16
Secondary sewage treatment is mainly a
Answer: Biological process
Answer: Lignin
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Answer: Saccharomyces
Answer: Streptokinase
Answer: Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
Answer: Saccharomyces cerevisiae
Answer: Rhizobium
Answer: Bio-insecticidal plants
Answer: Heterotrophic bacteria
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