ARCHIVED REPORTS_RPTS - Laserfiche WebLink

Home Browse Search

' 11.,0 PROCESS DESCRIPTION The Orenco Systems Inc. AdvanTex AX20N is an attached growth multipole pass packed bed reactor.. E In the packed bed reactor, microorganisms remove soluble contaminants from the wastewater, utilizing them as a source of energy for growth and production of new microorganisms. The organic matter is attacked by extracellular enzymes that solubifize the solids4o make them available to the microorganisms as a food I source. The organisms primarily responsible for the degradation of the organic and some inorganic matter, are aerobic bacteria. As such, the transfer of oxygen into the wastewater is critical to the treatment process. A Passive ventilation system is used to provide fresh air to the interior of the packed bed reactor pod. 2.0 PERFORMANCE EVALUATION t_ 2.11 Description of Plant Evaluated F� Th A vanTex AX20N tested in this evaluation has a rated capacity°. of 500 gallons per day (gpd). The d �. Specifications and drawings are included in Appendix A. Raw sewage enters the first compartment of a two-compartment fiberglass:tank (1,000 gal working volume) that provides about 48 hours of retention at the rated capacity. This compartment provides primary treatment; settleable solids accumulate on the bottom and floatable solids accumulate on the surface. Effluent from the clear layer flows into the second compartment of the tank.1(500 gal volume) which provides about 24 hours retention at the rated capacity.: A pump located in a screened pump vault in the second compartment, transfers effluent at a predetermined frequency, to a manifold that distributes the liquid over textile media inside a filter pod. Effluent percolates down through the media and is collected at the bottom of the filter pod. The treated effluent flows out through a pipe to an automated splitter valve. During periods of no flow to the system, all of the treated effluent is returned to the second compartment. Otherwise, part of the treated effluent is discharged, and the balance is returned to the second compartment. Aeration is provided by the sprinkling action of the effluent over the media and as the"effwent moves down through the '1E, media. ' d a El 2.2 Test Protocol Section 9 of ANSI/NSF Standard 40 protocol, "Performance Testing and Evaluation", is included in Appendix 11I B'. Start up of the plant was accomplished by filling the plant with 213 water and 113 raw sewage. The plant was then dosed at the design loading rate of 500 gpd as follows: E li 6 a.m. to 9 a.m. - 35 percent of daily rated capacity (175 gallons) „ 11 a.m. to 2 p.m. - 25 percent of daily rated capacity (125 gallons) 5 p.m. to 8 p.m. - 40 percent of daily rated capacity (200 gallons) � h - } r five seconds to feed around 4 gallons to the test Dosing was accomplished by opening a pneumatic valve for g _ plan#. Doses were spread uniformly over each+dosing period. it Ji manufacturer's discretion), the plant is subjected to the start u period u to three weeks at the ) p , After a p p { p following loading sequence: J I 0�1 111120151060 This report may not be reproduced in whole or in part Page 7 of 46 Final Report without the expressed written consent of NSF International. April 2002