Flushing rate

Selectivity is a relative term that means a desorbent must have balanced strength or selectivity for the adsorbent relative to the desired feed normal paraffins. A desorbent that is more strongly held by the adsorbent than the feed normal paraffins will be difficult for the desired feed normal paraffins to displace from the adsorbent This results in poor adsorbent utihzation due to a loss in selective volume. At the same time, a desorbent carmot be too weakly attracted to the selective volume (relative to the feed normal paraffins) or excessive desorbent circulation is needed to displace the feed component from the adsorbent. In this situation, excessively high desorbent rates are needed to recover feed normal paraffins from the adsorbent These high desorbent flush rates result in non-economical process conditions due to excessively high utility consumption in post-Sorbex product fractionation. 

In a linear well-mixed reactor model the flushing rate is kv = 0.5 h-1, the total reaction rate constant of a specific chemical, ot =1.5 h-1. What is the retention factor of the reactor for the considered chemical, that is, what percentage of the chemical is reacting in the reactor How does this percentage change when the input of the chemical is doubled ... 

Note that % is the inverse of the mean flushing rate constant kw li defined according to Eq. 12-50. Yet, the upper limit of th is hypothetical, since lakes like Greifensee are usually completely mixed during the winter. 

To do so we observe that typical temporal variations of quantities like air temperature, wind speed, flushing rate, but also of man-made parameters like the input of some anthropogenic organic compound into the environment, can be described by just two distinct types of variability (1) by long-term trends, and (2) by period fluctuations. In the following the subscript i is omitted for brevity. 

Note that if the flushing rate in the water compartment is not zero (kqV > 0), C is smaller than C . Furthermore, the concentration ratio at steady-state, C / C , is larger than the chemical equilibrium (which is Km/V1). An application of that model is given in Problem 21.6. 

Flush out the lower half of the cell with CO2, using a flushing rate of at least 10 to 15 bubbles per second through the bubbler. Make sure the center partition is closed before flushing. Pass at least six volumes of gas through to be sure of complete replacement. 

Improving the efficiency of metals removal using wetlands has proved to be difficult. Detailed assessments of long-term performance of wetland systems with a focus on metal-retention mechanisms, eutrophication, and flushing rates, and their effects on downgradient ecosystems are required if wetland treatment is to be applied in temperate regions. 

Lake Erie Point (wastewater) and nonpoint (agriculture) source stresses. Multiple basins illustrate effects of morphometry, stratification, and flushing rates on trophic status. Mitigated via legislated wastewater and laundry detergent nutrient targets. Partially recovered—depends on future nonpoint-source mitigation. 

Daphnia appeared after the decline of inedible cyanobacteria (Oscillatoria spp.), and thrived due to a sustained 10% decrease in its voracious predator Neomysis mercedis in 1965. The decrease in Neomysis occurred at about the same time as the introduction of longfin smelt, a predator known to specialize in eating Neomysis (Edmondson, 1994). Helped by a rapid flushing rate (2.3 yr) and stable dissolved phosphorus inputs since the end of sewage diversion (Edmondson, 1994), Lake Washington remains mesotrophic. 

The stabilisation of the temperature during machining by appropriate flushing of the electrolyte is possible. However, too high flushing rates can destabilise the discharge activity. 

A complete analysis of the properties of these equations is quite difficult since the coefficients of P and Z are time variables and also functions of P and Z. However, the behavior of the solution becomes more accessible if the variation of these coefficients is studied as a function of time. The expressions GP — (DP + Q/V) and Gz — (Dz + Q/V) can be considered the net growth rates for phytoplankton and zooplankton. The advective or flushing rate, Q/V, is included in these expressions since it acts as a death rate in one segment system. 

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