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1. Use of Microbial Culture for Sewage / Effluent Treatment

Dear Mrinalini

It is wrong to say that Microbial culture available are necessarily genetically modified. They are natural soil borne microorganisms. The basic advantage in using these are to ensure that that population of microorganisms (which are much more effective than intrinsic ones) dominate the effluent, resulting far better bio degradation.

Such microorganisms that are provided in aqueous base are much more effective and faster than those which are cereal based. The population of the microbes exceeds 1 billion 'colony forming units' per liter. Tests have shown that in the presence of the cultured microorganisms the intrinsic bacteria tend to be non functional.

Moreover, the usual method to judge the population of microorganisms is to measure MLSS (which is to an extent faulty as it indicates microorganisms - dead or alive and organic suspended solids) or a slightly more accurate method of using MLVSS (which indicates a more accurate count but still consist of dead and alive microorganisms). The use of cultured microorganisms over come this issue.

Biotech Services in Noida can provide these cultures. Log on to for more information.


Keshav Agarwal


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