Archive | Environmental Microbiology

Mechanism of Heavy Metal Re­sistance | Microbiology

There are four main physiological mechanism of heavy metal resistance: (a) Inactivation, (b) Impermeability, (c) By- pass, and (d) Altered target site(s). On the other hand, earlier studies reported that fungi tend to survive heavy metal stress either by adaptation or mutation. Not only fungi but few algae such as Stigeoclonium tenue can grow in a zinc-rich effluent and showed [...]

By |2016-12-12T07:36:01+00:00December 12, 2016|Environmental Microbiology|Comments Off on Mechanism of Heavy Metal Re­sistance | Microbiology

Factors Affecting Methane Production | Microbiology

Following are the factors affecting methane production: 1. Slurry: Proper solubilisation of organic materials (the ratio between solid and water) should be 1:1 when it is house hold type. 2. Seeding: In the beginning, seeding of slurry with small amount of sludge of another digester activates methane evolution. Sludge contains acetogenic and methanogenic bacteria. 3. pH: For the production of [...]

By |2016-12-12T07:36:01+00:00December 12, 2016|Environmental Microbiology|Comments Off on Factors Affecting Methane Production | Microbiology

3 Stages of Anaerobic Digestion | Microbiology

Anaerobic digestion is accomplished in three stages, solubilisation, acidogenesis and methanogenesis. Stage # 1. Solubilisation: It is the initial stage when feed stock is solubilized by water and enzyme. The feed stock is dissolved in water to make slurry. The complex polymers are hydrolysed into organic acids alcohols by hydrolytic fermentative methanogenic bacteria which are mostly anaerobes (Fig. 33.3A). Stage [...]

By |2016-12-12T07:36:01+00:00December 12, 2016|Anaerobic Digestion|Comments Off on 3 Stages of Anaerobic Digestion | Microbiology
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