Abstract:
PURPOSE: A hospital wastewater treatment device using an electrocoagulation process is provided to improve the process efficiency of wastewater according to an effluent capacity while drastically reducing the reaction time of the wastewater. CONSTITUTION: A hospital wastewater treatment device using an electrocoagulation process comprises the following: a mixing tank(10) receiving the wastewater; an outlet formed ton the top of the device with an inlet; an electrolysis reaction tank(30) with an insoluble anode plate on which lithium oxide is deposited; an inorganic coagulant feed part(50) supplying inorganic coagulant in the mixing tank; a pump(20) supplying the wastewater into an electrolysis reaction tank; a negative plate of the electrolysis reaction tank; and a power supply part(40) supplying power to the insoluble anode plate.
Abstract:
PURPOSE: A high efficiency vertical type constructed wetland is provided to remarkably reduce the required space for forming a wetland, and to improve the nitrogen removal efficiency. CONSTITUTION: A high efficiency vertical type constructed wetland comprises the following: a screening device; a flow amount controlling tank homogenizing the structure of waste water; a vertical type constructed wetland tank filled a media containing sand, shell powder, gravel, and blast furnace slag, for receiving the waste water from the flow amount controlling tank, and performing a nitrification reaction in the upper side, and an ANAMMOX reaction in the lower side; and a reaction tank returning an effluent of the vertical type constructed wetland tank to the upper side of the vertical type constructed wetland tank.
Abstract:
PURPOSE: A method for manufacturing blocks using sewage sludge, the blocks manufactured by the method, and artificial wetland including the blocks are provided to improve the compressive intensity, the water permeability, and the heavy metal elution characteristic of the blocks by adjusting the mixing ratio of sewage sludge, loess, and clay. CONSTITUTION: A method for manufacturing blocks using sewage sludge includes the following: sewage sludge is dried(S1100); loess and clay are mixed with the dried sewage sludge to prepare samples(S1200); the samples formed into a shaped material(S1300); the shaped material is dried at a temperature between 95 and 115 degrees Celsius(S1400); and the dried material is plasticized at a temperature between 890 and 910 degrees Celsius(S1500). The sewage sludge, the loess, and the clay are mixed at the weight ratio of 15:65:20. After the sewage sludge drying process, the moisture rate of the sewage sludge is 9.3 weight%, and the volatile solid content of the sewage sludge is 52.3 weight%.