Waste water, recovery

Recoflo An ion-exchange process based on short beds and small beads. Developed by the University of Toronto in the 1960s and commercialized by Eco-Tec, Canada. Used for waste-water recovery and removal of metals from various metallurgical waste streams. In 1988,500 units had been installed in 27 countries. 

This area of recombinant DNA technology also has application in the degradation of solid waste materials In waste water recovery, in leaching minerals from ore-containing rock, in improved oil recovery, and in the decontamination of chemical waste dumps through the engineering of microorganisms that can destroy specific toxic contaminants. 

The use of polysulfone allows for the easy manufacturing of membranes with controllable size of pores down to 40 nanometers. Such membranes are used in applications such as hemodialysis, waste water recovery, food and beverage processing, and gas separation. Also, polysulfone can be reinforced with glass fibers to form composite materials. Further, it is used as a dielectric material in capadtor applications. 

Owing to the cycHc nature of the TBRC operation, waste heat recovery from the off-gases is not practical and the SO2 content of the gas varies with the converter cycle. In order to supply a relatively uniform flow and strength SO2 gas to a sulfuric acid plant, a system has been installed at RonnskAr whereby the SO2 from fluctuating smelter gases is partially absorbed in water. During smelter gas intermption, SO2 is stripped with air and the concentrated gas deflvered to the acid plant. 

To reduce costs of the more expensive platiag solutioas and decrease the amount of hazardous or regulated material ia a waste stream, recovery and reuse of the drag-out is a common practice. This is done by closing off the water flow to the first tinse tank foHowiag the process tank, and periodicaHy... 

For PM control from combustion sources, the tlue gas enters a coagulation area (e.g., ductwork, a chamber, or a cyclone) to reduce the number of ultrafine particles, and then a gas conditioner to cool the gas to a suitable temperature and saturation state. This is generally accomplished by means of a waste heat recovery heat exchanger to reduce the temperature of the flue gas or by spraying water directly into the hot flue gas stream. 

Remco Engineering - Manufacturer of systems for water treatment, waste water recycling, heavy metal recovery and filtration. Provides some good general information plus vendor specific, http //www.remco.com. ... 

Recently, anaerobic filter process has been widely used for the treatment of various waste-waters because of several advantages over aerobic process such as lower nutrient requirement, less surplus sludge production, and energy recovery via methane production [1]. Although many types of anaerobic filter process have already been successfully commercialized, the details of their complicated process dynamics are still challenging issues to be clarified for their stable operations. 

Cold-pressed essential oils from the peel are some of the most important by-products recovered during the processing of Citrus fruits. The presence of limonene in the aqueous discharges, with its antimicrobial activity [1], decreases the effectiveness of the waste treatment system and increases the time necessary for the biological breakdown of the organic matter produced in the peel oil recovery system [2,3]. Additional recovery of essential oils from waste water would increase industry s returns and reduce the pollution problems associated with the disposal of waste water [4,5]. Several methods for reducing the levels of residual essential oils in the aqueous effluent have been developed over the years [6-11]. 

The zone elution method has been used for quantitative estimation or recovery of heavy metals in plants and vegetable juices [29], mercury (11) in river and waste waters [52], zinc in different environmental samples [46], nickel and copper in alloys [53], zirconium in Mg-Al alloys [22], cobalt, zinc, nickel, and copper in natural water and alloy samples [54], thiocyanate in spiked photogenic waste water [55], and aluminum in bauxite ores [42],... 

Hydrogenation of the nitrobenzene Separation of the reactor products by condensation Recovery of crude aniline by distillation Purification of the crude nitrobenzene Recovery of aniline from waste water streams... 

Dunlop, E. H., in New Processes of Waste Water Treatment and Recovery, Ellis Horwood, Chichester, England, 1978, 177. 

LLE has been used in the past for the extraction of pesticides from environmental water samples [17]. However, its application in the extraction of waste-water samples is scarce due to the low efficiency of extraction, especially for polar analytes. Because of the vast amount of surfactants and natural products present in wastewater samples, emulsions are formed which complicate the process of extraction and lead to low extraction recoveries. However, there have been some useful applications of LLE to wastewater analyses. For example, LLE was found to be effective for the isolation of herbicide and pesticide organic compounds from industrial wastewater samples and also from complex matrices [18]. 

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