Category Archives: Bioremediation

Anaerobic Digesters Unsustainable for Biomethane Production, UK

“Their supporters claim they are a cost-effective and environmentally-friendly way of producing gas to heat homes while curbing greenhouse gas emissions. According to the Anaerobic Digester and Bioresources Association (ADBA), the industry’s lobby group, they will lead to ‘stable energy prices, fewer carbon dioxide emissions, and a financial saving for homes and businesses across the country’.

But the reality is this supposedly green energy source comes at a heavy cost to taxpayers and to the environment it is supposed to protect. An investigation by this newspaper has revealed that: …” click here for news article

Arsenic Removal from Soils and Water using Bacteria

Shigeki Yamamura, Seigo Amachi. Microbiology of inorganic arsenic: From metabolism to bioremediation. Journal of Bioscience & Bioengineering. Jul2014, Vol. 118 Issue 1, p1-9

Arsenic (As) contamination of drinking water and soils poses a threat to a large number of people worldwide, especially in Southeast Asia. The predominant forms of As in soils and aquifers are inorganic arsenate [As(V)] and arsenite [As(III)], with the latter being more mobile and toxic. Thus, redox transformations of As are of great importance to predict its fate in the environment, as well as to achieve remediation of As-contaminated water and soils. Although As has been recognized as a toxic element, a wide variety of microorganisms, mainly bacteria, can use it as an electron donor for autotrophic growth or as an electron acceptor for anaerobic respiration. In addition, As detoxification systems in which As is oxidized to the less toxic form or reduced for subsequent excretion are distributed widely in microorganisms. This review describes current development of physiology, biochemistry, and genomics of arsenic-transforming bacteria. Potential application of such bacteria to removal of As from soils and water is also highlighted.

Click here for paper (Open Access).