摘要:
Contaminants, such as volatile organic compounds, are removed from an environmental medium, such as contaminated soil, rock, groundwater, waste water and the like, by treatment with a combination of a persulfate, such as a sodium persulfate, and hydrogen peroxide.
摘要:
A method of reducing the organic compounds in an aqueous stream by generating an oxidant in-situ using at least one electrolytic cell. The method may comprise contacting at least a portion of the aqueous stream with the electrolytic cell. The electrolytic cell may have at least two electrodes, wherein at least one electrode is a metal electrode and, a power source for powering the at least two electrodes. A water treatment system for generating an oxidant in-situ comprising at least one electrolytic cell. The electrolytic cell may have at least two electrodes, wherein at least one electrode is a metal electrode, and a power source for powering the at least two electrodes. A method of improving the rejection rate of a reverse osmosis membrane using an oxidant generated in-situ. The method may comprise contacting at least a portion of the aqueous stream with the electrolytic cell thereby creating an oxidized aqueous stream. At least a portion of the oxidized aqueous stream may be fed through a reverse osmosis membrane. The electrolytic cell may comprise at least two electrodes, wherein at least one electrode is a metal electrode, and a power source for powering the at least two electrodes.
摘要:
Processing contaminated water containing volatile or/and semi-volatile compounds via flash evaporation. Method and system include: superheating contaminated water (via a superheating unit), for forming superheated contaminated water having a temperature equal to or higher than a predetermined threshold temperature; flash evaporating the superheated contaminated water (via a flash evaporation unit), for forming superheated contaminated steam; and thermally oxidizing the superheated contaminated steam (via a thermal oxidation unit), so as to thermally oxidize the volatile compounds contained therein, and form thermal oxidation gas/vapor products. Optionally, further includes integrated configuration and operation of a process control/data-information processing unit, and a heat recycling unit. Results in obtaining high yields and high energy efficiencies for removal of volatile compounds from contaminated water. Particularly applicable for processing water contaminated with volatile organic compounds (VOCs) or/and semi-volatile organic compounds (SVOCs), and volatile or/and semi-volatile inorganic compounds.
摘要:
A method of treating a mixture of microorganisms with readily biodegradable carbon compounds (RBCs) in the form of one or more volatile fatty acids (VFAs), by first inducing the mixture microorganisms to release phosphorus and magnesium which is then tapped o as the mixture is thickened, to produce a phosphorus/magnesium-nch liquid and a phosphorus/magnesium-reduced treated mixture This treated mixture is placed in an anaerobic digester where ammonia is formed, but combines very little with phosphorus or magnesium Next the high-ammonia mixture is dewatered to produce an ammonia-rich liquid, which is combined with the phosphorus and magnesium-rich liquid and reacted to form struvite In one preferred embodiment, VFAs are formed in situ via an upstream unified fermentation and thickening (UFAT) process and added to the waste sidestream to strip phosphorus and magnesium found therein In another preferred embodiment a usable struvite product is harvested.
摘要:
The present disclosure relates to a filter assembly (100) for an oil separator (200). The filter assembly comprises: at least one filter element comprising activated carbon (102); a filter element comprising a reticulated foam (104); and a coalescing filter element (108). In use, the at least one filter element comprising activated carbon (102) is positioned at the downstream end of the filter assembly (100). The disclosure further relates to an oil separator (200) comprising: a filter assembly (100) as described above; a settling chamber (212); an inlet (214); an outlet (216); and a housing (210). The filter assembly (100) is coupled to the outlet (216).
摘要:
A device for the purification of exhaust air produced during the processing of wood materials comprises a first circuit (A) having a scrubber (2), a mist eliminator (4) and a regeneration container (7). In order to strip the washing liquid from organic substances, a second circuit (B) is provided and serves to remove a sub-stream of the washing liquid from the first circuit (A) and supply it to a desorber (12). The washing liquid purified in this way is recirculated to the first circuit (A).
摘要:
The is described a process for determining a validated Reduction Equivalent Dose for reducing the concentration of a target contaminant contained in a fluid in a radiation fluid treatment system. In one embodiment, the process comprises the steps of: (a) determining a short wavelength Reduction Equivalent Dose for the target contaminant or a challenge contaminant in a first region of the electromagnetic spectrum having a wavelength of less than or equal to about 240 nm; (b) determining a long wavelength Reduction Equivalent Dose for the target contaminant or a challenge contaminant in a second region of the electromagnetic spectrum having a wavelength of greater than about 240 nm; and (c) summing the short wavelength Reduction Equivalent Dose and the long wavelength Reduction Equivalent Dose to produce the validated Reduction Equivalent Dose for the target contaminant. In a preferred embodiment, the present invention provides a useful approach for determining the relevant Reduction Equivalent Dose (RED) for Cryptosporidium disinfection and accomplishes this by using the discovered relation between the short wavelength sensor signal and the short wavelength RED, and subtracting the short wavelength RED from the RED determined using a challenge microbe with synthetic lamp sleeves, to obtain the long wavelength RED applicable to Cryptosporidium disinfection. In a bioassay, one would only need the short wavelength sensor reading and the challenge microbe RED using synthetic lamp sleeves to determine the applicable RED, once the relationship between the short wavelength sensor reading and the short wavelength RED was established.
摘要:
The invention relates to a method for producing raw iron (RE) or liquid steel precursors. Raw materials comprising iron ore and optionally additive materials are reduced in at least one reduction unit (2) by means of a reduction gas, and at least parts thereof are smelted in a smelting unit (1) while adding carbon and forming the reduction gas (RG). Reduction gas from the smelting unit (1) and/or top gas (TG) from the reduction unit (2) are subjected to cleaning. The process water accruing from the wet cleaning is degassed and volatile organic compounds (VOC) are thereby separated from the process water.
摘要:
Process for the purification of an aqueous stream coming from the Fischer-Tropsch reaction, which comprises feeding a part of said aqueous stream to a saturator, feeding a part of said aqueous stream to a distillation and/or stripping column, feeding the aqueous stream leaving the head of said distillation and/ or stripping column to said saturator. Said process allows at least a part of the aqueous stream coming from the Fischer-Tropsch reaction to be used as process water in the synthesis gas production plant, subsequently sent to the Fischer Tropsch plant for the production of hydrocarbons.