Abstract: A method of treating produced water, such as frac flowback, that includes pre-treating the produced water which is followed by a crystallization process that produces a condensate that typically includes ammonia and benzene. The ammonia and benzene concentration is reduced by biologically nitrifying and denitrifying the condensate. This produces an effluent that is directed to a solids-liquid separation process that removes suspended solids. The solids-liquid separation process produces another effluent that is subjected to a benzene polishing process that further reduces the benzene concentration of the effluent produced by the solids-liquid separation process.

Abstract: A method of treating produced water, such as frac flowback, that includes pre-treating the produced water which is followed by a crystallization process that produces a condensate that typically includes ammonia and benzene. The ammonia and benzene concentration is reduced by biologically nitrifying and denitrifying the condensate. This produces an effluent that is directed to a solids-liquid separation process that removes suspended solids. The solids-liquid separation process produces another effluent that is subjected to a benzene polishing process that further reduces the benzene concentration of the effluent produced by the solids-liquid separation process.

Abstract: A head support for a pushchair comprises a support section, a seat connection section and a back support. The support section forms a U-shape and comprises an armature, comprising sides, that provides stiffness to the support section. The seat connection section is coupled to the support section and is for connecting to the pushchair. The back support is connected to the support section or connectable to the support section and configured such that, when connected to the support section, it prevents the sides of the armature from dropping relative to the back support in use.

Abstract: A head support for a pushchair comprises a support section, a seat connection section and a back support. The support section forms a U-shape and comprises an armature, comprising sides, that provides stiffness to the support section. The seat connection section is coupled to the support section and is for connecting to the pushchair. The back support is connected to the support section or connectable to the support section and configured such that, when connected to the support section, it prevents the sides of the armature from dropping relative to the back support in use.

Abstract: A density enhancing amine compound is incorporated into a silver halide element containing both spectrally sensitized and non-spectrally sensitized silver halide grains in the emulsion layer.