The conditions for producing cellulase enzyme were optimized using corn
husks as substrate in submerged fermentation. The effects of five parameters
(incubation temperature, pH, substrate concentration, inoculum volume,
fermentation time) on the s
train growth and enzyme production were studied.
For this purpose the statistical program Minitab and the statistical design
Response Surface Methodology (RSM) were applied.
The study was conducted during the period 2010-2012 in the Faculty of agriculture at the University of Tishreen, with a view to obtain organic fertilizer (sludge with plant waste), through
compost it in the form of a pile within an isolated device.
The changes have been monitoring with some physical and chemical properties of the fermented substance for the duration of fermentation, by taking samples each month and analyzed them in the laboratory.
The study has included change physical and chemical residue during the fermentation process, where the temperature has reached in the center of pile to 70 degrees Celsius and the device temperature exceeded 70 degrees Celsius to 72 degrees Celsius, and either of the pH in the fermented substance had arrived to the 7.4in the pile and 7.45 in the device, the percentage had
dropped C/N from 30/1 to 18/1 of the pile and 17/1 of the device, showing the death of 99% of the huminth eggs of the intestinal worms after 26 days from the beginning of the composting process by crumpling and 97% of the huminth eggs intestinal worms had died after 10 days from the beginning of the composting process in the device.
The corrosion of biogas pipes and equipments damage as generators, boilers and coprocessors is one of
the most real important problems in Damascus wastewater treatment plant (at Adra region). These
problem caused high financial losses and costs , t
hat it required studying and solving. Biogas is the result
of an aerobic digestion process of sludge, it contains about 50-70% of methane as a main resource of
power, where the biogas considers free when it release spontaneity. Different analysis have been occurred
on the biogas to show its components, tests on the pipes material and analysis of sediment material inside
the pipes that caused by biogas.
