Showing papers on "Trickling filter published in 1990"
TL;DR: The rate of ammonia oxidation in the trickling filter was shown to be dependent on the ambient ammonia concentration in the unit, indicating that ammonia oxidation by the nitrifying bacteria was substrate-limited with respect to ammonia.
102 citations
TL;DR: In this article, the effect of simultaneous removal of organic matter on the zero-order biofilm nitrification rate was discussed in relation to the production of faecal organic matter and its 24-hour fluctuation.
61 citations
TL;DR: In this paper, the rotational biological contactors (RBCs) were added to existing treatment plants for tertiary nitrification, which showed many advantages over conventional one-stage RBC9s.
26 citations
TL;DR: The Biofilm-Controlled Nitrifying Trickling Filter (BCNTF) as discussed by the authors has been developed for high rate operation and rendered the process less costly than the activated sludge system for nitrification.
22 citations
TL;DR: The mechanisms of this type of reactor are not yet fully understood as discussed by the authors, and most of the models proposed in the literature are totally or partially empirical and rather far from the actual complexity of the phenomena.
13 citations
Journal Article•
12 citations
TL;DR: The operating data and problems of four large-scale anaerobic-aerobic wastewater treatment plants are described in this paper, where three of these plants, treating wastewaters from a molasses distillery, a wheat starch factory, and a potato-starch factory are described.
12 citations
9 citations
Patent•
19 Dec 1990TL;DR: In this paper, the waste air stream to be purified is passed through a trickling filter which is trickle-irrigated with a scrubbing liquid and simultaneously acts as a support for a microorganism culture degrading the pollutant.
Abstract: The waste air stream to be purified is passed through a trickling filter which is trickle-irrigated with a scrubbing liquid and simultaneously acts as a support for a microorganism culture degrading the pollutant, the waste air stream and the scrubbing liquid being periodically alternately passed in co-current and countercurrent through the trickling filter.
7 citations
01 Jan 1990
TL;DR: In this article, a simple continuous test procedure is described, which allows the rapid determination of biological elimination of organic compounds, and the substances to be tested for biodegrability are dissolved in water and the solution is continuously fed into a laboratory trickling filter, whilst measuring the dissolved organic carbon remaining in the eluate and the carbon dioxide formation
Abstract: In the following study, a simple continuous test procedure is described, which allows the rapid determination of biological elimination of organic compounds. The substances to be tested for biodegrability are dissolved in water, and the solution is continuously fed into a laboratory trickling filter, whilst measuring the dissolved organic carbon remaining in the eluate and the carbon dioxide formation
7 citations
TL;DR: In this paper, an attempt has been made to set up a relationship between the removal efficiency and the dispersion characteristics of biological filters, and the effect of temperature and substrate concentration on the filter efficiency has been investigated.
Abstract: An attempt has been made to set up a relationship between the removal efficiency and the dispersion characteristics of biological filters. For granular-media trickling filters, effluent concentrations have been calculated with the equation of complete mixing at low flow rates and by means of a dispersed plug-flow model for large hydraulic loadings. For coarse media, the mixed flow zone disappears and the substrate removal is obtained using the equation of dispersed plug flow. The effect of temperature and substrate concentration on the filter efficiency has been investigated using the model developed and the application of this theory to the practical problems has been thus demonstrated.
TL;DR: In this article, a system using thickened sludge from the activated sludge sedimentation as H donator was proposed to denitrify the trickling filter effluent.
Patent•
21 Jun 1990
TL;DR: A trickling filter for the biological treatment of water which bears on both sides a multiplicity of drip rods in opposite axial directions in pairs, each of which has a shared bore hole running through the filter is described in this paper.
Abstract: A trickling filter for the biological treatment of water which bears on both sides a multiplicity of drip rods in opposite axial directions in pairs, each of which has a shared bore hole running through the trickling filter. As a result of the capillary action in the multiplicity of tubes thus formed, microorganisms collect in these which are not washed out when the trickling filter is cleaned.
TL;DR: In this article, a high-capacity trickling filter with plastic media was used to enhance operational safety and increase degradation performance of existing activated sludge plants by inserting a high capacity trickling filters with low energy requirements.
