Introduction to trickling filters and rbcs study guide september 1995 edition. Simultaneous organic and nutrients removal in a mineral. Effluent quality achieved with the new activated sludge systems was often better than those achieved. Trickling filtration is a biological treatment technology which potentially. Trickling filters trickling filter is an attached growth process i. Describe the effect of algae growth on the media of a trickling filter and a rbc. Lecture notes water and wastewater treatment engineering. 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. Trickling filters the water and carbon groupthe water. Trickling filteractivated sludge combinations for domestic. A trickling filter tf is one of the oldest biological wastewater technologies that has been used for over 100 years. The first trickling filter used for a large public treatment system was installed in madison.
Wastewater technology fact sheet trickling filters description trickling filters tfs are used to remove organic matter from wastewater. Review of technologies for the onsite treatment of. The tank is either rectangular or square if fixed nozzles are used and circular in shape if rotary distributors are used. Explain the purpose served by the media in a trickling filter and on a rbc. Modifications to highrate trickling filter process october 1970 research project 681 reprinted with permission of metcalf a body. Waste treatment obtained with upgraded trickling filters, civil engineering. The trickling filter was one of the first biochemical operations developed to treat municipal and industrial wastewater. Solution the five large trickling filter recirculation pumps 150200 hp each and two humus return pumps 40 hp each were paired with adjustable frequency drives to pace flow based on process requirements and reduce energy consumption.
Cost comparison of trickling filtration and activated. Attached growth system sewage treatment civil engineering. This type of system is common to a number of technologies such as rotating. Pdf trickling filter for high efficiency treatment of dairy sewage. Filter project report content evaluation criteria fall 2017.
Water filter project water filter project rdw, inc. Part of the civil and environmental engineering commons, and the oil, gas, and. The tf is an aerobic treatment system that utilizes microorganisms attached to a medium to remove organic matter from wastewater. Depending upon the dosing system, wastewater is applied intermittently with rest periods which generally do not exceed five minutes at the designed rate of waste flow. With years of evolution, modern trickling filters can be built up to 12 m 40. A high specific surface provides a large area for biofilm formation. The tricklingfilter system and the activatedsludge system both require a. The trickling filter can treat grey and black domestic wastewater or equivalent. Aug 19, 2017 enrol today in our site and get access to our study package comprising of video lectures, study material, practice questions and test series with doubt support for civil. This passive aeration mechanism is the underlying reason why trickling filters are not dependent on energy intensive. Trickling water filters water treatment waste water. In trickling water filter there is no straining or filtering action involved.
With the introduction of plastic filter media to replace the rock media, speed control, and more reliable rotary distributor mechanisms, the performance of trickling filters has been greatly enhanced. Upgrading army sewage treatment plant trickling filters. Trickling filters are conventional aerobic biological wastewater treatment units, such. Trickling systems are the backbone of the armys wastewater treatment system and will. Trickling filters are conventional aerobic biological wastewater. Constant flow improved efficiency, as for all biological wastewater treatment and activated sludge process. Cost comparison of trickling filtration and activated sludge. Packing material used in attached growth processes include rock, gravel, slag, sand, redwood, and a wide range of plastic and other synthetic materials. This packing material can be rock, gravel, sand and a. Construction, office of the chief of engineers oce, under project. Water filter project the objective of this project. The tf is an aerobic treatment system utilizing microorganisms attached to a media to remove organic matter from wastewater that passes over, around, through, or by the media. A timetested technology, trickling filters offer a simple, costeffective, energyefficient treatment solution. Protozoa a group of motile, microscopic organisms that sometimes cluster into colonies and generally consume bacteria as an energy source.
Paul guyer is a registered mechanical engineer, civil engineer, fire protection engineer and architect with over 35 years experience in the design of buildings and related infrastructure. The proposed three step methodology is shown in figure 1. This design memorandum dm covers the basis of design to build a twophase project to replace the existing trickling filtersolids contact tfsc process with a conventional activated sludge secondary process to achieve nutrient removal. With proper loadings the lowrate trickling filter, including primary and secondary sedimentation units, should remove from 80.
An introduction to secondary wastewater treatment j. Trickling filter technology for treating abattoir wastewater. Trickling filter classification and mechanism engineering. Filled pilot scale trickling filter treating brewery wastewater. Trickling filter and trickling filtersuspended growth process design and operation. Trickling filter also known as percolating or sprinkling filter is like a well having depth up to about 2m and filled with some granular media. The trickling filter plant is a very flexible solution, that can be used for small and medium civil settlements or for single or double family houses. Settled sewage is sprayed over the bed surface and is further purified as it trickles downward, coming in contact with filmy layers of microorganisms slime attached to the media.
What every operator should know about trickling filters. It consists of a fixed bed of rocks, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic. The fixed media in trickling water treatments filter may be of rocks, plastic, metal, etc. Civil engineer needed for construction, professional service. Typical flowchart of a trickling filter system including a pre and post treatment. It has good adaptability to handle peak shock loads and the ability to function satisfactorily after a short period of time. A condition occurring on trickling filters when the hollow spaces become plugged to the extent that water passage through the filter is inadequate. Trickling filter is a type of waste water treatment process, which is an attached growth process. A trickling filter is a type of wastewater treatment system. Trickling filters are designed to maintain aerobic conditions by maintaining free draining conditions within the filter, and drawing air into the system through the updraft from ventilation holes at the base of the tank.
