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Trickling filter

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


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Journal ArticleDOI
TL;DR: Three structured peat media and two trickling systems have been introduced in this study, which has revealed that the biological system was in a condition of nutrient limitation instead of carbon limitation.
Abstract: Biofiltration is a cleaning technique for waste air contaminated with some organic compounds. The advantages of the conventional biofilter over other biological systems are a high-superficial area best suited for the treatment of some compounds with poor water solubility, ease of operation, and low operating costs. It has crucial disadvantages, however; for example, it is not suitable to treat waste gases with high VOC concentrations and it has poor control of reaction conditions. To improve on these problems and to build a high-performance biofilter, three structured peat media and two trickling systems have been introduced in this study. The influences of media size and composition have been investigated experimentally. Peat bead blended with 30% (w/w) certain mineral material with a good binding capacity has advantages over other packing materials, for example, suitable size to prevent blockage due to microbial growth, strong buffering capacity to neutralize acidic substances in the system, and a pH range of 7.0-7.2 suitable for the growth of bacteria. Dropwise trickling system offers an effective measure to easily control the moisture content of the bed and the reaction conditions (pH, nutrient) and to partially remove excess biomass produced during the metabolic processes of microorganisms. The influence of nutrient supplementation has also been investigated in this study, which has revealed that the biological system was in a condition of nutrient limitation instead of carbon limitation. The biofilters built in our laboratory were used to treat waste gas contaminated with toluene in a concentration range of 1 to 3.2 g/m3 and at the specific gas flow rate of 24 to120 m3/m2.hr. Under the conditions employed, a high elimination capacity (135 g/m3.hr) was obtained in the biofilter packed with peat beads (blended with 30% of the mineral material), and no blockage problem was observed in an experimental period of 2-3 months.

46 citations

Journal ArticleDOI
TL;DR: A hydrogenotrophic denitrification reactor was designed for the removal of nitrate from aquaria and an electrochemical cell was used to generate hydrogen gas to avoid the need for storage of large volumes of hydrogen gas in aquarium or aquaculture applications.

46 citations

Journal ArticleDOI
09 Sep 2011-Water
TL;DR: The work reviewed here was published between 2008 and 2010 and describes research that involved aerobic and anoxic biofilm treatment of water pollutants.
Abstract: The work reviewed here was published between 2008 and 2010 and describes research that involved aerobic and anoxic biofilm treatment of water pollutants. Biofilm denitrification systems are covered when appropriate. References catalogued here are divided on the basis of fundamental research area or reactor types. Fundamental research into biofilms is presented in two sections, Biofilm Measurement and Characterization and Growth and Modeling. The reactor types covered are: trickling filters, rotating biological contactors, fluidized bed bioreactors, submerged bed biofilm reactors, biological granular activated carbon, membrane bioreactors, and immobilized cell reactors. Innovative reactors, not easily classified, are then presented, followed by a section on biofilms on sand, soil and sediment.

46 citations

Journal ArticleDOI
TL;DR: A review of published and unpublished material on the function, microbiology, design and operation of trickling filters is given, followed by more general dynamic biofilm reactor modelling, i.e. models for rotating biological contactors, different types of biofilters, moving beds as well as Trickling filters.
Abstract: Tricking filters are biofilm reactors commonly used for biological removal of nitrogen and organic matter. A review of published and unpublished material on the function, microbiology, design and operation of trickling filters is given. This is followed by more general dynamic biofilm reactor modelling, i.e. models for rotating biological contactors, different types of biofilters, moving beds as well as trickling filters.

46 citations

Journal ArticleDOI
TL;DR: There is a move toward the renovation of wastewater treatment by the municipalities in the Mpumalanga Province with the adoption of biological treatment, and all the STPs reduced the turbidity of wastewater as well as the different microbial indicators counts; however, several pathogenic bacterial organisms could still be detected in the final effluent.
Abstract: In order to identify the treatment methods used in different sewage treatment plants (STPs) in the Mpumalanga Province and to determine the efficiency of wastewater treatment by these plants, municipal STPs were surveyed, and raw and treated wastewater samples collected. A total of 14 STPs were visited and the collected samples were analysed for physicochemical and microbiological parameters using standard methods. The treatment methods identified included ponds, activated sludge and trickling filters. The reduction of turbidity by the plants varied between 6.2 and 99.6% while conductivity, pH and temperature varied slightly between the influent and the effluent wastewater. Thirteen (92.8%) of the plants used chlorine for disinfection of the final effluent, however only 2 (14.2%) of the plants managed to produce effluent with 0 (zero) faecal coliforms per 100 m. Common pathogenic bacteria isolated from the final effluent included Salmonella, Shigella, Escherichia coli, Vibrio spp. and Enterococcus spp. The final effluent was used for irrigation and recycling purposes in 4 plants, all the other treatment plants discharged the effluent into the river or to the environment. The present study indicated that there is a move toward the renovation of wastewater treatment by the municipalities in the Mpumalanga Province with the adoption of biological treatment. All the STPs reduced the turbidity of wastewater as well as the different microbial indicators counts; however, several pathogenic bacterial organisms could still be detected in the final effluent. Further studies are needed to confirm the role of the treatment procedures on nutrient reduction and elimination of other viral and parasitic pathogens by the sewage treatment plants.

45 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202318
202229
202133
202034
201932
201826