Slurry injections

Control of NH3 loss during grassland production presents many problems. The most readily manipulated loss is that arising from land application of slurry. Injection effectively eliminates NH3 loss, as discussed above, and is sometimes reflected in increased efficiency of utilisation of the N applied (29). On grass/arable farms, application of slurry prior to ploughing or cultivation also increases N recovery by the following crop. However, the speed with which NH3 loss can occur requires that cultivation takes place almost immediately after application (29). 

Figure 1 Volumes of slurry injected at different depths by winged and simple injection tines.

Figure 4. Effect of air temperature on the N efficiency of slurry injected (-)...

Slurry injection (0 h inc.) Slurry trailing hose (6 h inc) Solid broad spread (6 and 12 h inc.)... 

Viscoaugmentation of the vocal cord, the repair of injured or scarred vocal cords, and treatment of glottal insufficiency are additional uses of HA derivatives. Hyaln B slurries injected into vocal cords produce no inflammatory reactions, and the material continues to be present even after one year [153]. 

Stabilization materials can also be placed as dry powders. Originally, lime was used in cohesive deposits, based on its successful use for surface stabilization. Recent research has indicated, however, that better results are obtained over a wide range of soils with a cement/lime mixture, with the lime in the range of 20 to 25% of the mixture. Dry powders are placed by air pressure, through special auger tips considerably smaller than those used for slurry injection. Dry placement has obvious advantages in the Scandinavian... 

Lime slurry and lime-flyash slurry injected to shallow depths under pressure... 

Future investigations at PETC will focus on improving sorbent utilization while burning high-sulfur coals. A spray dryer system has been added to the test facility, and a sorbent recycle system will be installed. The planned work will include an evaluation of the effectiveness of lime and limestone slurry injection. 

Liquid and slurry injections are commonly employed for the addition of various ENA components to ground water such as microorganisms, nutrients or dissolved co-substrates. Injections of H2O2 or metal peroxides have also been used for increasing the oxygen supply within the framework of ENA. 

The techniques for liquid and slurry injections are comparable to the microbial injections. 

We next describe a slurry injection system (SIS), developed by Araca Incorporated (Borucki et al., 2012, 2014a,b,c), that for silica slurries and conventional pads can make it possible to achieve significant reductions in flow rate, sometimes by as much as 50%, while meeting all of the other slurry reduction goals listed above. The device works for many slurry and pad combinations, particularly for silica slurries and pads with pore stracture. 

Figure 15.4 Araca slurry injection system (SIS) for the applied materials Mirra .

While CWS fuels address one of the mine safety and environmental issues, they also can be used to address airborne emissions from coal-fired boilers. Specifically cofiring CWS in coal-fired boilers can be used as a significant method for trimming NO emissions and reducing the costs associated with NO, control. The extent to which CWS improves NOx emissions can be a function of the base fuel and base combustion conditions, the slurry formulation, and the approach to slurry injection. The experimentation at Seward Generating Station Boiler 15, in particular, demonstrates the environn ntal potential of this family of opportunity fuels. 

Parameter Unit Standard design (slurry injection) Pitt 8 SAf Advanced design (slurry drying) Pitt 8 SAf ... 

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