Uniformity of domestic wastewater effluent application in a subsurface drip distribution system.
An on-site wastewater treatment project with two separate drip fields was operated for 6 years and received no maintenance. The two drip fields (with different design configurations) contained pressure-compensating emitters (PC) and non-pressure-compensating emitters (NPC), respectively, and received wastewater with an average 5-day biochemical oxygen demand concentration of 23 mg/L. Flowrates of the PC emitters reduced from rated average of 3.50 to 1.00 L/h, and the average flowrate of the NPC emitters reduced from 2.00 to 1.53 L/h. The statistical uniformities were 48 and 71%, and the uniformity coefficients were 70 and 86% for PC and NPC emitters, respectively. Significant, but incomplete, recovery was achieved with field-flushing and consecutive shock-chlorination treatments of 500 and 1000 mg/L.
Persyn
Russell A
RA
Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, South Dakota 57007, USA. russell.persyn@sdstate.edu
Lesikar
Bruce J
BJ
Duan
Xiaojing
X
D002713:Chlorine / Q000737:chemistry; D004203:Disinfection; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D014872:Water Movements
D012722:Sewage; D002713:Chlorine