With time, the biomass will grow thick and the attached layer will be deprived of oxygen. Trickling filter example problems waste water engineering. In this process the microorganisms responsible for digestion are attached to an inert filter material. Trickling filters are also called percolating filters. A modern trickling filter consists of a bed of highly permeable media to which microorganism are attached and sewage percolates or trickle down and hence the name trickling filter. A trickling filter system must include a lowvelocity, open channel between a trickling filter and final clarifier for manual removal of snails. If an existing wastewater treatment facility is materially altered, any mercury seal in a trickling filter. Submitted in partial fulfilment of requirements for the degree master of science in civil. With more than 500 trickling filter installations worldwide, brentwoods media and components have been optimized to guarantee the best performance for any application.
A trickling filter must be designed to prevent corrosion. Civil engineering department, dronacharya college of engineering, farrukh nagar, gurgaon, haryana, india. Water filter project the objective of this project is to design and. This packing material can be rock, gravel, sand and a wide range of plastic and other synthetic materials. Pdf trickling filter and trickling filtersuspended. Typical flow chart of a trickling filter system including a pre and post treatment. This project is to evaluate the potential for application of alternative treatment. Trickling filter sswm find tools for sustainable sanitation and. Because trickling filter technology has historically been used for municipal wastewater treatment, the design parameters found in the literature are based on. Trickling filter treatment solutions brentwood industries. The objective of the project is complete removal of bodcod and color of distillery spent wash by using combined anaerobic digestion and advanced oxidation. Enrol today in our site and get access to our study package comprising of video lectures, study material, practice questions and test series with doubt support for civil. Flowchart of a centralised trickling filter system where the faecal sludge is treated by anaerobic digestion. With proper loadings the lowrate trickling filter, including primary and secondary sedimentation units, should remove from 80 to 85 percent of the applied bod.
Biotreatment of winery wastewater using a hybrid system. An introduction to trickling filter wastewater treatment. Comparison of plastic trickling filter media for the. The objective of the project is complete removal of bodcod and. Civil engineer needed for construction, professional service providers required. Conventional trickling filter or ordinary trickling filter. Wastewater treatment plants, provides design theory for trickling filters, as do published. Nitrogen content in wastewater nitrogen exists in many forms in the environment and can enter aquatic systems from either natural or humangenerated sources.
Media filters use microorganisms that are attached to a high surface area medium to primarily remove soluble organic matter measured as biochemical oxygen demand bod or chemical oxygen demand cod from wastewater as it passes through the medium. Aug 21, 2017 this video covers some of the solved problems related to trickling filter design along with some design data for the same. A trickling water treatment filter tf, an attached growth system, consists of a fixed bed of highly permeable media on whose surface a mixed population of microorganisms is developed as a slime layer. A trickling filter system must be designed to prevent sludge accumulation that attracts snails.
The project was part of the fy87 facilities technology applications test. Lecture notes water and wastewater treatment engineering civil. This video covers some of the solved problems related to trickling filter design along with some design data for the same. Each system is a part of a complete treatment scheme for. Dec 03, 2016 classification of tfs based on organic loadings low rate or standard rate trickling filters. An introduction to trickling filter wastewater treatment plants course no. Trickling filter sizing using nrc equation a municipal ww having a bod of 250 gm3 is to be treated by a twostage trickling filter. This project was initiated by fox to obtain additional grant funds for green energy efficiency. Advantages and disadvantages of trickling filter water. Discuss the types of waste treated by a trickling filter and a rbc. Trickling filters sewage treatment reverse osmosis. Department of civil engineering, democritus university of thrace, gr67100 xanthi.
Trickling filter, in wastewater treatment, a bed of crushed rock or other coarse media roughly 2 metres 6 feet deep and up to 60 metres 200 feet in diameter. The cost to operate a trickling filter is very low. Tfs are designed as aerobic attached growth reactors and have been proven to be suitable for the removal of ammonia nitrogen. For an additional 9 years he was a principal advisor to.
Additional treatment may be needed for the effluent to meet strict discharge standards. These products include trickling filter biotower, nitrification, etc. Attached growth system free download as powerpoint presentation. The following is a set of lecture notes from the class, prepared by dr. Introduction to trickling filters and rbcs study guide. Classification of tfs based on organic loadings low rate or standard rate trickling filters.
Mar 24, 2014 what is a trickling filter trickling filter is a type of waste water treatment process, which is an attached growth process. Elena gogina at moscow state university of civil engineering. This type of system is typical of a number of technologies e. The sewage is sprinkled over the media which percolates through filter media and is collected through the underdrainage system. Aerobic conditions are maintained by splashing, diffusion, and either by forcedair. Conventional trickling filter or ordinary trickling. An introduction to trickling filter wastewater treatment plants.