Showing papers on "Trickling filter published in 1976"
TL;DR: In this paper, a well established model for microbial film growth in trickling filters has been used to study the influence of sloughing on the performance characteristics of traning filters under conditions of constant input.
50 citations
TL;DR: In this article, a circular tube containing flowing liquid forms the basis of the mathematical model permitting the determination, by use of experimental macroscopic data, of the reaction rate between dissolved oxygen and a thin layer of microorganisms attached to the wall within the system.
2 citations
01 Jan 1976
TL;DR: A dual media filtration study was carried out at the Central Weber Wastewater Treatment Plant in Ogden, Utah, to evaluate its feasibility as a tertiary treatment to meet new effluent quality standards.
Abstract: A dual media filtration study was carried out at the Central Weber Wastewater Treatment Plant in Ogden, Utah, to evaluate its feasibility as a tertiary treatment to meet new effluent quality standards. A review of the literature indicated that dual media fIlters were more efficient than conventional single media sand ftlters because of the "in depth" filtration achieved by dual media fIlters. An experimental filter was operated at four different hydraulic loading rates, ranging from 3 to 6 gpm/ft2 (122.l0 to 244.20 l/min/m2), to evaluate its effects on effluent quality. Hydraulic loading rate was shown not to affect suspended solids removal. The experimental filter produced excellent suspended solids removal; however, BODs removal efficiency was relatively poor because the influent to the filter contained high concentrations of soluble BODs and colloidal organic solids. Filter effluent quality met State of Utah standards of 10 mg/l of BODs at the hydraulic loading rate of 3 gpm/ft2 and exceeded the standard by less than 2 mg/l at loading rates of 4, 5, and 6 gpm/ft2. Filter cycle durations were very short at higher fIltration rates due to removal of influent suspended solids in the intermixed portion of the filter media. Biological growth within the filter media was a major problem in the operation of the filter. The fIlter influent was chlorinated to prevent this growth. The study indicated that dual media fIltration of trickling filter plant effluent to meet new effluent quality standards is economically feasible and can produce an effluent which meets state and federal standards.
2 citations
01 Jan 1976
TL;DR: The treatment of sugar mill effluent in biological trickling filters at Felixton mill is described in this article, where the performance of the plant over the past three seasons is discussed.
Abstract: The treatment of sugar mill effluent in biological trickling filters at Felixton mill is described. The performance of the plant over the past three seasons is discussed. Initial performance was poor and details are given of the steps taken to produce a consistently acceptable final effluent.
1 citations
TL;DR: In this article, an activated sludge-trickling filter or trickling filter-activated sludge processes were used on a pilot-plant scale as a means of upgrading trickling-filter plants treating domestic wastewater.
Abstract: Activated sludge processes were used on a pilot-plant scale as a means of upgrading trickling filter plants treating domestic wastewater. Parallel use of units provided increased hydraulic capacity and produced effluent BOD concentrations consistently below 25 mg/l. Series activated sludge-trickling filter or trickling filter-activated sludge processes produced effluent BOD consistently below l5 mg/l. This performance was maintained in all cases when operating at organic loadings up to about 50 lb BOD/day/1,000 cu ft (0.80 kg/day/m³) of treatment unit volume.
1 citations