2 edition of Fine solids removal following combined chemical-trickling filter treatment found in the catalog.
Fine solids removal following combined chemical-trickling filter treatment
James Clement Brown
1980 by Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Available to the public through the National Technical Information Service in Cincinnati, Springfield, Va .
Written in English
|Statement||by James C. Brown|
|Series||Research reporting series -- EPA-600/2-80-099|
|Contributions||UNC Wastewater Research Center, Municipal Environmental Research Laboratory, Municipal Environmental Research Laboratory. Wastewater Research Division|
|The Physical Object|
|Pagination||x, 26 p. :|
|Number of Pages||26|
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Environmental Protection Agency ; Springfield. stage process. As a result, high-rate filters are often used with combined processes.
Roughing Filters Roughing filters are designed to allow a significant amount of soluble BOD to bleed through the trickling filter. Filters of this type generally have a design load ranging from kg BOD 5 3m-d ( to lb. BOD 5cu ftday. A large number of slime samples from six different trickling filter plants in the Milwaukee area were analyzed with the results that the volatile solids were mostly in the 70 to 80 range, phosphorus in the 2 to 3 range, nitrogen in the 6 to Q range and carbon in the 40 to 50S range.
Trickling Filters are a unique type of fixed film biological treatment. In a trickling filter, the micro-organisms used to treat the wastewater are attached, or fixed, to a medium as they contact the wastewater.
These micro-organisms form a slime growth on the medium known as zoogleal film. In most wastewater treatment systems, the trickling filter follows primary treatment and includes secondary settling tank or clarifier as shown below.
The process is a fixed film biological treatment method designed to remove BOD and suspended solids. The trickling filter consists of several major components including distribution system, media.
It is a unit operation that is used to remove solids from wastewater in preliminary or primary treatment. Openings of fine screens typically vary from to 6 mm. Fine screens sometimes are used as a substitute for primary clarifier upstream of a trickling filter.
() A survey of combined trickling filter and activated sludge processes. with strict limits and achieve high levels of treatment. Trickling filters will be in usage for years from now on. The terms trickle filter, trickling biofilter, biofilter, biological chemicals.
There are mainly three types of filter media: Rock (or slag) sedimentation tank for the removal of most of the stabilized solids present in. TABLE 1 PERFORMANCE OF CONVENTIONAL GRAVITY THICKENING Type of Solids Primary (PRI) Trickling Filter (TF) Rotating Biological Feed (TS) Thickened Solids (TS) Contactor (RBC) Waste Activated Solids (WAS) PRI WAS PRI TF PRI RBC PRI Lime PRI (WAS Iron) PRI (WAS Aluminum salts) Anaerobically digested PRI WAS 3.
is a platform for academics to share research papers. downstream to remove the suspended solids from the effluent. Effluent recycle can also by use in the operation of trickling filter to dilute the concentration of the pollutants in the incoming streams.
Sedimentation tank is employed prior to trickling filter, the detention time for which is reduced to hours only due to addition of reagents. Solids heavier than water sink to the bottom and grease and fine solids rise to the surface.
A skimmer is used to remove grease and scum off the top and a scraper to remove sludge from the bottom. Typical biological oxygen demand (BOD) removal is from 25 to 40 and soluble solids (SS) removal is 5070.
IntroductionThe trickling filter solids contact ͑TFSC͒ process consists of a trickling filter, where a major part of the soluble chemical oxygen demand ͑COD͒ is removed, and a solids contact tank, where further oxidation of the remaining dissolved COD and biological flocculation of the particulate COD contained in the trickling filter effluent take place.
Operation of Municipal Wastewater Treatment Plants WEF Manual of Practice No. Chapter 21-Trickling Filters, Rotating Biological Contactors, and Combined Processes. Sixth Edition. Prepared by the Operation of Municipal Wastewater Treatment Plants Task Force of the Water Environment Federation.
Michael D. Nelson, Chair. Howard Analla. - Free ebook download as Excel Spreadsheet. xls), PDF File. pdf), Text File. txt) or read book online for free. project details Part B. Consider the design of a wastewater treatment plant (WWTP) for a community with average daily and peak hourly wastewater design flows of MGD and MGD.
The raw sewage has an average of mgL BOD5 and mgL of suspended solids. After screening and grit removal, the WW is to be treated by primary sedimentation in two. Hence, Diameter of trickling filter m Example: 3 Design high rate trickling filter for the data given above except effluent BOD5 40 mgl since polishing treatment is provided after high rate trickling filter.
Consider recirculation ratio of 2 and filter depth of m. 2Q, BOD 40 TF SST. The Ovivo ® rotary distributor filters screened and settled wastewater through a bed of rock or plastic to reduce the biological oxygen demand (BOD) to acceptable levels. Microorganisms attach to the media and consume the waste that contacts the surface as the liquid trickles through the media.
Basic applications for rotary distributors include low and high rate trickling filter processes. A trickling filter is a type of wastewater treatment system.
It consists of a fixed bed of rocks, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward and causes a layer of microbial slime to grow, covering the bed of media.
Aerobic conditions are maintained by splashing, diffusion, and either by forced-air.