This needs to be presented in an organized manner with all the segments in place. Samples will be taken in jars or beakers and varying dose of coagulant will be added simultaneously to all the jars. Determination of optimal coagulant dosage using jar test. Add a pint of spray water from the water source you will use to fill the tank to a clean, onequart glass jar. A simulated highway stormwater runoff was fonnulated and applied in scale model detention basin testing over a range of flow rates. The particles are too small to be removed by sedimentation process. This is a demonstration of an actual conventional jar test. Using report templates in pdf you can be guaranteed that you will miss out on anything that is very important. O in a granular form was used as coagulant, and it was applied in samples in liquid form, this is why its preparation was necessary at a concentration of 5000 mgl, in which 1ml applied on a sample of 500 ml represents a concentration of 10 mg l. In most cases the particles will not be balanced, and the soil will need to be altered by adding organic amendments. Jar test for determining coagulant dosage in water. Results and discussion a jar test for optimum coagulation.
They will separate into clay, silt, and sand layers. A blood test that assesses a persons iron stores in the body. In the field, we have to conduct silt test for every 20 cum of sand. Take a clean, straightsided jam jar and fill it about a third of the way up with the soil you are experimenting with. To purchase reprints of any bli publication, contact buyers laboratory 20 railroad avenue. Scribd is the worlds largest social reading and publishing site. A jar test procedure as described above can help to establish the optimum ph within the 7. Elico water quality analyzer pe 8 as per water quality guidelines and laboratory methods enforced by neeri. When a check on the sand is required, it is recommended that a sample of the sand be obtained prior to construction and the 8 hour jar test be conducted. Based on what we found in the experiments, with the. Square jars provide more turbulence than round jars. A lab report is nonetheless a detailed account of an experiment along with the results found.
One container will be used as a control while the other 5 containers can be adjusted depending on what conditions are being tested. A little extra time and thought to the set up of the lab. Colloidal particles are in size range between dissolved substance and suspended particles. Samples of water to be treated are placed in six jars. Expound on the information that is presented in this handout. Various amounts of chemicals are added to each jar, stirred, and the settling of solids is observed.
Describe the purpose of jar testing and summarize the theoretical background. Use the litmus paper to test as many items as you can. However, if you are designing a lab report without any help. Also have ready another jar of clean water and a stirring stick. Operate the stirrers at a high rpm for 1 minute to simulate the static mixer. The test can be repeated by holding the ph and varying the coagulant dose. Fill the jar testing apparatus containers with sample water.
Environmental engineering lab manual friday, january 29, 2016. Procedure for laboratory jar test the purpose of the laboratory jar test is to select and quantify a treatment program for removal of suspended solids or oil from raw water or a dilute process or waste stream. Jar testing national environmental services center west virginia. Sample soil test report and fertilizer recommendations name.
Silt content test for sand fine aggregate civilology. Coagulationflocculationjar test marmara universitesi. Pdf a jar test study on the use of alum and ferric chloride for. Start off with the jar a third filled with soil step two now add the clear water until the jar of soil is almost full. There are many different ways that one can proceed with the jar test depending mainly which are the main objectives, either to optimize time of settlingsedimentation, or compare the performance. Coagulation, flocculation and clarification of drinking water terry l. The lab should be set up to meet the flow requirements of the most routine test performed. A jar test study on the use of alum for turbidity and nutrient removal in canyon lake, ca final report submitted to mwh americas, inc. Noblet with research assistance by emmett campbell and graciela cervantes. Now add 1 ml, 2 ml, 4 ml, 8 ml, 10 ml, 12 ml of alum respectively in each one of the. Alum solution 1 ml containing 10 mg of alum procedure. Then reduce the speed of the tech brief jar testing, spring 2005, vol. Put the lid on the jar tightly and shake vigorously for approximately 2 minutes.
The purpose of the procedure is to estimate the minimum coagulant dose required to achieve certain water quality goals. Frequency of jar testing jar testing should be done seasonally temperature, monthly, weekly, daily, or whenever a chemical is being changed, or new pumps. Plot turbidity and ph as a function of coagulant dose. The jar test a laboratory procedure to determine the optimum ph and the optimum coagulant dose. The appropriate amount of 10,000 ppm alum stock was added to each sample, and flash mixed at. Tighten the lid and shake the jar for several minutes so that all the particles are in suspension. Find out silt content in sand fine aggregate apparatus required. We take you step by step through the process and describe the changes occurring. A scale model of a typical basin was consuucted to investigate contaminant removal capabilities of existing detention basins. Jar test is universally recognized as the most valuable and. Enhancing contaminant removal in stormwater detention. Interpretation of soil test reports for agriculture. The need for backtracking should be minimized, especially if more than one technician is working at a time.
