Microbes – the Spades of Industrial Wastewater Treatment
“It is the Microbes who will have the last laugh”. Louis Pasteur had this vision way back in the 1850s, 80 years before the Spanish flu epidemic and these words have stood true in each and every pandemic since then, including the current pandemic. It is currently an undeniable fact that it is the Microbes that are having the last laugh as they are the ones who are a major Cause and Cure in this pandemic too. The word ‘microbe’ itself is very paradoxical in nature since Antonie van Leeuwenhoek first discovered them in the 1670s. While Louis Pasteur blamed them for food spoilage with the introduction of ‘pasteurisation’, to the 1870s when Robert Koch busted them for causing diseases such as tuberculosis, Cholera, Anthrax etc. While various discoveries have occurred around the world, our own country ‘India’ should not be forgotten, where discussion about microbe’s dates back to the 6th century BC, where they are mentioned in Jain scriptures by Lord Mahavira himself calling them ‘Nigodas’, to our current situation where Indians rely heavily on microbes for food too, from our yogurts to cottage cheese to pickles and whatnot. But the great irony lies with the fact that these same microbes still require much greater attention, especially in Industrial wastewater treatment. India is one of the top industrial wastewater producers, still requires a large-scale up gradation in technology. Industrial Waste Water Treatment Current Scenario (Global): Industrial Wastewater is now being recognized as a potential resource for economic and social benefits. A growing movement to reduce wastewater and treat the wastewater before discharge has been brought about by environmental and societal pressures. A wastewater study estimates that a 49.0m3/yr per capita of wastewater is produced annually with industrial wastewater treatment estimated at around 188.1×10m3/yr. Estimated wastewater that is discharged into the environment is 171.3×109 m3 /yr with it flowing directly into the environment without any previous treatment. Collection rates of wastewater are estimated at 63%. 52% of this collected wastewater is treated, out of which 84% undergoes industrial wastewater treatment. The highest collection rates of 88% and treatment rates of 86% are found in Western Europe with the lowest collection and treatment rates of 31% and 16% respectively found in South Asia. Rates of collection of industrial wastewater treatment have been seen to reduce with the income level of an area from high, upper level, upper-middle, lower-middle and to low-income level classifications. Industrial Wastewater Treatment Current Scenario (India): Currently, India’s capacity to treat its industrial wastewater is at 37% with approximately 22,963 million litres per day (MLD). India also faces a requirement to treat a daily sewage generation of approximately 61,754 MLD according to the 2015 report of the Central Pollution Control Board. The cost of setting up Industrial wastewater treatment plants and restructuring the sewerage systems has been identified as one of the major challenges faced in India. The Centre for Science and Environment estimates setting up and building costs for an industrial wastewater treatment plant at Rs. 1 crore/million litres of wastewater. Apart from these one of the biggest issues is the current mentality and lack of awareness and stringent measures of strictness from the government. Although CPCB and NGT are now on their toes and have become much more intolerant when it comes to water quality, the biggest slack is in the awareness of the proper treatment process for a particular type of industry. Though there is a significant increase in the investment for industrial wastewater treatment and a huge number of increases in companies providing such solutions but still industry-specific and problem-oriented solutions are way too far to reach. When we focus on industries with an effluent substrate where biological processes should control the majority of the treatment part, people are still beating around the bush due to lack of proper guidance, unawareness, orthodox thinking like all microbes are pathogens only, and reluctance. For proper hardware to work a strong software is needed, and for industrial wastewater treatment, the ETP/STP plants are the hardware and the microbes are the software. Microbes have always been underrated in terms of wastewater, but they are spades in it cause right from saving your money in expensive machinery to maintaining the health of your system, along with giving you smooth operations for ETP they give you everything.
