Trickling filter

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

Removal of toluene in gas streams by a fibrous-bed trickling filter.

Abstract: A novel fibrous-bed trickling filter was developed to remove toluene present in contaminated air. Pure culture of Pseudomonas putida F1 was attached on fibrous-bed and utilized toluene as the carbon source. Experimental results indicated the removal efficiency decreased with the increase of inlet concentration. In general, the removal efficiency of toluene was greater than 90% when the inlet loading capacity was below 70 g m−3h−1. The elimination capacity increased with increasing inlet loading capacity, but the increased rate decreased gradually. When the inlet loading capacity increased to 300 g m−3h−1, the elimination capacity could approach to 130 g m−3h−1. The first order kinetics model was useful to describe the removal of toluene in this filter and an excellent linear relationship was found between the apparent first order parameter and inlet concentration (ranging from 1.2 g m−3 to 3.5 g m−3). Also, the performance of fibrous-bed trickling filter was relatively stable during the four-month period ...

Biological Fixed-Film Systems

Abstract: INTRODUCTION Overview. The work reviewed here was published during 2003 and described researches that involve 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 Processes is a separate section of this issue, therefore, anaerobic biofilm treatment systems research is not reviewed here. However, denitrification in biofilm treatment systems is covered when appropriate. Similarly, biofilm systems for the treatment of air pollutants are not covered in this section (subject of the Gaseous Emissions from Wastewater Facilities section). Coverage. The references catalogued here are divided on the basis of fundamental research area or reactor types. Fundamental research into biofilms is presented in two sections, characterization/measurement and growth/modeling. The reactor types that are covered are trickling filters, rotating biological contactors, fluidized bed and airlift bioreactors, submerged bed biofilm reactors, biological granular activated carbon, membrane bioreactors, and immobilized cell reactors. Thereafter, innovative reactors that are not easily classified are presented, and an additional section on biofilms on sand, soil, and sediment is given.

Biotechnological Removal of Ethene from Waste Gases

Abstract: Publisher Summary This chapter presents preliminary results regarding ethene removal from waste gases with a conventional trickling filter. It also discusses the possibility of adding an organic solvent as an ethene vector to increase the sorption of ethene. Biological waste-gas treatment can be an alternative for physico-chemical treatment, but the use of biological systems may become critical, as the organic compound becomes less water soluble. Experiments are carried out in a continuously operated lab-scale trickling filter. The trickling filter consists of a rectangular shaped plexi-glass column. The preliminary results show that the biomass growth on the packing material could be enhanced by loading the trickling filter with a secondary ordinary carbon source through the liquid circuit. The use of a solvent to increase the sorption of ethene is probably not possible, because ethene shows a low solubility in organic solvents. In addition, the use of a solvent to increase the sorption of ethene is probably not possible, because ethene shows also a low solubility in organic solvents.

Non-invasive and continuous monitoring of a pilot-scale trickling filter: Weight, off-gas and hydraulic characterization.

Abstract: A pilot-scale trickling filter has been constructed in order to collect experimental data on a fully characterized biofilm system for the selection, development, calibration and corroboration of mathematical models which describe such a system’s dynamic behavior The design of the unit was made such that it allows a full characterization of the relevant model parameters, and an easy monitoring of the system’s performance only using measurements of inflow and outflow By means of an electronic balance, the weight of the filter unit is continuously monitored It is shown that information about the filter’s weight can be used to accurately determine biofilm and hydraulic characteristics Also the off-gas is continuously monitored for CO2 and O2 These measurements allow to establish closed carbon and oxygen mass balances Several short term experiments are conducted to reveal the possibilities of off-gas analysis to monitor, model and control the filter’s performance Two tracer tests were conducted on the filter without and with biofilm NaCl and Thioflavine-S were used as a tracer The hydraulic behavior of the filter without biofilm could be described using an advection-dispersion model If a biofilm was present however, a CSBR (continuously stirred biofilm reactor) approach was found to yield an optimal description of the hydraulics