Showing papers on "Trickling filter published in 1977"
30 Sep 1977
TL;DR: In this article, design guidelines for rest-area wastewater treatment systems that are capable of complying with the requirements of PL 92-500 are presented and guidance for determining wastewater flow and constituent concentration.
Abstract: Design guidelines for rest-area wastewater treatment systems that are capable of complying with the requirements of PL 92-500 are presented. Also presented is guidance for determining wastewater flow and constituent concentration. Each wastewater treatment system presented (septic tanks, lagoons, extended aeration package plants, trickling filters, rotating biological filters, land treatment systems, intermittent sand filter systems, and disinfection) includes a process description, a discussion of the performance, flexibility, reliability, and operational procedures, preliminary design formulations, and references and selected bibliography. Also included is a flow chart showing a general design proceudre for new and existing rest areas with emphasis on water supply needs and wastewater treatment systems. /FHWA/
2 citations
Patent•
03 Feb 1977
TL;DR: The packing for a trickling filter bed in biological water treatment plant consists of elements, produced by two thin planar plastics plates which are joined to each other by spacers as discussed by the authors.
Abstract: The packing for a trickling filter bed in biological water treatment plant consists of elements, produced by two thin planar plastics plates which are joined to each other by spacers The gap between the two external plates is closed on top by a horizontal bar, or by a welded joint of the turned-over ends of the plates This creates elements of a packing which retain a stable form, are light, inexpensive and free from the risk of clogging
2 citations
01 Feb 1977
TL;DR: In this paper, two-stage filtration of secondary effluent, in which the coal and the sand filter beds are in separate boxes, was investigated and was found to be equal to, or better than, conventional dual medial filter at a trickling filter plant.
Abstract: Two-stage filtration of secondary effluent, in which the coal and the sand filter beds are in separate boxes, was investigated and was found to be equal to, or better than, conventional dual medial filtration at a trickling filter plant.
2 citations