Trickling filter

About: Trickling filter is a research topic. Over the lifetime, 1098 publications have been published within this topic receiving 20219 citations.

Composite biotrickling filter for nitrogen and phosphorus removal

Abstract: The invention relates to a composite biotrickling filter for nitrogen and phosphorus removal. The biotrickling filter comprises a trickling filter body; an anoxic filter is arranged in the trickling filter body; an oxic filter is formed between the anoxic filter and the inner wall of the trickling filter body; a first bearing plate is arranged in the anoxic filter, and a first inorganic filler layer is arranged on the first bearing plate; and a second bearing plate is arranged in the oxic filter, and a second inorganic filler layer is arranged on the second bearing plate. The filter utilizes an anoxic and oxic alternate environment for nitrogen removal, nitrogenous organic compounds and ammonia nitrogen are oxidized into nitrate nitrogen in the oxic filter and backflow into the anoxic filter, and anoxic microorganisms uses the carbon source in raw water to revert nitrate nitrogen into nitrogen, so that nitrogen removal is achieved. The oxic filter removes organisms and oxidizes ammonia nitrogen into nitrate nitrogen, and high backflow improves the removal efficiency and the nitrogen removal efficiency on organic pollutants.

Development of a Rational Approach to Trickling Filter Design

Abstract: Trickling Filtration, like other biological waste-treatment processes, is an engineered development of a natural process of biodegradation. However both the design and operation of this process for municipal sewage—treatment are still somewhat empirical. In the case of industrial wastewater treatment the design situation is even less satisfactory. The basic processes which occur during the trickling filtration process are: (a) Mass transfer (of the organic material to be removed, plus nutrients and oxygen) into the slime and, (b) Biodegradation in the slime. These fundamental processes were studied under carefully controlled laboratory conditions by measuring the biodegradation of substrates using thin layers of heterogeneous microbial cultures. The commonly-accepted basis of the design equations found in the literature for trickling filters is a correlation of substrate removal in terms of some measure of the applied loading. The studies carried out show that this conventional procedure is unsound. An improved procedure which is both simple to use, and conceptually satisfying, is proposed.

Liquid film effects on the elimination of CO and NO in trickle bed biofilm reactor

Abstract: This work was stimulated by the interests of the Austrian company OSAG to clean the exhaust gases of the Katschbergtunnel. An important motivation for this research work was to improve the living conditions of the people of the Gries region by reducing the emissions. The aim was the biological cleansing of waste air from road tunnels, especially the cleansing of gaseous pollutants carbon monoxide (CO) and nitrogen monoxide (NO). The carboxydotrophic culture were enriched in laboratory reactors. Trickling filters were chosen as biological cleansing reactors for waste air. The enrichment in the reactors was carried out under continuous exposure to CO and NO gas and semicontinuous exposure to a nutrient medium. The adjustment of the concentration of waste air is carried out with compressed air.

Experimental Study on Purification of Formaldehyde-contained Waste Gas With a Biological Trickling Filter Using Sodium Sulfite as Trickling Liquid

Abstract: Sodium sulfite(Na2SO3) of 0.05 M was used as trickling liquid in a biological trickling filter to purify waste gas containing formaldehyde.Purification efficiency and elimination of formaldehyde were studied.Experimental results showed that when the influent gas flow was raised,the elimination of formaldehyde was increased and the purification efficiency was up to 99.85%.With the increase of formaldehyde concentration in the influent gas,the purification efficiency and elimination were increased,the purification efficiency was up to 100%,and the elimination was up to 5.3 mg/l·h.As the trickling liquid flow was raised,the purification efficiency was increased,which was over 99.5%,and the elimination was kept at ~1.67 mg/l·h.The study provided important preliminary data for developing an efficient method for purification of waste gas containing formaldehyde.