introduction bio gas and water purification significant in disasters significant in third world...
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Water PurificationWilliam Petterson & Wyatt McClure
Introduction
Bio gas and water purification
Significant in disasters
Significant in third world countries
Energy efficient
Burns clean
Introduction
Inexpensive and portable
Provides more water to a growing population
Reduces disease prominence
Decreases the number of deaths due to dehydration
Significance
People need access to clean water in the world that is safe for drinking.
About one out of five people in third world countries have access to clean water.
Water born diseases account for 10,000 to 15,000 deaths per year.
Significance
Prevention of waterborne diseases like diarrheal infections such as cholera and other diseases like arsenic poisoning.
http://popularlogistics.com/2007/12/cholera-in-iraq/
http://sneezl.com/anti-gaia-arsenic-poisoning-vs-lust-for-gold/
Review of Literature:Distillation
To distill water you heat the solution to the temperature at which water boils.
When the water boils any pollutants in the water separates from the vapor.
The condensing water that is collected in the separate vat is then pure and ready to drink.
Dialysis fluid purity “Water purification” (July 2002)
Review of Literature:Filtration
Rids the water of particulates and some organisms.
Forces water through a porous material that varies in size.
The smaller pores capture smaller particles or organisms.
Filter commonly found on or in taps.
The porous material must be replaced regularly.
Dialysis fluid purity “Water purification” (July 2002)
Review of Literature:Bio Gas
Generated from decaying organic material.
Bacteria produce hydrocarbons (natural gas) when separated from oxygen.
Produces 600 BTU of energy per cubic foot.
Habmigern 2003
Review of Literature:Methane
Tetrahedral structure
CH4
75% of natural gas and 55-60% of biogas
Odorless, colorless, and non-toxic
Explosive when in 5-15% concentration
Commonly found in reservoirs underground
Animals produce 15% of the worlds methane
Shahashiri 2008
http://mrbarlow.wordpress.com/2009/01/17/
Hypothesis
It was hypothesized that the pH of the clean water will be closer to 7 than the dirty water, that the ratio of dirty water to clean water will be about 8:7, that the contents of the clean water will contain close to 0ppm of chemicals and pollutants, and that it will take 1.5 hours of burning biogas to distill 2 gallons of dirty water completely.
Process of distillation purifies in this way as an industrialized design using more accessible materials on smaller scale.
How hot methane- most of biogas, burns: 333˚C; compared to boiling point of water: 100˚C
Procedure
Assembly
We set up the wooden stand with the burner on it using duct tape.
We drilled 1” diameter holes in the tops of cooler and 6 gallon bucket.
We attached the PVC piping to each of the holes and set the 6 gallon bucket on top of the burner stand
The blueprints for the assembly.
Procedure
We connected the tubing from the biogas to the burner.
There was not enough biogas, so we augmented it with propane.
The blueprints for the assembly.
Procedure
Testing
We put two gallons of water per test in the dirty water bucket from the tap.
To dirty it we added 4 cups of either Drano OR lemon juice as well as 1 cup of dirt.
We then tested the pH, nitrate content, phosphate content and alkalinity of the dirty water and recorded the results.
We turned on the burner after the purifier is set up.
We set a timer and let the water completely boil off.
Procedure
We had to check frequently to tell when the water was all gone, and recorded the amount of time when the water had completely boiled off.
We tested the pH, nitrate content, phosphate content and alkalinity of the clean water as well as the amount of soil content and recorded them.
Results
The design was flawed
Materials were not durable
Water tight sealants were not heat resistant
The sealants melted and became compromised
pH Phosphate concentration Nitrate concentration Alkalinity
Trial 1 Dirty Water 3 5ppm 0ppm 0
Results
Device produced some clean water
Design proved capable (industrialized design)
Proved to be efficient with the flame based fuel
Materials were cost effective including building
Discussion
Over all the design was solid, but not the materials
Make sure fuel supply is sufficient enough for use
Replace PVC with copper piping
Replace caulking with solder
DO NOT USE DUCT TAPE.
Discussion
Research can not be considered a failure
Proved that easily accessible materials could work
Proved that the design of the purifier was economical
Provided information on what materials are suited for the necessary conditions
Conclusion
Experiment was designed to test efficiency of a water distiller fueled by biogas.
Results inconclusive, as almost no data was collected because the trials were aborted based on material failure and danger.
The idea would help many when put with a biogas digester, as it would provide clean, pure water.
Unfortunately the purifier was not made of strong enough materials to hold up to the heat produced from the burner.
Conclusion
It is concluded that stronger materials should be used to create the purifier.
The cost would go up, however, decreasing the ease of installing it.
A water distiller powered by combustion of hydrocarbons is not a practical way to produce pure water.
Acknowledgements
Nicholas True, Mentor
Noble Energy, The Adolph Coors Foundation; sponsors
The FSI staff and program
UNC, hosts of the FSI program
UNC’s geosciences laboratory for lending us some propane
All sponsors of the FSI program
Parents, for encouraging us to go here
Reference Schultz, C. C. (2004). Water purification. PM Engineer, 10(11), 47-47-48,51,62. Retrieved from
http://search.proquest.com/docview/203663591?accountid=12832
Biogas production. (n.d.). Retrieved June 22, 2011, from http://www.habmigern2003.info/biogas/methane-digester.html
Shakhashiri, B, & Schreiner, R. (2008). Methane. Access science. Retrieved June 21, 2011, from http://www.accessscience.com/content.aspx?id=421200&aid=2888
Zhao, K, Cui, D, Xu, T, Zhou, Q, & Hui, S. (2008). Effects of hydrogen addition on methane combustion. Fuel processing Technology, 89(11), Retrieved from http://www.sciencedirect.com.source.unco.edu
Sampathkumar, K, Arjunan, T, Pitchandi, P, & Senthilkumar, P. (2010). Active solar distillation- a detailed review. Renewable and Sustainable Energy Reviews, 14(6), Retrieved from http://www.sciencedirect.com.source.unco.edu
anthony, J. (2007). Drinking water for the third world. Journal of the American Planning Association, 73(2), Retrieved from http://www.tandfonline.com/doi/pdf/10.1080/01944360708976155
Plate, D, Strassman, B, & Wilson, M. (2004). Water sources are associated with childhood diarrhoea. Tropical Medicine and International Health, 9(3), Retrieved from http://onlinelibrary.wiley.com.source.unco.edu
http://popularlogistics.com/2007/12/cholera-in-iraq/
Appendix: Water purification methods. (2002, July). Dialysis fluid purity, 17(doi: 10.1093/ndt/17.suppl_7.54 ), 54-61.
http://sneezl.com/anti-gaia-arsenic-poisoning-vs-lust-for-gold/
http://mrbarlow.wordpress.com/2009/01/17/