Topic
Trickling filter
About: Trickling filter is a research topic. Over the lifetime, 1098 publications have been published within this topic receiving 20219 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the authors compare the performance of two biological aerated filters, one containing a floating media and the other containing a sunken media under identical conditions during start-up and with increasing hydraulic flowrates.
57 citations
TL;DR: In this paper, the distribution of nutrients and heavy metals in a constructed wetland system designed for processing domestic sewage (150 person equivalent) was measured in a reed root zone filter of the vegetation submerged bed (VSB) type with horizontal flow of sewage, and a combination of ditches and soil filters.
57 citations
Journal Article•
TL;DR: In this paper, five pilot-scale wastewater treatment processes that provided less than secondary treatment were evaluated for removal of priority pollutants from municipal wastewater, including primary clarification plus filtration, chemical clarification, high-rate trickling filter, aerated lagoon, and facultative lagoon.
Abstract: Five pilot-scale wastewater treatment processes that provided less than secondary treatment - primary clarification plus filtration, chemical clarification, high-rate trickling filter, aerated lagoon, and facultative lagoon - were evaluated for removal of priority pollutants from municipal wastewater. A conventional activated sludge system was operated in parallel as a control. Wastewater feed was spiked with 21 organics dissolved in toluene. Removal of ambient concentrations of live metals was also evaluated. The control typically removed 80 to 90% of volatiles and 85 to 95% of semivolatiles. The facultative lagoon was the best alternative process, followed by the aerated lagoon. Removals of a specific toxic pollutant depended on the properties of the chemical and its interactions with removal mechanisms used in each treatment process. 9 references, 2 tables.
57 citations
Journal Article•
TL;DR: Reaction rates in tertiary nitrifying trickling filters have been significantly increased by the development of the bio film-controlled nitrifiers (BCNTF), and a design model has been developed that accurately predicts performance.
Abstract: Reaction rates in tertiary nitrifying trickling filters have been significantly increased by the development of the bio film-controlled nitrifying trickling filter (BCNTF). The use of cross-flow media in the BCNTF permits higher oxygen transfer to the biofilm than does the older vertical media. The use of a flooding cycle prevents the growth of predator organisms that have consumed the biofilm in other plants and disrupted nitri fication. A backwash feature controls biomass inventory and eliminates the need for subsequent clarification. Operation and maintenance and capital costs are often less than for other pro cesses. A design model has been developed that accurately predicts performance. / Water Pollut. Control Fed., 61, 618 (1989).
57 citations
TL;DR: In this paper, slime-covered rocks and samples of process waters from two trickling filters for treatment of municipal wastes were brought to the laboratory for probing with microelectrodes to determine dissolved oxygen (DO).
Abstract: Slime-covered rocks and samples of process waters from two trickling filters for treatment of municipal wastes were brought to the laboratory for probing with microelectrodes to determine dissolved oxygen (DO). Slime thickness was 0.4–1.5 mm. Flow rate of medium over the slime had a minor effect on slime respiration, but pH 5 or below was strongly inhibitory. Increasing temperature showed lower oxygen concentration throughout a slime, although 27°C had results little different from those at 22°C. Medium concentration had a profound effect on oxygen concentration profiles, and either oxygen-limited or substrate limited respiration could be demonstrated. Illumination of slimes from the top of the trickling filter developed oxygen supersaturation because oxygen from photosynthesis could not diffuse away rapidly.
56 citations