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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Patent•
06 May 1981
TL;DR: In this paper, a plant for effluent purification is described, which is composed of a mechanical clarification device for the mechanical purification of the waste water, an activation tank for a first activation stage, an intermediate clarification device, a nitrification stage equipped with a trickling filter apparatus, a denitrification stage, a secondary clarification tank and a device for conducting away and treating surplus sludge.
Abstract: The invention relates to a plant for purifying waste water (effluent). In its basic structure, the plant is composed of a mechanical clarification device for the mechanical purification of the waste water, an activation tank for a first activation stage, an intermediate clarification device, a nitrification stage equipped with a trickling filter apparatus, a denitrification stage, a secondary clarification tank and a device for conducting away and, if required, treating surplus sludge. The waste water to be purified passes from the mechanical clarification device into the activation tank and from the activation tank via the intermediate clarification device into the trickling filter apparatus and finally into the secondary clarification tank. The biocoenoses between activation tank and aeration tank are separate. The activation tank is designed as a very high loading activation tank. The trickling filter apparatus operates solely as a nitrification stage. Between the trickling filter apparatus and secondary clarification tank is arranged an unaerated mixing tank as a denitrification stage. Apart from water from the trickling filter stage, surplus sludge from the activation tank can be introduced into the mixing tank, by-passing the trickling filter stage. In order to operate the plant in such a way that it works with high purification efficiency in the purification of communal waste water, the activation tank of the first activation stage is installed for operation at an oxygen content of 0.5 to 1 mg/l and thus for partial oxidative degradation. Sludge supply in the intermediate clarification device can maintain the sludge in the first activation stage in the endogenous growth phase in which substrate respiration is established.
8 citations
TL;DR: In this article, the results of half-scaled and fullscaled experiments with activated sludge systems, fixed bed reactors prepositioned and postpositioned, were presented.
8 citations
TL;DR: The authors showed that paraffin-derived LAS surfactants can be removed nearly as efficiently as the rest of the organics contained in an institutional sewage, using a low-rate trickling filter.
Abstract: Field studies with a low-rate trickling filter have shown a paraffin-derived LAS surfactant to be removed nearly as efficiently as the rest of the organics contained in an institutional sewage. A nondomestic cracked-wax-derived LAS surfactant, which was fed over a second two-month period for reference purposes, was removed at a somewhat lower rate. These tests were conducted at the New Jersey Colony at New Lisbon during the period April to August, 1965.
8 citations
TL;DR: In this article, the authors developed a hybrid BSF system, called as a trickling biosand filter (TBSF), which is combined with rock media as trickling filter to reduce organic matters.
Abstract: Access to safe drinking water is still unavailable to many people in developing countries. Biosand filter (BSF) is one of the most promising emerging point of use technologies. A large amount of organic matters is contained in their water source. The purpose of this study is to develop a hybrid BSF system, called as a trickling biosand filter (TBSF), which is combined with rock media as trickling filter to reduce organic matters ranged from CODcr 50 to 150 mg/L in source water. The effects of TBSF and BSF on the factors as CODcr, flux, turbidity, and DO are analyzed. Results showed that the effluent CODcr of TBSF was obtained 2.3–4.2 mg/L during 41 d. However, that of BSF fluctuated within 13.1–28.6 mg/L. DO in standing water of TBSF increased to average 7.8 mg/L while that of BSF decreased to average 1.2 mg/L. DO played an important role to activate microbial activity in trickling filter and to ripen Schmutzdecke layer to decrease constantly turbidity and Escherichia coli (E. coli) in TBSF, thoug...
8 citations
TL;DR: Biodegradable DON is a portion of DON that is biologically degradable by bacteria when the optimum environmental conditions are met, and all four computing techniques could be employed successfully to predict BDON.
Abstract: Wastewater-derived dissolved organic nitrogen (DON) typically constitutes the majority of total dissolved nitrogen (TDN) discharged to surface waters from advanced wastewater treatment plants (WWTPs). When considering the stringent regulations on nitrogen discharge limits in sensitive receiving waters, DON becomes problematic and needs to be reduced. Biodegradable DON (BDON) is a portion of DON that is biologically degradable by bacteria when the optimum environmental conditions are met. BDON in a two-stage trickling filter WWTP was estimated using artificial intelligence techniques, such as adaptive neuro-fuzzy inference systems, multilayer perceptron, radial basis neural networks (RBNN), and generalized regression neural networks. Nitrite, nitrate, ammonium, TDN, and DON data were used as input neurons. Wastewater samples were collected from four different locations in the plant. Model performances were evaluated using root mean square error, mean absolute error, mean bias error, and coefficient...
8 citations