Process for bio-bleaching of kraft pulp using bacterial...

Chemistry: molecular biology and microbiology – Micro-organism – per se ; compositions thereof; proces of... – Bacteria or actinomycetales; media therefor

Reexamination Certificate

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C435S252400, C435S253300, C424S093300, C424S093100

Reexamination Certificate

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07736879

ABSTRACT:
The present invention relates to an environment friendly, safe, and efficient four-step method of bio-bleaching Kraft pulp using the following strains of bacteria: (a)Serratia marcescens, MTCC 5094, (b)Pseudomonas aeruginosa, MTCC 5095, (c)Providencia rettgeri, MTCC 5096, (d)Pseudomonas aeruginosa, MTCC 5098. The present invention also provides a microbial consortium comprising a synergistic mixture of ligninolytic bacterial isolatesSerratia marcescens, MTCC 5094,Pseudomonas aeruginosa, MTCC 5095, andPseudomonas aeruginosa, MTCC 5098, or comprising bacterial strainsProvidencia rettgeri, MTCC 5096,Serratia marcescens, MTCC 5094,Pseudomonas aeruginosa, MTCC 5095, andPseudomonas aeruginosa, MTCC 5098, and a process for preparing an inoculum of the bacterial isolateProvidencia rettgeri, MTCC 5096. Also provided is a process for the preparation of a consortium comprising the ligninolytic bacterial isolatesSerratia marcescens, MTCC 5094,Pseudomonas aeruginosa, MTCC 5095, andPseudomonas aeruginosa, MTCC 5098, as well as a process for the preparation of a pulp suspension for bio-bleaching.

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