Here is a method described that works for nitrogen

with biofilms (special bacteria on surfaces):

http://phys.org/news/2012-03-methods-purification-wastewater.html

Other:

http://phys.org/news/2013-05-phosphorus-recovery-wastewater-viable.html

http://phys.org/news/2012-08-msu-prof-method-phosphorous-wastewater.html

http://phys.org/news/2012-11-simple-precipitate-phosphorus-wastewater-pulp.html

http://www.eurekalert.org/pub_releases/2008-05/giot-ddt050208.php

http://www.popsci.com/science/article/2010-08/cotton-filter-soaked-nanotech-cheaply-and-quickly-purifies-large-volumes-water

http://www.eurekalert.org/pub_releases/2012-01/acs-ts011812.php

http://www.pnas.org/content/early/2013/05/03/1220222110

Regards,

Joachim

Thanks sir

this will solve my purpose

I support Bio treatment like this Algae methods, take a look:

http://www.algaeenterprises.com/wastewater-treatment

http://www.sciencedirect.com/science/article/pii/S1319562X12000332