Abstract: A wastewater collection system is provided with a gas withdrawal vent including a gas suction apparatus. The gas is preferably withdrawn at a rate in excess of the gas production by microbes in the wastewater collection system so that a slight negative pressure is created in the immediate vicinity of the gas withdrawal vent. A gas mixing chamber is coupled to the fan or blower to receive the gas withdrawn from the wastewater collection system. An ozone generation apparatus is also coupled to the gas mixing chamber that is adjusted to provide sufficient ozone to react with any noxious or malodorous components of the withdrawn gas. A reaction conduit is provided at an output of the gas mixing chamber to receive the withdrawn gas and ozone. The reaction conduit has surface features assuring turbulent flow of the gasses through the length of the conduit.

Abstract: An articulated riding mower comprised of a sulky unit pivotally connected to a walk-behind mower. To attach the sulky to the walk-behind mower, the mower deck includes a bridge support overlying the mower deck between the rear corner positions thereof. The bridge support has depending extensions at the corner positions mounted on the axle of the rear wheels. The depending extensions of the bridge support are, in turn, rigidly fastened to the respective corners of the mower deck. A central portion of the bridge support carries a pivotal connection including a bearing for removably attaching the sulky to the walk-behind mower. In a preferred embodiment, the handle of the walk-behind mower is connected, at its lower end, directly to the bridge support.