Surfacing of Domestic Wastewater Applied to Soil through Drip Tubing and reduction in numbers of Escherichia coli

摘要

Drip tubing is a technology that is increasing in use. The effectiveness of such systems in distributing the wastewater uniformly through the soil matrix, providing adequate removal of bacteria from wastewater, and keeping wastewater from reaching the soil surface has not been adequately evaluated. Experiments were conducted at two sites that had used drip tubing for approximately 3 years. This 3-year-old drip tubing and newly installed tubing were used in this investigation. A solution containing Brilliant Blue FCF dye and Escherichia coli, at an approximate concentration of 1 X 10~6 cells ml~-1, was applied to the sites through drip emitters.