Trickling filter

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

Integrated sewage treatment device

Abstract: The utility model discloses an integrated sewage treatment device, which substantially comprises an anaerobic settling tank, an anaerobic biological filter, a water distributor, an efficient facultative anaerobic biological trickling filter and a tidal type oxidation ditch, and the anaerobic settling tank, the anaerobic biological filter, the water distributor, the efficient facultative anaerobic biological trickling filter and the tidal type oxidation ditch are orderly connected. The integrated sewage treatment device uses an integrated working process by adopting an anaerobic-facultative anaerobic-aerobic mode, and an anaerobic segment tries to use an anaerobic contact process to treat low concentration domestic sewage. The tidal type oxidation ditch recovers oxygen for surfaces of granular filter materials by utilizing changing of tides of time interval through controlling of a constant depth automatic drainer, enables oxygen dissolution quantity in the tidal type oxidation ditch to be greatly increased, increases microbial aerobic oxidation degree, and is less in odor yield. The integrated sewage treatment device has the advantages of reasonable connection, no dead corner, full reaction, difficult blocking and easy cleaning.

Biodegradable Dissolved Organic Carbon in Trickling Filter and Activated Sludge Wastewater Treatment Plants

Abstract: The chemical composition of wastewater derived dissolved organic carbon (DOC) is complex and consists of moderate and high molecular weight organic compounds with different levels of biodegradability. Biodegradable DOC (BDOC) is a portion of DOC that can be mineralized by an acclimated mixed bacterial culture. DOC and BDOC data were collected along the treatment trains of two wastewater treatment plants (WWTPs) with a two-stage trickling filter (TF) system and an activated sludge (AS) + moving bed bioreactor (MBBR) system. Results showed that BDOC varied significantly within the treatment facility and between the two facilities.From primary clarifier to final effluent, the TF plant removed about 90% of BDOC, while the AS + MBBR plant removed about 80% of BDOC. Effluent BDOC to effluent DOC ratio(biodegradability) for the TF plant was73% while it was 63% for the AS + MBBR plant.

New Process Design Procedure for Dealing with Variable Trickling Filter Effluent Suspended Solids

Abstract: Based on a survey which showed that seven of eight conventional trickling filter (CTF) plants exceeded the U.S. Environmental Protection Agency secondary treatment regulatory requirements, a new design procedure is proposed. It recognizes that bioflocculation within CTFs is poor and that most of the effluent violations seen in the survey could be related directly or indirectly to the level of effluent suspended solids. In past practice, process design focus has been on soluble or settled effluent biochemical oxygen demand ( BOD5 ) rather than the effluent suspended solids. The principal focus in CTF process design should be on predicting effluent suspended solids (SS) after secondary clarification, rather than effluent carbonaceous BOD5 . If the total organic loading (TOL) is set in the proper range, the effluent carbonaceous BOD5 is primarily determined by the effluent SS. A new design procedure has been developed that identifies the highest TOL that can be sustained without posing a constraint on efflue...

Trickling filtration technique and device for effectively removing nitrate nitrogen in high-nitrogen low-carbon environment

Abstract: The invention discloses a trickling filtration technique and device for effectively removing nitrate nitrogen in a high-nitrogen low-carbon environment. The trickling filtration technique comprises the following steps: sewage is firstly lifted to the top of a trickling filter to implement uniform water distribution, wherein the treatment water temperature is not lower than 8 DEG C, the height of the filter layer is 1.2-1.5m, and the filter layer is filled with a sulfur-limestone mixed filler; and in an anoxic state, the sewage passes through the filter layer, and finally submerges the effluent at the bottom of the filter material. According to the characteristics of higher nitrate nitrogen content and lower carbon-nitrogen ratio in the sewage, the trickling filtration technique is improved, the filler is improved, the parameters are adjusted, and the trickling filter is improved; the water is uniformly distributed on the top of the filter tank, penetrates through the special denitrification filter layer, and submerges the effluent at the bottom of the filter material; and in the anoxic state, sulfur autotrophic nitrobacteria are utilized to oxidize the sulfur into sulfates and reduce the nitrate nitrogen into nitrogen, thereby finally achieving the goal of efficiently removing nitrate nitrogen and greatly relieving the environmental pressure.

Nanoparticles in Constanta-North Wastewater Treatment Plant

Abstract: In this paper we describe the route of the nanoparticles in the WWTP and demonstrate how to use the simulation flow sensitivity analysis within STOATTM program to evaluate the effect of variation of the constant, “k” in the equation v= kCh settling on fixed concentration of nanoparticles in sewage water from a primary tank of physical-biological stage. Wastewater treatment facilities are designed to remove conventional pollutants from sanitary waste. Major processes of treatment includes: a) physical treatment-remove suspended large solids by settling or sedimentation and eliminate floating greases; b) biological treatment-degradation or consumption of the dissolved organic matter using the means of cultivated in activated sludge or the trickling filters; c) chemical treatment-remove other matters by the means of chemical addition or destroying pathogenic organisms through disinfection; d) advanced treatment- removing specific constituents using processes such as activated carbon, membrane separation, or ion exchange. Particular treatment processes are: a) sedimentation; b) coagulation and flocculation; c) activated sludge; d) sand filters; e) membrane separation; f) disinfection. Methods are: 1) using the STOATTM program with input and output data for primary tank and parameters of wastewater. 2) generating a data file for influent using a sinusoidal model and we accepted defaults STOATTM data. 3) After this, getting spreadsheet data for various characteristics of wastewater for 48 hours:flow, temperature, pH, volatile fatty acids, soluble BOD, COD inert soluble particulate BOD, COD inert particles, volatile solids, volatile solids, ammonia, nitrate and soluble organic nitrogen. Findings and Results:1.Graphics after 48 hour;. 2.Graphics for parameters - flow,temperature, pH/units hours; 3.Graphics of nanoparticles; 4. Graphics of others volatile and non-volatile solids; 5. Timeseries data and summary statistics. Biodegradation of nanoparticles is the breakdown of organic molecules that may cause changes in the physical structure or the surface characteristic of the material. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.