Topic
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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TL;DR: Fluorescent in situ hybridization was used to quantify the ammonia‐oxidizing populations within intact biofilm samples collected from a full‐scale nitrifying trickling filter (NTF), suggesting that genera other than Nitrosomonas are present in this system.
Abstract: Fluorescent in situ hybridization (FISH) was used to quantify the ammonia-oxidizing populations within intact biofilm samples collected from a full-scale nitrifying trickling filter (NTF). Ammonia, nitrite, and nitrate concentrations were measured for aqueous samples taken in conjunction with biofilm samples at multiple filter depths. Correlation coefficients for individual sampling events, calculated by simple linear regression of FISH signal area and ammonia removal rates, ranged from 0.558 when using probe NEU23a to 0.982 when using probe Nso190. The improved correlations with Nso190 suggest that genera other than Nitrosomonas are present in this system. Percent biofilm coverage, as determined by 4',6-diamidino-2-phenylindole counterstaining and dry weight biomass measurements, did not change throughout the NTF. This indicates that biofilm growth is fairly uniform throughout the filter even if nitrifier growth is not.
43 citations
TL;DR: This study confirmed that MBBR nitrification start-up can be accelerated via TF and biocarrier transfer, and Interestingly, the transfer action increased the microbial diversity and made the biofilm physicochemical characteristics shift toward those of the MBBR.
43 citations
TL;DR: This is the first study attempting to combine bacteria and fungi for removal of H2S in a bio-trickling filter by adopting “three step immobilization method” and finding it to be a better choice for inoculation into a biological filter because of the quickly degradation of H 2S and rapid recovery under shut-down experiment.
43 citations
TL;DR: The first order plug flow kinetic model was effective at describing TKN and ammonium removal in the SSF and FWS wetlands when background concentrations were taken into account, suggesting that leachate TKN could contain refractory organics not found in domestic wastewater.
43 citations
TL;DR: Fitch et al. as discussed by the authors presented a review of biofilm treatment systems for the treatment of air pollutants and air pollution in drinking water treatment and distribution systems, which explicitly excluded research in medical biofilms, dental biofilm, biofilm causing corrosion and biofilm formation.
Abstract: Mark W. Fitch, Adriel Lam, Robert Segar INTRODUCTION Overview The work reviewed here was published during the catalogue/issue year 1999 and described research involving biofilms treating pollutants. This review explicitly excludes research in medical biofilms, dental biofilms, biofilms causing corrosion and biofilm formation in drinking water treatment and distribution systems. Anaerobic biofilm treatment system research is not reviewed here although a set of references is provided. However, the authors have included coverage of denitrification in traditional biofilm treatment systems. Similarly, biofilm systems for the treatment of air pollutants is reviewed in the Gaseous Emissions from Wastewater Facilities section of this issue. Coverage The references catalogued here are divided on the basis of fundamental research area or reactor type. Fundamental research into biofilms is presented in two sections, characterization/measurement and growth/modeling. References related to models of specific processes are included in the section on that technology. The reactor types which are covered are trickling filters, rotating biological contactors, fluidized bed biofilters (including airlift bioreactors), submerged bed bioreactors (including moving bed and floating bed bioreactors), biological activated carbon, membrane bioreactors, and immobilized cell bioreactors. Thereafter, innovative reactors which are not easily classified are presented, and an additional section on biofilms on sand, soil, and sediment is given. Reviews and Reactor Comparisons Stickler (1999) offered a review on the formation and maturation of biofilms, with emphasis on community coordination. Another review, with 35 references and written in Chinese, discussed biofilm formation, influencing factors, structure, composition, chemical and physical characteristics, biochemistry, and antibiotic resistance (Wang et al., 1999b). Barker and Stuckey (1999) reviewed soluble microbial products from wastewater treatment including the relation between such products and treatment processes. A review of small treatment systems (2,000 100,000 gpd) with nutrient removal requirements in Florida listed the estimated achievable performance limits for various suspendedand attached-growth technologies (Foess et al., 1999). Of the technologies studied, submerged biofilters and rotating biological contactors were ranked last as nutrient removal alternatives for these low flow plants. Four biological processes were compared for
43 citations