A comprehensive mechanistic model for simulating algal-bacterial growth dynamics in photobioreactors.

A comprehensive mechanistic model with state of the art understanding and assumptions is presented to simulate major processes in a photobioreactor for describing the algal-bacterial growth dynamics. The model includes a total of 37 state variables that broadly cover all the essential physiological and physico-chemical processes in such a system. Model parameters are first calibrated with batch experimental data, and thereafter, extensive validation of the model is carried with long term independent experimental data in diverse conditions.

Remediation of nitrate-contaminated water by solid-phase denitrification process-a review.

The paper presents a compilation of various autotrophic and heterotrophic ways of solid-phase denitrification. It covers a complete understanding of various pathways followed during denitrification process. The paper gives a brief review on various governing factors on which the process depends.

Nutrient removal using algal-bacterial mixed culture.

Simultaneous nitrate (N), phosphate (P), and COD removal was investigated in photobioreactors containing both algae and bacteria. The reactors were operated in the semi-batch mode with a hydraulic retention time of 2 days. Reactors were operated in two phases, (1) with 33 % biomass recycle and (2) with no biomass recycle.

Personal exposure measurement of students to various microenvironments inside and outside the college campus.

This study characterizes the exposure of a typical Indian Institute of Technology Kanpur student to particulate matter and gaseous co-pollutants like carbon monoxide, volatile organic compounds, and nitrogen dioxide in various microenvironments, within and outside the college campus. Chemical analysis of filter, used for the particulate matter measurement, was also carried out to determine the concentration of various elements such as Ca, Cd, Cr, Cu, Fe, Mg, Pb, Zn, and anions like F(-), Cl(-), NO3 (-), and SO4 (2-). Furthermore, time activity diary along with temperature data was maintained for the precise evaluation and analysis of results for various microenvironments.

Evaluation of a newly developed diffusion denuder for atmospheric aerosol separation from co-pollutant gases.

This paper presents the design, development and performance evaluation of a non-selective membrane based single annular tube diffusion denuder employed to separate co-pollutant gases from the aerosol of interest. The experiments were carried out on a single annular tube diffusion denuder and the gas removal efficiencies were experimentally determined using a laboratory scale setup as well as under ambient conditions. Using a simple combustion source, the removal efficiency of carbon monoxide was calculated for different main flow (MF) and flush flow (FF) combinations and was found to be in the range of 94-100%.