Biological treatment method for water
AssigneeCornell Research Foundation, Inc.
InventorWilliam J. Jewell
Life of this patent
Estimating the term…
Abstract
A biological treatment method for water containing nitrogen and phosphorus is provided. Treatment is carried out by contacting the water with one or more substituted or unsubstituted hydrocarbon compounds each having from 1 to 6 carbon atoms in the presence of methanotrophs and/or aerobic heterotrophic bacteria under process conditions effective to reduce soluble nitrogen and soluble phosphorus levels in the water each to below about 1 mg/L.
Claims21
A method for the biological treatment of water containing nitrogen and phosphorus, comprising:
- providing water containing nitrogen and phosphorus, wherein said water has not been subjected to biological or chemical water treatment;
- and
- contacting said water with at least one substituted or unsubstituted hydrocarbon compound having from 1 to 6 carbon atoms in the presence of one or more species of microbial organisms selected from the group consisting of aerobic methanotrophs and aerobic heterotrophic bacteria under conditions effective to reduce soluble nitrogen levels in said water to below about 1 mg/L and soluble phosphorus levels to below about 1 mg/L.
A method for reducing nitrogen and phosphorus levels in wastewater, comprising:
- providing wastewater containing nitrogen and phosphorus, wherein said wastewater has not been subjected to biological or chemical water treatment;
- filtering solid particles having a particle size greater than about 10 .mu. from said wastewater
- contacting said treated wastewater with methane in the presence of aerobic methanotrophs, wherein said contacting is carried out in a suspension of said methanotrophs in said treated wastewater in an amount of from about 3 to about 5 g VSS/L under conditions effective to reduce soluble nitrogen and soluble phosphorus levels in said treated wastewater each to below about 0.1 mg/L;
- and
- producing nutritionally useful sludge.
Dependencies are inferred from the claim text.