The utility model relates to an effluent treatment plant and effluent disposal system. The utility model discloses a make effluent treatment plant efficiency well carry out purification treatment to high concentration waste water. In order to achieve the aim, effluent treatment plant (10) that are being arranged in handling high concentration waste water, set up a plurality of contacts (12) in treatment trough (11), and set up nozzle (13) and guide part (14) ( plate -like member (14a), the fungus that these a plurality of contacts (12) are arranged in making high concentration waste water adheres to up, this nozzle (13) set up and are more leaning on below one side than these a plurality of contacts (12), a high concentration waste water that the blowout supplied to this nozzle (13) in was used for finishing groove (11), this guide part (14) sets up the blowout side at nozzle (13), a direction removes for making from high concentration waste water court a plurality of contacts (12) that this nozzle (13) spouts.