Patent•
15 Feb 1990
TL;DR: A rotatably driven immersed trickling filter (RBC) as discussed by the authors is a clarifying apparatus with bucket-like chambers that take up air during their circuit and release it at the bottom circuit region in order to take up liquid which trickles down onto the rotating biological contactor in the upper circuit region.
Abstract: A clarifying apparatus having a rotatably driven immersed trickling filter 5 (rotating biological contactor; RBC), which is only partly immersed in a water/activated sludge mixture, which immersed trickling filter is force-aerated by bucket-like chambers 3 circulating in an elevator-like manner, which chambers take up air during their circuit and release it at the bottom circuit region in order to take up liquid which trickles down onto the rotating biological contactor in the upper circuit region. Since the circulating chambers also serve as growth surface for microorganisms, oxygen is effectively fed to these outside the liquid with a residence time adjustable as desired.
Patent•
30 Aug 1990
TL;DR: In this article, a process and a device operating according to this is proposed for the denitrification of water, in which the water is continuously circulated by means of trickling filters such as rotating biological contactors or disc contactors, at least some of the water circulation region being hermetically sealed from the atmosphere and gases, such as biogases, alkanes or the like being introduced into the sealed off region.
Abstract: A process and a device operating according to this are proposed for the denitrification of water. The water is continuously circulated, in particular by means of trickling filters such as rotating biological contactors or disc contactors, at least some of the water circulation region being hermetically sealed from the atmosphere and gases, such as biogases, alkanes or the like being introduced into the sealed off region. As a result of the rotary movement of the trickling filter, the gases are incorporated into the water, in which case they act here as carbon donors and thus induce the denitrification process.
Book•
01 Jan 1990
TL;DR: Section headings and selected papers: Film Attachment, Fixed Aerobic Granular Beds, Anaerobic Fixed-bed Reactors, and New patents.
Abstract: Section headings and selected papers: Film Attachment. Biomass retention in advanced anaerobic reactors, G Albagnac. Modified polyurethane carriers for biochemical waste water treatment, I Pascik. Wastewater treatment by attached-growth micro-organisms on a geotextile support, G Valentis & J Lesavre Rotating Biological Contactors and Submerged Carriers. Tertiary rotating biological contactors for nitrification, M Boller et al . The submerged biofilm process as a pre-treatment for polluted raw water for tap water supply, M Takasaki et al . Concepts and models for biofilm reactor performance, E Arvin & P Harremo s. Trickling Filters. Operating experience with large random packed biofilm reactors, P Orr & R Lawty. entative nitrogen removal with fixed bed processes in Malmo sewage treatment plant, B Andersson. Fixed Aerobic Granular Beds. Elimination of carbonaceous and nitrogenous pollutants by a twin-stage fixed growth process, G Carrand et al . Industrial-scale applications of fixed biomass on the Mediterranean seaboard. Design, operating results, P Gilles. Anaerobic Fixed-bed Reactors. Treatment of distillery wastewater using an anaerobic downflow stationary fixed-film reactor: performance of a large plant in operation for four years, Y Racault. Removal of sulphate and sulphite in an anaerobic trickling (ANTRIC) filter, E Sarner. Fluidized or Expanded Bed Reactors. High-rate nitrification in a biological fluidized bed, P F Cooper & S C Willi ms. Treatment of waste water at the El Aguila brewery (Madrid, Spain). Methanization in fluidized bed reactors, E Oliva et al . Subject index. New patents. 650 lit. refs. approx., 200 illus. approx.
TL;DR: In order to solve the problems occurring in the North Sea and the Baltic Sea, programmes for the reduction of nutrients in wastewater treatment plants were initiated in the Schleswig-Holstein region.
Patent•
29 Mar 1990
TL;DR: In this paper, the authors describe the packing for the trickling filter units of a biological sewage treatment consists of many interconnected strips of plastic materials, esp. polyethylene or polypropylene foils.
Abstract: Packing for the trickling filter units of a biological sewage treatment consists of many interconnected strips of plastic materials, esp. polyethylene or polypropylene foils. The strips hang down on both sides of carrier beams, e.g., in three layers of strips, arranged with an offset of half a pitch from each other. Another foil along the carrier beam holds the three layers in place.