Pritha Chatterjee

Pritha Chatterjee |Clyto Access

Indian Institute of Technology, India.


Expertise: Waste Recycling, Environmental Management


Pritha Chatterjee currently pursuing her PhD in Environmental Engineering at Indian Institute of Technology. She has an 4 years of reaseatrch expertise on Development of low cost sustainable treatment method for sewage removing organic matter, nutrients, suspended solids and pathogens to facilitate reuse.She has Studies on granulation, start-up, and performance improvement of Up flow Anaerobic Sludge Blanket Reactor. Pritha Chatterjee asssisted nearly 6 consultancy projects. She has 13 journal publications and 6 confernce publications.



Title: Biomass granulation in an up flow anaerobic sludge blanket reactor treating sewage followed by treatment in a high rate algal pond facilitating reuse of treated water.


A pilot-scale up flow anaerobic sludge blanket-moving bed biofilm (UASB-MBB) reactor followed by a high rate algal pond (HRAP), of capacity 500 m3 /day, was designed and operated to remove organic matter, nutrients and pathogens from sewage and to facilitate reuse. For an influent COD concentration of 233 ± 20 mg/L, the final effluent COD was 50 ± 6 mg/L. Successful biomass granulation of 63% was observed in the sludge bed of the UASB reactor after five months of operation, which is breakthrough in full scale UASB reactors and has never been reported earlier in literature for UASB reactors treating such low strength sewage. Ammonia removal in HRAP was 85.1 ± 2.4% with average influent and effluent ammonia nitrogen concentrations of 20 ± 3 mg/L and 3 ± 1 mg/L, respectively. Phosphate removal after treatment in the HRAP was 91 ± 1%. There was a 2 - 3 log scale pathogen removal after treatment in HRAP with MPN of the final effluent being 600 – 800 per 100 ml, which is within acceptable standards for surface irrigation. The black water after treatment in UASB-MBBR-HRAP is being reused for gardening and landscaping. This proper hydro dynamically designed UASB reactor demonstrated successful granulation and moving bed media improved sludge retention inUASB reactor. This combination of UASB-MBB reactor followed by HRAP demonstrated successful sewage treatment for a year covering all seasons.


Related Conferences :

World Summit on Recycling and Environmental Management