This paper describes a GC/MS system capable of performing Volatile Organic Analysis on liquids, solids, and air. When combined with a syringe auto-injector, the system is completely automated for both volatile and semi-volatile analyses. An OI Analytical Model 4551 Vial Multisampler and an OI Analytical DPM-16 Multisampler are interfaced and then connected to an OI Analytical Model 4560 Sample ...

Liquid livestock waste can be managed by separating liquid and solid fractions then treating each separately by applying best available technology, such as anaerobic digestion for the solid fraction. There is an increasing use of polyacrylamide (PAM) as a flocculant agent to improve solid-liquid separation. In the present work, the anaerobic toxicity of PAM residues and the optimal range of tot...

background wastewaters with high salt content disturb the metabolic function of microorganisms causing plasmolysis or activity loss in microorganisms, so the efficiency of biological treatment of saline wastewater by conventional microorganisms will decrease. objectives this study aimed to find the outbreak of disorder in the biological wastewater treatment process and how much salt leads to lo...

This paper proposes a new non-volatile semiconductor memory which features a suspended gate integrated with silicon nanocrystals dots as a floating gate and the MOSFET as a readout. Performing three-dimensional finite element simulations combined with an analytical plate-capacitor model, we clarify the pull-in/pull-out operation of the suspended gate. We also show the dependence of the hysteres...

In this paper mathematical models of the composting process are examined and their performance evaluated. Mathematical models of the composting process have been derived from both energy and mass balance considerations, with solutions typically derived in time, and in some cases, spatially. Both lumped and distributed parameter models have been reported, with lumped parameter models presently p...

In this paper the thrust was on assessing changes occurring during the decomposition of human feces through estimation of changes in some typical characteristic parameters (pH, Electrical conductivity, volatile solids, moisture content, carbon content, nitrogen content, C:N ratio and oxygen uptake rate). For these purpose experiments were performed in plastic reactors at controlled temperature ...

In this study, the co-digestion of cassava pulp (CP) and pig manure (PM) in a two-phase continuously stirred tank reactor (CSTR) was examined to find the optimum CP-to-PM mixture ratio (w/w volatile solids; VS) and to evaluate the effect of phase separation on the efficiencies of solid destruction and methane production. The results showed that the highest VS removal (29%) and the greatest prod...

Poultry slaughterhouse wastewater contains high concentrations of chemical oxygen demand (COD), total suspended solids (TSSs), fats, oil and grease (FOG), proteins carbohydrates. It is important that the treated to acceptable environmental discharge standards. In this study, poultry (PSW) was using two-stage processes consisting a biological pre-treatment biodegrading agent (Eco-flushTM) couple...

Sewage sludge is a useful raw material for the production of renewable energy due to its stable annual output. In this study, enhancement mesophilic anaerobic digestion sewage through heat pretreatment at 95 °C 30 min was tested in an moving bed biofilm reactor (hAMBBR). The retention time set 20, 15, 10, and 5 days during 300 operation compared traditional continuous stirred tank (AnCSTR) with...