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The article reports that Anaerobic digestion (AD) help in getting the green energy and the soil amendment as the material coming out of a digester referred to as digestate is as good for soils as compost or municipal biosolids. Topics include common in municipal wastewater treatment; and solids to meet regulatory requirements for pathogen destruction and volatile solids reduction.

The article focuses on biosolids treatment. It states that excessive amount of chemicals were added to treat sludge which include saw dust with sulphuric acid, turpentine and iron filings and phosphoric acid. It mentions that other technologies such as gasification, pyrolysis and wet air oxidation can be used and thermal hydrolysis, anaerobic digestion is used in sewage sludge treatment. It highlights that increase in population will change type of sewage sludge produced and treated.

The article reports on the expansion of the wastewater treatment plant of Akron, Ohio-based renewable energy producer KB BioEnergy with the addition of biosolids anaerobic digesters for food waste.

The author reflects on the magazine's industry data collection on U.S. composting operations including compost yard trimmings, compost food waste and other organics, and compost biosolids. Noted is the 150 Water Resource Recovery Facilities that codigesting high strength anaerobic digestion, tracked by the American Biogas Council, Environmental Protection Agency, and the Water Environment & Reuse Foundation. The magazine's BioCycle Portals is also discussed.

The article discusses the pilot program Bloom™ which provides with digestate for blending or landscaping of soil of utility company DC Water.

The article explains the benefits of thermal treatment of sewage sludge from water treatment plants. Research in Spain suggests that thermal pre-treatment of sludge can give benefits in the process efficiency and in treating waste sludge. Details of pilot-scale studies conducted for a combined thermal hydrolysis (TH)+anaerobic digestion (AD) process are discussed. It is noted that the energy input needed for the hydrolysis process in the TH+AD process is thermal energy, so the process is energetically self-sufficient.