Auswahl der wissenschaftlichen Literatur zum Thema „KR C4“

The IWA anaerobic digestion model No.1 (ADM1) had been successfully applied to the lab-scale mesophilic blackwater anaerobic digestion (BWAD) plant for cases of only blackwater (BW) feeding and of BW plus kitchen refuse (KR) feeding. In this paper, the simulation results of BW+KR anaerobic digestion are presented and discussed, followed by the analyses and discussion of the critical and important parameters as well as the performance of ADM1 based on these results. The raw BW can contain up to 30% short chain fatty acids (SCFA) which severely impact the performance of the model. The model proved that the disintegration/hydrolysis rate of BW is around 4.5 d−1, which is about ten times higher than that of KR (Kdis,KR=0.5 d−1). ADM1 is not sensitive to the distribution ratio among carbohydrates, proteins and lipids. For BWAD the C4 metabolism can be integrated in the uptake of LCFA. The uptake delay phenomenon was observed and cannot be simulated by ADM1, but it is tolerable. No unique KI,NH3,ac is found out for all investigated ammonia concentration ranges. Meanwhile, ADM1 is not sensitive to KLa and kp, so they can easily be set up.

The second-order rate constants k2 (dm3 mol-1 s-1) for the alkaline hydrolysis of substituted alkyl benzoates C6H5CO2R have been measured spectrophotometrically in aqueous 0.5 M Bu4NBr at 50 and 25 °C (R = CH3, CH2Cl, CH2CN, CH2C≡CH, CH2C6H5, CH2CH2Cl, CH2CH2OCH3, CH2CH3) and in aqueous 5.3 M NaClO4 at 25 °C (R = CH3, CH2Cl, CH2CN, CH2C≡CH). The dependence of the alkyl substituent effects on different solvent parameters was studied using the following equations: ∆ log k = c0 + c1σI + c2EsB + c3∆E + c4∆Y + c5∆P + c6∆EσI + c7∆YσI + c8∆PσI ∆ log k = c0 + c1σ* + c2EsB + c3∆E + c4∆Y + c5∆P + c6∆Eσ* + c7∆Yσ* + c8∆Pσ* . ∆ log k = log kR - log kCH3. σI and σ* are the Taft inductive and polar substituent constants. E, Y and P are the solvent electrophilicity, polarity and polarizability parameters, respectively. In the data treatment ∆E = ES - EH2O , ∆Y = YS - YH2O , ∆P = PS - PH2O were used. The solvent electrophilicity, E, was found to be the main factor responsible for changes in alkyl substituent effects with medium. When σI constants were used, variation of the polar term of alkyl substituents with the solvent electrophilicity E was found to be similar to that observed earlier for meta and para substituents, but twice less when σ* constants were used. The steric term for alkyl substituents was approximately independent of the solvent parameters.

ABSTRACT Pseudomonas mendocina KR-1 grew well on toluene, n-alkanes (C5 to C8), and 1° alcohols (C2 to C8) but not on other aromatics, gaseous n-alkanes (C1 to C4), isoalkanes (C4 to C6), 2° alcohols (C3 to C8), methyl tertiary butyl ether (MTBE), or tertiary butyl alcohol (TBA). Cells grown under carbon-limited conditions on n-alkanes in the presence of MTBE (42μ mol) oxidized up to 94% of the added MTBE to TBA. Less than 3% of the added MTBE was oxidized to TBA when cells were grown on either 1° alcohols, toluene, or dextrose in the presence of MTBE. Concentrated n-pentane-grown cells oxidized MTBE to TBA without a lag phase and without generating tertiary butyl formate (TBF) as an intermediate. Neither TBF nor TBA was consumed by n-pentane-grown cells, while formaldehyde, the expected C1 product of MTBE dealkylation, was rapidly consumed. Similar Ks values for MTBE were observed for cells grown on C5 to C8 n-alkanes (12.95 ± 2.04 mM), suggesting that the same enzyme oxidizes MTBE in cells grown on each n-alkane. All growth-supporting n-alkanes (C5 to C8) inhibited MTBE oxidation by resting n-pentane-grown cells. Propane (Ki = 53 μM) and n-butane (Ki = 16 μM) also inhibited MTBE oxidation, and both gases were also consumed by cells during growth on n-pentane. Cultures grown on C5 to C8 n-alkanes also exhibited up to twofold-higher levels of growth in the presence of propane or n-butane, whereas no growth stimulation was observed with methane, ethane, MTBE, TBA, or formaldehyde. The results are discussed in terms of their impacts on our understanding of MTBE biodegradation and cometabolism.

Urgency of the research. The issue of using robotic workplaces for training students of technical fields is highly topical. It makes it possible to increase the labour market participation of students not only for the needs of the present, but also for the future. The design and implementation of an educational robotized workplace make it possible to prepare students according to their needs and current knowledge. Target setting. The aim of the solution is to design an educational workplace for handling, equipped with a Kuka KR6 robot and pneumatic effector. The three-finger effector from SMC allows you to hold and carry objects with a maximum clamping force of 130 N. At the same time, the workplace allows you to place handling objects in a total of 32 positions. Actual scientific researches and issues analysis. The deployment of angular industrial robots has also penetrated into other areas of industry where their use was only sporadic. This creates the need for additional personnel able to program the robot and set the technology for a specific issue of the robotized workplace. Uninvestigated parts of general matters defining. Improvement of students' knowledge or retraining of employees creates preconditions for their better application in technical practice. The ability to realize customized programs on industrial robots currently deployed in industry prepares students to perform their work without the need for further training, saving costs and time for employers. The research objective. The aim of the research was to design an educational robotized workplace in order to prepare students according to the specific needs of employers. The workplace allows the use of other pneumatic grippers, while it is possible to connect a total of 16 inputs and outputs for the use of other peripheral devices. The robot can also be used to create a program in an ROS environment, which in turn creates the need to use a Kinect device to detect not oriented components. The statement of basic materials. The use of the robot, whose control system KR C4 is one of the most modern, allows students to prepare for the needs of practice in the nearest future. After completing the training, the student is able to program on-line Kuka robots for industrial use. Conclusions. The article focuses on the design and creation of a training robotized workplace for creating programs using a pneumatic gripper. The design and use of the chessboard makes it possible to create a large number of possible combinations for training purposes. This creates a good precondition for adapting training to the specific needs of trained groups. The use of horizontal and inclined plane will teach students how to use the co-ordinate system of the tool or external base when programming. For this reason, programming the movement of the robot along the correct trajectory is more complex and improves the spatial perception of the students in the robot workspace.

This thesis deals with the design of a software library for PLC Siemens S7-1200 usable in programming of robotic cell. The theoretical part explains the principle of PLC programming and the configuration of an industrial robot. The practical part presents the design of the software library and then the individual blocks of the library are described. The library contains blocks for PLC and is also supplemented by blocks for HMI. Using the proposed library reduces the time required for programming. The software library allows the creation of a unified structure of control programs within the company. The result of the diploma thesis is a tested software library usable in the field.