Abstract: Techniques are described for automatically and dynamically determining, at the time that items are being returned from customers, how to handle the returns of the items. A variety of factors may be considered to determine appropriate item return handling for an item, including by assessing current conditions at the time of the item return. In addition, the dynamic item return handling may include selecting one of a variety of potential return locations for each item being returned and one of a variety of types of return routing for the return. After the item return handling is dynamically determined, information may be provided to the customer to facilitate the item return in the determined manner. This abstract is provided to comply with rules requiring an abstract, and with the intention that it will not be used to interpret or limit the scope or meaning of the claims.

Abstract: Butane-utilizing bacteria are used to degrade pollutants comprising polychlorinated biphenyls (PCBs). In-situ or ex-situ techniques may be used to reduce or eliminate PCB pollutants from liquid, gas and solid sources. In a preferred embodiment, PCB concentrations in various aqueous environments are reduced by contacting a contaminated water source with butane-utilizing bacteria in the presence of oxygen to degrade the PCB by cometabolism or direct metabolism. Suitable butane-utilizing bacteria include Pseudomonas, Variovorax, Nocardia, Chryseobacterium, Comamonas, Acidovorax, Rhodococcus, Aureobacterium, Micrococcus, Aeromonas, Stenotrophomonas, Sphingobacterium, Shewanella, Phyllobacterium, Clavibacter, Alcaligenes, Gordona, Corynebacterium and Cytophaga.