Trickling filter

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

Apparatus for treating waste water with trickling filter

Abstract: PROBLEM TO BE SOLVED: To obtain an apparatus for treating waste water with trickling filters, which can be made compact by accelerating a biological reaction rate and in which aeration energy can be not required. SOLUTION: The apparatus for treating waste water with trickling filters, in which contact materials for biological treatment are arranged, has an anaerobic part 13 including a first contact material 15, an aerobic part 14 including a second contact material 16, and a means 27 for transferring the heat of reaction generated by a biological reaction in the aerobic part 14 to the anaerobic part 13. It is suitable that the anaerobic part 13 is arranged in the upper portion of the same treatment tank and the aerobic part 14 is arranged in the lower portion thereof. COPYRIGHT: (C)2011,JPO&INPIT

Fate of As, Se, and Hg in a Passive Integrated System for Treatment of Fossil Plant Wastewater

Abstract: TVA is collaborating with EPRI and DOE to demonstrate a passive treatment system for removing SCR-derived ammonia and trace elements from a coal-fired power plant wastewater stream. The components of the integrated system consist of trickling filters for ammonia oxidation, reaction cells containing zero-valent iron (ZVI) for trace contaminant removal, a settling basin for storage of iron hydroxide floc, and anaerobic vertical-flow wetlands for biological denitrification. The passive integrated treatment system will treat up to 0.25 million gallons per day (gpd) of flue gas desulfurization (FGD) pond effluent, with a configuration requiring only gravity flow to obviate the need for pumps. The design of the system will enable a comparative evaluation of two parallel treatment trains, with and without the ZVI extraction trench and settling/oxidation basin components. One of the main objectives is to gain a better understanding of the chemical transformations that species of trace elements such as arsenic, selenium, and mercury undergo as they are treated in passive treatment system components with differing environmental conditions. This progress report details the design criteria for the passive integrated system for treating fossil power plant wastewater as well as performance results from the first several months of operation. Engineering work on more » the project has been completed, and construction took place during the summer of 2005. Monitoring of the passive treatment system was initiated in October 2005 and continued until May 18 2006. The results to date indicate that the treatment system is effective in reducing levels of nitrogen compounds and trace metals. Concentrations of both ammonia and trace metals were lower than expected in the influent FGD water, and additions to increase these concentrations will be done in the future to further test the removal efficiency of the treatment system. In May 2006, the wetland cells were drained of FGD water, refilled with less toxic ash pond water, and replanted due to low survival rates from the first planting the previous summer. The goals of the TVA-EPRI-DOE collaboration include building a better understanding of the chemical transformations that trace elements such as arsenic, selenium, and mercury undergo as they are treated in a passive treatment system, and to evaluate the performance of a large-scale replicated passive treatment system to provide additional design criteria and economic factors. « less

Efficient household garbage sewage system and technology thereof

Abstract: The invention relates to an efficient household garbage sewage system, in particular to an efficient household garbage sewage system and a technology thereof. The efficient household garbage sewage system comprises a raw water tank, a regulating tank, high voltage dissolved oxygen electric flocculation equipment, an advanced oxidation pot, a reoxidation pot, a solid-liquid separation device, multi-phase coupling electrochemical equipment, a solid-liquid separation device II, an anaerobic pot, a biological catalytic oxidation pot, a trickling filter tower and the like. The system adopts common equipment mostly, the construction cost of the whole system is low, transformation also can be directly carried out on the basis of an old sewage treatment system, full catalytic oxidation and flocculation are carried out during primary treatment of raw water by utilizing a multi-phase coupling electrochemical technology carried out under the condition that the raw water is acidic, energy consumption is basically concentrated on the aspects of water pumps, gas supply and electrolysis, and seen from the whole system, the proportions of the water pumps, gas supply and electrolysis in the whole system are extremely low, so that energy consumption is extremely low; and the treatment cost per ton of water is extremely low, so that the applicability of the system provided by the invention is greatly improved.