Methods for injecting dry bulk amendments for water and soil treatment

An apparatus for introducing dry powderous material into a fluid stream to maintain a predetermined mixture level comprising:

• a. a vertically oriented silo for storing said dry material in bulk form, said silo having an inlet and an outlet for, respectively, receiving and discharging said material;
• b. a surge hopper located gravitationally downstream from the storage silo, said hopper being separated form the silo by a control valve;
• c. a volumetric feeder located gravitationally downstream from the hopper, said feeder including a horizontally oriented metering auger coupled with an intromitter for conditioning and feeding said dry material;
• d. a processor controlled variable speed motor for driving said metering auger and said intromitter for precise metering of said dry material;
• e. a mixing tank for receiving the dry material from said feeder and mixing it with a fluid to from a slurry, said tank including at least one mixer;
• f. a pump for removing slurry from said tank through an outlet conduit and injecting it into said fluid stream;
• g. an inlet conduit in said tank in communication with a source of pressurized fluid, and a float valve adjacent to said inlet conduit for maintaining a desired level of fluid in said tank;
• h. and a processor in communication with said motor and with at least one sensor associated with said fluid stream;
• wherein said processor continuously varies the speed of said motor to vary the quantity of dry material metered into said tank in accordance with continuous readings form said at least one sensor so as to introduce slurry from said tank containing variable quantities of said material to maintain a desired level of said material in said fluid stream.