Sedimentation combined b

This paper introduces the research about the possibility of applying microfiltration through a ceramic tubular membrane with 200 nm pore sizes to the wastewater obtained in the production process of wheat starch and vital wheat gluten. The consumption of process water would thus be reduced, the starch would be exploited better to a greater extent and the wastewater problem would consequently be solved. The second issue examined is the efficiency of the combination with sedimentation prior to the microfiltration as to reduce the occurrence of polarization layer on the membrane and to keep the wastewater permeate flux through the membrane constant as possible. The independent variables, the parameters that vary during the course of microfiltration. are the transmembrane pressure, flow rate and the wastewater sedimentation time prior to microfiltration while the dependent parameter that is constantly monitored during the process is the permeate flux. The maximum value of the permeate flux (24 lm 2h"') was achieved at three bars and at a flow rate of 150 Ih"1 after having initially allowed the wastewater to settle for four hours. Microfiltration reduces the wastewater dry matter from 11.000 mg/l to 4,000 mg/l and it also significantly decreases the values of the suspended matter, namely from 9,000mg/l to 300mg/l

Treatment of model oily waste water by microfiltration

Microfiltration membranes made from polytetrafluorethylene (PTFE) have been successfully used for the separation of oily waste waters by membrane coalescence, but filtration of the oily waste waters with high emulsifier content have not yet been investigated. Our aim was to examine the effect of emulsifier content on membrane coalescence on this type of membrane, and to investigate the effect of surfactant addition on oil retention and filtration parameters. It was found that the oil content of the emulsion can be separated with MF PTFE membranes. Efficiency of the retention depends on the concentration of emulsion: increasing concentrations resulted in an increased retention. The addition of coagulant also affected filtration parameters: higher coagulant concentrations resulted in a significant increase of the flux, while the retention marginally decreased

Optimization of microwave process to improve the biodegradability of meat processing sludge

Microwave (MW) technique is a promising process for sludge conditioning, numerous papers has verified the beneficial effects on the microbial degradation and anaerobic digestion of municipal sewage sludge, but cannot be found study specialized on the investigation of MW process with different intensities for sewage sludge generated in food industry wastewater purification technologies. Our research was focused on obtaining optimum parameters of MW pre-ireatment for meal processing sewage sludge (MPSS) using solubility index (SLI) and the 5 days biodegradability index (BDIs) as control parameters. For the modeling and optimization response surface methodology (RSM) and multiple linear regressions (MLR) were applied, respectively. The investigated factors were the irradiated MW energy (IMWE) and the specific MW power level (MWPL). The results shown, that since the large-scale biodegradability enhancement, the MW pre-treatment is suitable for MPSS conditioning. The MW pre-treatmcnts could be advantageous in numerous process based on biological transformation, such as activated sludge recycling processes, composting and anaerobic digestion

Treatment of model oily waste water by microfiltration

Microfiltration membranes made from polytetrafluorethylene (PTFE) have been successfully used for the separation of oily waste waters by membrane coalescence, but filtration of the oily waste waters with high emulsifier content have not yet been investigated. Our aim was to examine the effect of emulsifier content on membrane coalescence on this type of membrane, and to investigate the effect of surfactant addition on oil retention and filtration parameters. It was found that the oil content of the emulsion can be separated with MF PTFE membranes. Efficiency of the retention depends on the concentration of emulsion: increasing concentrations resulted in an increased retention. The addition of coagulant also affected filtration parameters: higher coagulant concentrations resulted in a significant increase of the flux, while the retention marginally decreased

Insulin resistance, atherogenic dyslipidemia and other atherogenic factors in simple obesity and obesity with Acanthosis nigricans (an) in childhood

Die Proteine der Roco-Familie sind Multidomänen-Proteine, deren Funktion in der Zelle noch weitgehend unbekannt ist. Das charakteristische Merkmal der Roco-Proteine ist das Roc-COR Domänentandem, das in allen Familienmitgliedern konserviert ist. Bei Roc handelt es sich um eine GTP-bindende Domäne. In dieser Arbeit wurden die Domänen des Roco-Proteins von $\textit {Chlorobium tepidum}$ strukturell und biochemisch charakterisiert. Es konnten die Strukturen der COR-, des Roc-COR-Tandems und der LRR-Domäne gelöst werden. Zudem zeigte sich, dass das $\it {C.t.}$ Roco-Protein zu den dimerisierenden G-Proteinen gehört, wobei ein unter den bakteriellen Proteinen konservierter Arginin-Rest essentiell ist. Basierend auf überlappenden Bereichen der LRR- mit der Roc-COR-Struktur konnte ein Modell des voll-länge Roco-Proteins erstellt werden. Für das in Parkinson Patienten mutierte LRRK2 konnte zudem ein Kinase-Regulationsmodell erstellt und über die Wirkung der Mutationen Rückschlüsse gezogen werden