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Nitrate Nitrate is a colorless, odorless, and tasteless compound that is present in groundwater. Nitrate can be expressed either as NO3(nitrate) or NO3-N (nitrate-nitrogen).Proper management of nitrogen sources such as fertilizers and manures can minimize contamination of drinking water. Goal

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Nitrate

Nitrate is a colorless, odorless, and tasteless compound that is present in groundwater. Nitrate can be expressed either as NO3(nitrate) or NO3-N (nitrate-nitrogen).Proper management of nitrogen sources such as fertilizers and manures can minimize contamination of drinking water.

Goal

High nitrate level in water especially drinking water causes serious health issues. Analyzing water quality and removal of nitrate using a natural treatment system in the form of denitrifying bioreactor is the goal of this research. Students are responsible for determining the environmental conditions required  in the desired system to ensure that nitrate is effectively removed by dominant species through biological reactions.

Denitrifying Bioreactor

In order to reach our goal, we should design a Denitrification Bioreactor.

Denitrification Bioreactors for agricultural drainage are one of the newest technologies being investigated for practical edge of filed nitrate-nitrogen (NO3-N) reduction.

Bioreactor is a container or engineered device in which a chemical process is carried out that supports a biologically active environment.

Denitrification generally proceeds through a step wise reduction of some combination of the following intermediate forms: NO3− → NO2− → NO + N2O → N2.

Efficient electron donors such as wood chips, charcoal, alfalfa, newspaper, and saw dust are carbon sources for removal of nitrate from contaminated water . The source of nitrate removal that we used in our design was charcoal.

Design and Materials

Tubing that fits the pump provided

Hot gun to seal tubing reactor connections

5mg/l contaminated water

Water bottles

Charcoal

Spectrophotometer and chemicals required to measure nitrate level

Charcoal consisting of carbon

Design , Method, and Materials

Results

Date Nitrate level

10/17/2013 0.335

10/24/2013 0.30

1/12/2013 0.42

Graph

Learning Objectives

Using sources of carbon in reducing nitrate level.

Design bioreactor using simple tools and materials to examine how charcoal as a source of carbon reduced high nitrate level.

Analyze how to interpret the data collected from bioreactor.

Evaluate the results of Nitrate.

Results and Graph

Conclusion

Protecting water especially drinking water from contamination is important for our health while in this process we treated contaminated water using charcoal as a source of carbon in our designed bioreactor in a biologically active environment to reduce the nitrate level from 5 mg/l contaminated water to 0.3.

Christianson, Laura,E.Design and Performance of denitrification bioreactor. 2011.Web. 15 Oct 2013.

“Nitrate Reduction and Denitrification.” Web. 20 Oct 2013.

Self ,J.R. and Waskom R.M. “Nitrates in Drinking Water.” 21November 2013. Web. 25 November 2013.

Andrea

andreahazyl@hotmail.com

Diego

G35KENSTYLEDG@gmail.com

Araz

Araz_khachikian@yahoo.com

Pasadena City College

Araz Khachikian, Andrea Nava, Diego Gutierrez

Denitrifying Bioreactor

  • References

Design

Contacts