H2-KH-24-D motor flender himmel Helical gear units H2

Flender/Flender Gear Units/Helical gear units H2

are good water-solubility and the biodegradability of the exhaust air constituents. There have recently been signs that the field of application can be extended considerably, even to cover hardly water-soluble but highly biodegradable exhaust air constituents, through the addition of auxiliaries. These auxiliaries - should be easily available for hardly water-soluble exhaust air constituents, - ,ossess only very slight solubility in water, even when finelydistributed (dispersion or emul- sion), and not be biodegradable themselves, or only to very small extent. The goal of this project is modification of the conventional bioscrubbing process through the addition of auxiliaries and research into problems which may result therefrom with view to optimisation of process control. 2. Working steps Because the functions of bioscrubbers can be subdivided into two elimination areas, the working rogramme is split accordingly. Thus, the absorption and the rate of microbial degra- dation orselected exhaust air constituents are initially being determined separately from one another. The knowledge thus gained will supply data for the operation of pilot plant, in which both elimination mechanisms will run simultaneously. At,the same time, high-boiling substan- ces will be sought which are suitable for use as absorption auxiliaries. 3. Results laboratory test plant was used to investigate whether and to what extentthe degree of puri- fication ofa bioscrubbercan be improved bytheaddition of an absorption auxiliarywhen treat- ing hardlywater-soluble organicsolvents.Thepilotplantwasdesignedforexhaustairflows of up to4 m3/handwasprovidedwitha1 m3 activationtank.Onthe basisofthenecessaryphy- sical properties, such as ow intrinsic vapour pressure, number of absorption auxiliaries were investigated as regards their biodegradability and possible inhibitin effectson the microorga- nisms. Of the high-boilers investigated, silicone oil proved to be ! most suitabl