Showing papers on "Trickling filter published in 1985"

Biologically enhanced oxygen transfer in a fixed-film system

Abstract: Mecanisme d'augmentation du transfert d'oxygene base sur le transfert a l'interface du lit bacterien. Description quantitative du phenomene

Effluent treatment by anaerobic biofiltration

Abstract: Resultats d'essais menes avec divers types d'eaux usees industrielles. Controle du pH, DCO, particule en suspension, biogaz

Method and apparatus for sewage treatment by utilizing empty can

Abstract: PURPOSE:To perform a high-degree sewage treatment without requiring any tertiary treatment, by a method wherein empty cans with microorganisms adhered to the inside and outside surfaces thereof are packed in a cleaning tank to provide a trickling filter and an immersion filter respectively at an upper part and a lower part of the tank, and sewage is supplied and circulated in the tank. CONSTITUTION:Sewage is supplied into the cleaning tank A through an introducing pipe 8, and is sprinkled onto the trickling filter A1 through a sprinkling pipe 10. When a sewage level WL is reached, the immersion filter A2 is formed to obtain a steady state, a circulating pump 11 is operated to circulate the sewage between the trickling filter A1 and the immersion filter A2, and a blower 14 is operated to forcibly feed air through a diffuser pipe 15. Air thus fed-in is supplied into one of left and right parts of the filter A1 partitioned by a partition wall 2, flows upward to an upper part of the tank A as indicated by an arrow C while being accompanied by unpleasant odors generated through decomposition of organic matters during the cleaning process of the sewage, and is then introduced into a soil deodorizer 16 through a degassing pipe 16a, whereby the unpleasant odors are removed.

Soil-covered filter medium circulating type trickling filter method and apparatus therefor

Abstract: PURPOSE:To efficiently clean and deodorize a sewage, by a method wherein a primarily treated liquid dripped from a trickling filter is subjected to an aerobic secondary cleaning treatment in an aerating tank provided at a bottom part of a tower, and odors generated in each treatment are removed by a soil bed provided at a top part of the tower. CONSTITUTION:The sewage sprinkled from a sprinkling pipe 11 flows down through a contact packed bed 3 while being primarily treated by being subjected alternately to an aerobic and an anaerobic biochemical treatment, is dropped through a net form hopper 4, then flows into a contact aerating tank 16 provided at the bottom of the tower, and is subjected to the secondary treatment by an aerobic biochemical treatment, whereby it is cleaned. The liquid thus treated to be clean is discharged to the exterior of the system through a treated water outlet port 18 or a discharging port 19 to be reused. On the other hand, the odors generated from the sewage springled from the pipe 11, the primarily treated liquid and the secondarily treated liquid are carried upward by air blown off from a diffuser pipe 17, and are removed by a soil deodorizing bed 13.

Modular Plastic Media for Shallow Bed Trickling Filter Applications

Abstract: Little specific data is available for less sophisticated trickling filter systems which employ recent plastic media designs for shallow bed filters without the added cost of subsequent aeration and solids contact. Inasmuch as recent changes in the Federal definition of secondary treatment allow many communities the opportunity to utilize more conventional trickling filter designs, the need for the development of reliable criteria for the design of these systems based on documented performance data is needed. Completed and on going studies conducted for the City of Bakersfield, CA, are aimed at providing the criteria needed for the cost effective implementation of a shallow bed (10 feet left bracket 3 meter right bracket deep or less) modular cross-flow plastic media trickling filter system to produce an effluent quality consistent with recent Federal regulations. Evaluations completed to date have resulted in conclusions regarding media performance at various loadings as well as findings regarding media structural stability and weatherability. (Edited author abstract. )