Neeta Seetha

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The effects of short-term organic shock loads on the performance of a laboratory scale two-stage activated sludge (AS)-biofilm reactor working at 6 h HRT and treating medium strength domestic wastewater was studied by increasing the influent chemical oxygen demand (COD) to 2-4 times the normal values. Each shock load was applied for a period of 6 h, after(More)
Transport and deposition of nanoparticles in porous media is a multi-scale problem governed by several pore-scale processes, and hence, it is critical to link the processes at pore scale to the Darcy-scale behavior. In this study, using pore network modeling, we develop correlation equations for deposition rate coefficients for nanoparticle transport under(More)
Grid computing is an emerging computing paradigm that have a significant impact on the next generation information infrastructure. Computer networks and the Grid should be integrated together for supporting high-performance applications and a QoS-based network service broker is the key to this integration. In this paper, we propose a new approach for(More)
A mathematical model is developed to simulate the transport and deposition of virus-sized colloids in a cylindrical pore throat considering various processes such as advection, diffusion, colloid-collector surface interactions and hydrodynamic wall effects. The pore space is divided into three different regions, namely, bulk, diffusion and potential(More)
Wastewater treatment plants (WWTPs) are identified as potential emission sources of greenhouse gases (GHGs) and bioaerosols. This paper reviews and analyse the potential sources of GHGs and bioaerosols from different unit operations and processes of WWTPs. Aeration tanks of activated sludge process (ASP) are found to be the most important sources of GHGs as(More)
A mathematical model is developed to simulate the co-transport of viruses and colloids in unsaturated porous media under steady-state flow conditions. The virus attachment to the mobile and immobile colloids is described using a linear reversible kinetic model. Colloid transport is assumed to be decoupled from virus transport; that is, we assume that(More)
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