System for removal of nitrate and chrome from water
OwnerPaul Charles Wegnerinventor
Life of this patent
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Abstract
A process to remove nitrates and chrome from water. The process includes the steps of passing incoming nitrate and chrome contaminated water through a nanofiltration membrane. Retentate liquid rejected from the nanofiltration membrane is pumped to effluent or returned to the nanofiltration membrane. Permeate from the nanofiltration membrane is sprayed through a well screen upper collector above an open atmospheric bed having strong base ion exchange resin. The permeate is pumped through the ion exchange resin and through a gravel layer beneath the resin. The strong base ion exchange resin is periodically regenerated.
Claims20
A process to remove nitrates and chrome from water, which process comprises:
- passing incoming nitrate and chrome contaminated water through a nanofiltration membrane;
- pumping retentate liquid rejected from the nanofiltration membrane to effluent or returning to the nanofiltration membrane;
- delivering permeate from said nanofiltration membrane through a well screen upper collector in an open atmospheric bed having a strong base ion exchange resin;
- extracting, with a pump, said permeate through said ion exchange resin, through a gravel layer beneath said resin in said open atmospheric bed and from said open atmospheric bed;
- and
- periodically regenerating said strong base ion exchange resin.
A process to remove nitrates and chrome from water, which process comprises:
- passing incoming nitrate and chrome contaminated water through a nanofiltration membrane;
- pumping retentate liquid rejected from said nanofiltration membrane to effluent or returning to the nanofiltration membrane;
- delivering permeate liquid from said nanofiltration membrane through a well screen upper collector in a first open atmospheric bed having a strong base ion exchange resin;
- extracting, with a pump, said permeate liquid from said strong base ion exchange resin bed and through a gravel layer beneath said resin in the first bed;
- passing said permeate liquid from said first bed to a well screen upper collector in a second open atmospheric bed having a strong base ion exchange resin;
- extracting, with a pump, said liquid from said second bed and through a gravel layer beneath said resin in said second bed;
- and
- periodically regenerating said ion exchange resin in the first and second beds.
Dependencies are inferred from the claim text.