Trickling filter

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

Chapter 7 – Integrated biological treatment of olive mill waste combining aerobic biological treatment, constructed wetlands, and composting

Abstract: The biological treatment of olive mill waste has gained attention over recent years as it can achieve high removal efficiencies at relatively low cost. Several studies have proved that attached growth biological systems are efficient at treating olive mill wastewater as their high biomass concentration can tolerate substantial organic loadings without the appearance of toxic effects. Attached growth systems can remove the majority of the organic load; however, due to the extremely high organic load of olive mill wastewater, a posttreatment stage is imperative. Constructed wetlands are often currently used as a polishing treatment stage for olive mill wastewater. Furthermore, olive mills also produce significant quantities of solid residues that have proved to be excellent materials for composting. This chapter presents an integrated approach for the treatment of olive mill wastewater and solid residue that uses only biological treatments (i.e., trickling filters, constructed wetlands, and composting).

Recombinant DNA in wastewater: pBR322 degradation kinetics

Abstract: Despite intense interest in recombinant DNA and the environment, no published studies have examined the fate of recombinant DNA in wastewater. We have determined the kinetics of breakdown of pBR322 in a two-stage standard rate trickling filter plant. Samples were taken from four points within the plant (influent, primary clarifier, final clarifier, and effluent) and mixed with plasmid in vitro. No DNA has been released into the environment. Agarose gel electrophoresis was used to determine the conformational state of the plasmid

Biogas Production from Steam-Treated Municipal Solid Waste Wastewater

Abstract: Biogas production from steam process wastewater carrying the organic fraction of municipal solid waste (MSW) was investigated in a bench-scale system comprised of an anaerobic completely stirred tank reactor (AnCSTR), an anaerobic filter (AnF), and an aerobic trickling filter (ATF). The AnCSTR received rinse water that contains pulp fibers that are derived from MSW. The AnF received the same rinse water from MSW process wastewater; however, the pulp fibers were not present. The ATF received effluent from the AnCSTR and AnF in fed-batch mode. Biogas production was observed at 0.02–0.29 and 0.04–0.47 kg CH4 · m−3 day−1 in the AnCSTR and AnF systems, respectively. Chemical Oxygen Demand (COD) removal efficiency was observed at 20% in the AnCSTR and up to 86% in the AnF operating at 10- to 12-day hydraulic retention time (HRT). Introduction of digester sludge in the feed at day 173 (2 days HRT) increased gas production rate in the AnCSTR from 0.13 to 0.29 kg CH4 · m−3 day−1 but did not significantly affect ga...

A design model for nitrification on structured cross flow plastic media trickling filters

Abstract: An empirical model has been developed to predict the effluent ammoniacal nitrogen concentration from structured cross flow plastic media trickling filters operated over the range of BOD loadings 0.12-0.38 kg/m 3 /day and ammoniacal nitrogen loadings of 0.06-0.23 kg/m 3 /day. The model gives good predictions based on 24-h average effluent concentrations over a range of filter depths, organic and hydraulic loading rates. When incorporated with suitable hydraulic models, effluent ammoniacal concentration can be predicted through the diurnal range. The data gathering for the model included depth profiles on three filters. These have shown that at all but the very highest BOD loadings, nitrification commences from the very top of the filter in the presence of soluble BOD loadings previously thought to preclude the development of nitrifying biomass. Several reasons have been proposed to explain this, with the key argument being that the efficient oxygen transfer afforded by the media design is sufficient to satisfy heterotroph and autotroph oxygen demand simultaneously.