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Role of protozoa in the bioremediation of industrial wastewater
(Elsevier B.V., 2025) Syla Shahid; Reeva Shahid; n. Anza; Rachana Singh; Navaneet Chaturvedi; Anand Vikram Singh; Ajay Kumar
Protozoa are underrated microorganisms in the field of bioremediation. Flagellates, ciliates, and amoebae exhibit unique contributions to these processes. Moreover, protozoa demonstrate potential in bioremediating specific contaminants, including copper, hydrocarbons, and potentially uranium in groundwater or waste water management. Their grazing activity on bacteria, nutrient excretion, and growth factor release accelerate carbon mineralization in the activated sludge. Although their indirect effects are less pronounced under low substrate conditions, protozoa are primary bacterivorous grazers, contributing to effluent clarification and reducing pathogenic bacteria. Protozoan bioremediation has the potential of becoming a valuable asset for environmental sustainability. This chapter briefly discuss the bioremediation process and the ability of the protozoans in the degradation of environmental contaminents. © 2025
Microbial bioremediation of heavy metal approaches and advancement
(Elsevier B.V., 2025) Priya Yadav; Jyotsna Bora; Arya Gupta; Guniyal Raina; Subhasha Nigam; Navaneet Chaturvedi; Ajay Kumar; Rahul Prasad Singh; Sandeep Kumar Singh; Hariom Verma
In the last few decades industrial revolution and rapid urbanization, uses of pesticides in the agriculture, as well as mining often lead to accumulation of heavy metals in the soil and water ecosystem. Although some of the heavy metals such as Zn, Co, Cu and Fe considered as essential trace elements required by the plants for the catalytic activity or as cofactors for the several enzymatic reactions. However the excess accumulation of the heavy metals in the environment such as soil or water ecosystem can lead to severe challenges to environments and human health. The accumulation of heavy metals in the human being can lead to the distruction of membrane integrity, DNA or inhibition of several proteins. Although to mitigate the challenges of heavy metals toxicity several traditional approaches have been followed, but the high cost, limited resources again appear as a challenge. In this context bioremediation or the microbial based bioremediation of the heavy metal gaining attention in the recent past. The paper has been compiled to briefly discuss the effect of heavy metal son the plant or human beings, the mechanism followed by the microbial species during the bioremediation of heavy metals and the application of microbial species in the bioremediation of heavy metals. © 2025

2025

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