Other benefits of conducting jar test include better finished water quality, longer filter runs, overall prolonged filter life, and lower chemical costs. For example, the most common test for polymer evaluations is the jar test. Determination of the optimal dosage of aluminum sulfate in. The ideal soil texture is a mix of sand, silt, and clay particles, known as a loam. Coagulation and flocculation causes a chemical reaction that promotes the formation, agglomeration or clumping of such particles to facilitate their removal from solution. Jar test procedure the jar test procedures involve the following steps.
Jar testing is a pilotscale test of the treatment chemicals used in a particular water plant. Standard practice for coagulationflocculation jar test of. Set your mason jar soil test aside for several hours, so the particles have a chance to settle. Xerox workcentre 7220 lab test report 20 buyers laboratory llc. The paddles can be rotated with varying speed with the help of a motor and regulator. This knowledge will provide a basis for understanding the needs of the. The jar test, device consists of a number of stirrers 4 to 6 provided with paddles. D3370 practices for sampling water from flowing process streams. Jar test reference april 2010 province of manitoba. For example, if nickel is the main metal of concern, adjust the final ph to 10 to fully optimize the effects of hydroxide precipitation. Results and discussion a jar test for optimum coagulation dose synthetic wastewater sample ph. To evaluate soil texture, use a simple jar test to determine the percentages of sand silt, and clay. Arcadia, ca for elsinore valley municipal water district 315 chaney st, lake elsinore, ca 92531 submitted by james a.
Prelab complete the prediction column in the data table indicated prior to lab. A jar test is performed by first adding the same alum dose and varying the ph in each jar. The university of minnesota soil test report contains five sections that with one exception we will go through in the same order as they appear in the report. Doc experiment 4 coagulation and flocculation lab report. Referenced documents purchase separately the documents listed below are referenced within the subject standard but are not provided as part of the standard astm standards. Engelhardt application development manager drinking water hach company photo by author the intent of this paper is to provide cursory information about coagulation, flocculation and clarification. Various test methods are available, as illustrated above, to screen polymers in the many types of applications and equipment found in water and wastewater treatment plants. The test is sometimes ordered with an iron test and a tibc total iron binding capacity to detect the presence and severity of iron deficiency or iron overload. Compaction of soil is the optimal moisture content at which a given soil type becomes most dense and achieve its maximum dry density by removal of air voids.
Duplication in any manner is illegal and strictly forbidden ithout ritten permission from bli. It consists of six 1liter beakers or 2liter square jars and a gang mixer. Laboratory analyses jar testing jar tests were performed on the collected samples using 1. Ene 806 project report 2 coagulation and flocculation.
Phippsbird jar testing apparatus is recommended for use. If needed, adjust the spray water ph to the range required by pesticide labels. As the 2minute rapid mix time comes to an end, observe which. Jar testing is normally carried out on several beakers at a time, with the results from the first test guiding the choice of parameter amounts in the later tests. Describe the experimental procedure summarize the procedure in the lab. Report format introduction describe the pur pose of jar testing and summariz e the theoretical background. First, we have to fill the measuring cylinder with 1% solution of salt and water up to 50 ml. Compaction test of soil is carried out using proctors test to understand compaction characteristics of different soils with change in moisture content. Proctor soil compaction test procedures, tools and results.
During this fast mix procedure, observe the jars very closely to determine which dosage yields the first floc or formation of particles. Jar tests determination of optimum ph the jar test a laboratory procedure to determine the optimum ph and the optimum coagulant dose a jar test simulates the coagulation and flocculation processes fill the jars with raw water sample 500 or ml usually 6 jars adjust ph of the jars while mixing using h 2 so 4 or naohlime. You need to expand on the information that is already presented in this handout please read the textbook. Ce 326 princip les of environmental engi neering jar test. The purpose of the laboratory jar test is to select and quantify a treatment program for removal of suspended solids or oil from raw water or a dilute process or.
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