Trickling filter

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

Dynamic Simulation of Trickling Filter Process with Hydraulic Stress Tests

Abstract: Trickling filter process is focused on developing Asian countries in recent years as an alternative energy-saving wastewater treatment to conventional activated sludge systems. This paper investigated influential hydraulic operational parameters on the process performance using a nitrification reactor. The trickling filter process was expressed as 2-dimensional biofilm layers where the influent flowed to the bottom of the filter bed while oxygen was dissolved from the ambient air. The 4 m-height pilotscale trickling filter filled with tubular plastic media (1.5 cm × 1.5 cm, 371 m2/m3-reactor volume) was installed at a municipal wastewater treatment plant in Da Nang, Vietnam. During the 2-day hydraulic stress test, the nitrogen and hydraulic loadings were changed in a step-wise manner. Focusing on the nitrification which was a dominant oxygen uptake, the process performance was dynamically simulated with a modification of IWA Activated Sludge Model (International Water Association). The effluent concentrations of dissolved oxygen and inorganic soluble nitrogenous compounds were reasonably calculated under the hydraulic loading ranging between 2.4 and 18 m/h. The reactive wetted surface area of the filter seemed to increase when high linear velocity of the fluid was applied, which resulted in the increase of volumetric biological reaction rates.

Treatment plant for wastewater

Abstract: In a treatment plant for wastewater, there are provided, in a shared housing 2, a chamber 3 for a trickling filter 4, a final clarification tank 10 and, separated from these by a wall 15, a pump chamber 5. In the final clarification tank 10 which is disposed immediately under the chamber 3 for the trickling filter 4, there is provided a pump 25 from which there departs a line 26 which leads to a digestion chamber which is connected upstream of the trickling filter 4. From the final clarification tank 10 wastewater flows through an overflow 17 in the wall 15 into the pump chamber 5. In the pump chamber 5 there is provided a pump 28 from which a line 29 departs which leads to a soil filter chamber. In this line 29 is provided a three-way valve 30 from which a pipe branch 31 departs which ends above the trickling filter 4.

Method for improving purification of insoluble organic waste gas of biological trickling filter tower

Abstract: The invention provides a method for improving purification of insoluble organic waste gas of a biological trickling filter tower, belonging to the technical field of biological purification of the organic waste gas The method is characterized in that spray liquid of the biological trickling filter tower is prepared by adopting commercial industrial non-ionic surfactant-polyoxyethylene sorbitan monooleate (Tween 80), the biological trickling filter tower is the original traditional commonly used device, and the method can be operated by utilizing the device The process parameters during the operation process are as follows: the concentration of the Tween 80 is 50-80mg/L, the residence time of the gas in the biological trickling filter tower is 30-60s, and the spray density of the spray liquid is 02m /m d The method can effectively improve the purification effect of the insoluble organic waste gas of the biological trickling filter tower, shorten the startup time of a trickling filter bed, facilitate the operation and reduce the cost

Open trickling filter: an innovative, cheap and simple form of post-treatment of sanitary effluents from anaerobic reactors in small communities

Abstract: We aimed to evaluate the performance and cost savings of an innovative design of a trickling filter (TF) for small population sizes, developed at the Federal University of Minas Gerais, Brazil referred to as an open trickling filter ( OTF ). The OTF had no side walls and no perforated bottom slab, and was applied for the post-treatment of sanitary sewage from an upflow anaerobic sludge blanket (UASB) reactor. The OTF had crushed-stone packing (3.5 m high) and was operated with an average surface hydraulic loading rate of 4.1 m 3 m -2 d -1 and an average volumetric organic loading rate of 0.10 kg BOD m -3 d -1 (biochemical oxygen demand). The average concentrations obtained at the OTF effluent were 48 mg TSS L -1 (total suspended solids), 132 mg COD L -1 (chemical oxygen demand), 51 mg BOD L -1 , 19 mg TKN L -1 (total Kjeldahl nitrogen), 16 mg NH + 4 -N L -1 and 10 mg NO - 3 -N L -1 , complying with local discharge standards. Analysis of the construction costs indicated savings of 74% compared to conventional TF. Based on the performance, compactness, simplicity and reduced capital costs, it is believed that the proposed OTF is a good alternative for small communities, especially in developing countries.