Effluent containing organic impurities which are difficult to degrade is purified by oxidation in the aqueous phase at temperatures of 100.degree. to 310.degree. C. and under elevated pressure. This is effected by initially treating the effluent in a first stage with gases containing oxygen, but without the addition of catalysts, until the C.O.D. value has been reduced by 50 to 98%. The effluent which has received preliminary treatment in this way is subsequently treated, in a second stage, with...

In the wet oxidation of waste materials with an oxidizing gas, the process is carried out in a horizontally-elongated reactor vessel divided into generally cylindrical, interconnecting, compartments. An aqueous dispersion of the wastes is continuously introduced into a compartment at one end of the reactor vessel, and flows from compartment to compartment while an oxidizing gas is continuously introduced into each compartment. The dispersion is vigorously agitated to disperse the oxidizing gas, ...

A wet oxidation system including an air stream for treating an organic containing aqueous stream which is characterized by a tendency to polymerize when heated in the absence of air, the improvement being in splitting the air stream, part of the air being added before the heat exchanger and the remainder of the air being added after the heat exchanger, the division of the air being determined to be that amount which is necessary to be added before the heat exchangers to prevent polymerization.

A process for treating a waste feed stream containing essentially water-soluble organic wastes is described as involving heating the stream under turbulent flow conditions to temperatures of 400.degree. to 700.degree. F. and pressures of 300 to 3100 p.s.i. in the presence of air or of oxygen thereby splitting off carbon dioxide. The oxidized waste stream, which has a considerably reduced chemical oxygen demand, is continuously fed to a hot contacting zone and is in heat-exchange relationship wit...

A process for treating a waste feed stream containing essentially water-soluble organic wastes, in particular those originating in refinery reservoirs, refinery waste streams, refinery pits, and lube oil additive plants, is described as involving heating the stream under turbulent flow conditions to temperatures of 400.degree. to 700.degree.F and pressures of 300 to 3,100 psi in the presence of air or of oxygen thereby splitting off carbon dioxide. The oxidized waste stream, which has a consider...

The invention relates to a process for eliminating nitrogenous organic compounds from a salt-containing water which contains more than 0.5% by weight of salt in the form of CaCl.sub.2 or NaCl, less than 200 ppm of dissolved carbonic acid or carbonates and more than 50 ppm of nitrogenous organic compounds, by treating the water by wet oxidation at a temperature of below 100.degree. C. with chlorine or a chlorine-containing oxidizing agent and feeding this, preferably after additional oxidation wi...

Heat exchange means and method for a continuous wet oxidation apparatus for treating organic waste sewage employing a reactor within which the sewage is treated in the presence of heat, includes handling the influent by means providing a continuous hydraulic circuit for the passage of waste sewage to the reactor, such influent means comprising in series a holding tank communicating downstream with a high pressure pump acting to drive the influent through a low pressure heat exchanger a high pres...

An underwater electric light fixture which includes an elongated transparent tube sealed at each end and provided with an electric bulb positioned therein. Each end of the bulb is received in an adjustable socket located at opposed axial ends of the transparent tube. Widely spaced apart connectors attached to the outer ends of opposed bulb sockets allow replacement of the entire light fixture by a simple unplugging action without power shutoff and without arcing between the unplugged connectors....

There is provided a process for purification treatment of wastewater containing an organic substance. There is provided a process for purification treatment of wastewater containing an organic substance by carrying out supercritical treatment or subcritical treatment, which comprises subjecting the wastewater to at least one solid-liquid separation pretreatment selected from separation treatment with a flocculant, sedimentation treatment, flotation treatment and filtration treatment; and then su...

With the process according to the invention for the purification of salt-charged waste water by wet oxidation of organic constituents under supercritical conditions, the reaction is performed in the form of a flame (5). In this case the supercritical zone is surrounded with a subcritical by-pass flow (4) formed from cooling water. At one end of the reactor (1) constructed as a cylindrical pressure vessel are provided at least one burner nozzle (2) and at least one annular inlet point (48), surro...