摘要:
A reflecting mirror tilting actuator comprises a base having an inner space defined therein, a mirror holder having a fixing part fixed to the base and a horizontal part integrally connected with the fixing part by a resilient connection part, the mirror holder being provided with at least one resilient member for resiliently supporting the reflecting mirror upward, a mirror supporting unit having a cover attached to the horizontal part and a mirror stopper disposed between the horizontal part and the cover, a tilting unit having an actuating member whose upper end comes into contact with the horizontal part and a tilting stopper whose upper end comes into contact with the horizontal part, and a horizontal adjusting unit having at least one adjustment screw, whose lower end contacts the mirror stopper through at least one adjustment hole formed at the cover, for adjusting flatness of the reflecting mirror.
摘要:
Disclosed herein is a dynamic aperture driving apparatus for adjusting the amount of light of a projection optical system and a method of controlling the same. The system includes a rotation means, a driving means, a first detection means and a first detection means. The rotation means is connected at the upper end thereof to the dynamic aperture to be rotated to the right and left within a range of rotating angles. The driving means rotates the rotation means to the right and left according to a predetermined electric signal. The first detection means detects the position of the rotation means using a Hall effect. The second detection means detects the operational error of the first detection means due to variation in temperature.
摘要:
The present invention provides to a method for removing nitrogen and phosphorous in wastewater simultaneously from wastewater by employing fermentation broth obtained by anaerobic fermentation of organic solid wastes. The method for removing nitrogen and phosphorous in wastewater of the invention comprises the steps of subjecting organic waste material to anaerobic fermentation at 30 to 40° C. for 2 to 4 days by using anaerobic sludge to obtain fermentation broth; and, adding the fermentation broth to a sequencing batch reactor with alternating anaerobic-aerobic-anoxic cycles under anaerobic and anoxic conditions in a separate manner. In accordance with the present invention, nitrogen in the influent wastewater can be removed more than 95% in total and phosphorous concentration can be kept below 1 ppm regardless of the concentration of organic materials in the influent wastewater. Further, the present method requires no extra pretreatment steps or chemicals which are essential to remove residual ammonia nitrogen in the prior art systems, and lowers the overall cost for wastewater treatment due to the usage of organic waste materials.