Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Acetate concentration in activated sludge in the presence (circles) or absence (triangles) of sodium nitrate over 3 h. Closed symbols show the acetate concentration in samples pulsed with [12C]acetate, while the open symbols show the acetate concentration in the treatments with [13C]acetate. Arrows show the six time points at which the labeled pulses were added. The data were gathered from a single reactor per treatment.
