Feasibility study technical conditions

Use of an HR system always requires a detailed technical and cost feasibility study. The starting point, however, is a set of general technical information on the structural principles of HR moulds, and their advantages and limitations - especially where conditions of use are concerned. The use of HR must arise out of rational needs, and must not be, for example, a manifestation of a designer s ambition, or a symbolic exercise in modern manufacturing methods. 

An important activity during the project initiation phase is to analyse the project feasibility. This study assesses the viability of the (total) project and must support the decision to go ahead with the project or not. Although not really within the scope of this Manual, the feasibility study is briefly discussed in this section because the physical and environmental conditions at the envisaged borrow area and reclamation site, the equipment proposed for executing the reclamation works and the design (including technical specifications) may affect the outcome of this study. 

Our main motivation to develop the specific transient technique of wavefront analysis, presented in detail in (21, 22, 5), was to make feasible the direct separation and direct measurements of individual relaxation steps. As we will show this objective is feasible, because the elements of this technique correspond to integral (therefore amplified) effects of the initial rate, the initial acceleration and the differential accumulative effect. Unfortunately the implication of the space coordinate makes the general mathematical analysis of the transient responses cumbersome, particularly if one has to take into account the axial dispersion effects. But we will show that the mathematical analysis of the fastest wavefront which only will be considered here, is straight forward, because it is limited to ordinary differential equations dispersion effects are important only for large residence times of wavefronts in the system, i.e. for slow waves. We naturally recognize that this technique requires an additional experimental and theoretical effort, but we believe that it is an effective technique for the study of catalysis under technical operating conditions, where the micro- as well as the macrorelaxations above mentioned are equally important. 

Fermentation methods were studied extensively at Rutgers University by Nickerson and coworkers and by Elmer in the 1970s on ground scrap tires. Their work was aimed at producing commercially valuable products via the fermentation process from scrap tires. This work led to many important findings and showed that although technically feasible, this was not a solution to get rid of scrap tires. Even under ideal conditions only minor reduction of the rubber occurred. 

The WRHA obtained under these conditions has a good quality and may be used as adsorbent, filler of polymers, rubbers, cement, and concrete, or for other purposes. In conclusion, it may be stated that as the high ash content, low bulk density, poor flow characteristic, and low ash melting point makes the other conventional types of reactors unsuitable for rice husks utilization, fluidized bed reactors seem to be a suitable choice. The study of published reports indicates that it is technically feasible to successfully bum the rice husk in a fluidized bed reactor, and combustion intensity of about 530 kg h m can be achieved. 

The recovery of direct dye by adsorption on cross-linked fiber was developed and appeared technically feasible. The concentration of amino group fixed in the adsorbent phase was 3.30 mol/kg dry fibers. Atypical direct dye, brilliant yellow was used. The breakthrough cmves for adsorption of the dye were measured for different flow rates, bed heights, influent concentration of the dye, and temperature (Hiroyuki et al., 1997). Chitosan fibers have been studied for the recovery of dyes and amino acids (Yoshido, 1993) but less attention has been paid to the use of this conditioning of the polymer for the recovery of metal ions. 

If design studies show that ground improvement does finally not result in the required fill mass behaviour, then the (technical) feasibility of the project may depend on the possibility to re-design the foundations of the superstructures. The input for such a design should then be based on the existing and/or improved soil conditions. 

---