Biodegradation, Aerated sewage sludge, Bacteria - metabolism, Carbon - chemistry, Carbon dioxide, Fungi, Geologic Sediments - microbiology, Nanotubes, New Bedford Harbor sediments, Sewage - microbiology, Single‐walled carbon nanotubes, Sludge, Trametes - metabolism, Waste Water - microbiology, Water Purification - methods, Water treatment plants