Biogas Capture from Wastewaters: The High-Rate Anaerobic Digesters

Starting with the introduction of anaerobic filter in 1967, a string of breakthroughs in anaerobic reactor design occurred during the late 1960s and early 1970s. These breakthroughs made it possible to extend the reach of anaerobic digestion from highly concentrated (in volatile organics content) manure slurry or sewage-sludge to much less concentrated industrial wastewaters. Later the reach was further extended to dilute wastewaters like domestic sewage and wash-waters.