Outdoor toilet holding tank ventilation system

An outdoor toilet holding tank ventilation system for reducing the generation of noxious odors by solar energy heat build-ups in a toilet waste material holding tank located within a portable, outdoor toilet cabana containing toilet equipment, comprising:

• a vent pipe having a lower end opening into the toilet waste material holding tank and an opposite upper, open end portion which extends through the cabana and opens to outside atmosphere;
• a small, electrical motor-operated, blower fan mounted upon the vent pipe open end portion for blowing air outside of the cabana, the blower fan comprising a small, relatively flat, motor-fan assembly which is generally centered over the outside end of the vent pipe, mounting means securing the motor-fan assembly upon the vent pipe, a cover positioned over, and spaced a short distance above, the motor fan assembly, and secured to the outside end of the vent pipe, with at least portions of the interior of the cover being unobstructed so that air from the fan blows against the inside surface of the cover and is directed downwardly towards and outwardly of the cover for exhausting to atmosphere;
• a short length vent adaptor tube sized to connect with the upper end portion of the vent pipe, and with the adaptor tube having a radially extending substantially flat flange formed on its upper end, upon which flange the motor fan is mounted in roughly axial alignment with the upper end portion of the vent pipe;
• a substantially continuous rim formed upon and extending from the peripheral edge of said flange and the cover being secured to said rim, with the flange exterior, peripheral edges being shaped so that selective portions of the flange extend further from the center of the flange than the remaining portions of the flange, so as to provide unobstructed spaces for the passage of air outwardly from the cover around said flange;
• a solar heat-electrical energy generating panel mounted upon the exterior of the cabana for exposure to natural sunlight, to generate electrical energy in response to direct exposure to predetermined levels of sunlight shining thereupon;
• said panel being electrically connected to the fan motor for providing electrical energy for activating the fan only during periods of such predetermined levels of sunlight applied to the cabana;
• whereby the fan sucks air out of the waste holding tank through the vent pipe and blows the air out of the pipe to atmosphere for causing air to circulate through the cabana and through the tank and, thereby, to remove some of the solar energy-caused heat concentrated in said tank and, as a result, reduce heat-caused chemicals or bacteriological activity within the waste material in the tank for reducing the generation of noxious odors resulting from such activity.