Gaseous effluents, treatment

Gaseous effluent treatment issues still to be addressed include these ... 

R. Von Ammon et al KFK, Fed. Republic of Germany. Catalytic Oj and NO removal A process step for an off-gas cleaning system in reprocessing plants. Commission of the European Communities, Gaseous Effluent Treatment in Nuclear Installations. (1985) 349. 

Mainly aircrete, sandlime bricks, other calcium silicate products and refractories. Mainly mortar, render, plaster, and drying/improvement/stabilisation of soils. Mainly potable water, sewage, liquid effluent and gaseous effluent treatment. 

The reactor auxiliary systems are similar to those found on other PWRs and typically include a primary water volume control and inventory system, a primary water purification system, radioactive liquid and gaseous effluent treatment systems, and a ventilation system. At low power levels, many of these systems may be required only on an intermittent basis and would be valved out during periods of autonomous operation. 

The estimated total accumulated amount of I that will be produced in U.S. nuclear power reactor fuels through the year 2000 is about 2500 curies. If reprocessing resumes and decontamination factors of 500 exist for gaseous effluent treatment systems, only about 5 Ci of this total will have been released to the environment from fuel reprocessing plants. The remainder will be incorporated into solid wastes appropriately isolated from the biosphere. 

Processing and Treatment of Gaseous Effluent Streams, 43 Effluent Management, 44... 

An evaluation of the CST (including its effluent gas treatment system) for treatment of wood dunnage and DPE suit material indicates successful treatment of both materials. Also, the test report noted that additional design and development for the solid materials handling and gaseous effluent systems were under way as this report was being prepared. 

Since bacteria are able to retain their dehalogenase activity after dehydration, this new process could allow direct continuous treatment of gaseous effluents. The two main points are that there is no need to transfer the pollutant in an aqueous phase and there is also no longer limitation by solubility, and secondly that microorganisms are no longer growing. If we consider that transfers in the gas phase are much more efficient than those in the liquid phase, this also means that the rate of degradation should be far less limited by transfer and diffusion rate of the... 

Any liquid, gaseous or aerosolic waste discharged in the environment. Generally, it is a complex mixture. For example, wastewaters include mine water effluent, mill process effluent, tailings impoundment area effluent, treatment pond or treatment facility effluent, seepage and surface drainage. Volume 1(9,10,14), Volume 2(2,5). 

The usual gaseous effluent of SCWO treatment of waste containing carbon, hydrogen, oxygen, and nitrogen consists of the oxidation products... 

Liquid acidic wastes from the process were neutralised to form solid gypsum that was then sold to the building, paper and farming industries. The gaseous effluent, carbon dioxide, was sold to the beer and beverage industries. Finally, the iron salts were isolated and sold to the water treatment industry. In 1994 some 580000 tonnes of these products were sold to these industries. 

The treatment is materialized by three beds of packings in a column operating around 45°C at Ifae top, 150 at the bottom, and under low pressure 0.2.20 Pa. This procedure helps to avoid the formation of polymers by an excessive temperature rise, but requires recompression of the rKyded gaseous effluents. 

Treatment of gaseous effluents—Polymeric as well as low-molecular-... 

FIGURE 25.16 Schematic representation of the coupled separation and chemisorption of H2S in the treatment of gaseous effluent using a microporous membrane containing ZnO nanoparticles. 

First, the treatment produced hazardous by-products from TNT. Second, the technology had high capital costs. Third, lagoon slurries had to be diluted prior to treatment. Fourth, gaseous effluents from the oxidation process, such as carbon monoxide (CO), C02, and NO, needed to be treated by another technology. Finally, the laboratory-scale system was found to have a 5 to 10% down time, because clays blocked the pump system and heat exchange lines, and solids built up in some of the... 

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