalgae species were evaluated for their bioremediation capacity of anaerobic digestion effluent (ADE) rich in ammonium nitrogen, derived from a biogas plant. Chlorella vulgaris, Chlorella sorokiniana, Desmodesmus communis and Stichococcus sp. were examined for their nutrient assimilation efficiency, biomass production and composition through their cultivation in 3.7% v/v ADE; their performance was compared with standard cultivation media which consisted in different nitrogen sources, i.e., BG-11NO3 and BG-11ΝH4 where N-NO3 was replaced by N-NH4. The results justified ammonium as the most preferable source of nitrogen for microalgae growth. Although Stichococcus sp. outperformed the other 3 species in N-NH4 removal efficiency both in BG-11NH4 and in 3.7% ADE (reaching up to 90.79% and 69.69% respectively), it exhibited a moderate biomass production when it was cultivated in diluted ADE corresponding to 0.59 g/L, compared to 0.89 g/L recorded by C. vulgaris and 0.7 g/L by C. sorokiniana and D. communis. Phosphorus contained in the effluent and in the control media was successfully consumed by all of the species, although its removal rate was found to be affected by the type of nitrogen source used and the particular microalgae species. The use of ADE as cultivation medium resulted in a significant increase in carbohydrates content in all investigated species