Figure 1.
COD removal efficiency of R1 (◦) and R2 (■); and biogas methane concentrations of R1 (△) and R2 (♦) over each of the five periods (P1–P5).
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.