Investigation of Heavy Metal Effects on the Anaerobic Co-Digestion Process of Waste Activated Sludge and Septic Tank Sludge

Figure 1

(a) The biogas reactor. 1: 1 L glass bottle; 2: connection hose; 3: gas volume; 4: length scale; 5: valve; 6: saturated brine tank; 7: tray. (b) Photograph of the biogas reactor.

(a)

(b)