The present disclosure discloses a treatment process and treatment system of enhanced up-flow multiphase wastewater oxidation. The treatment process includes the following steps: 1) the wastewater is fed into the up-flow multiphase wastewater oxidation system for oxidation treatment; 2) the wastewater is fed to the solid-liquid separation system for solid-liquid separation, the separated heterogeneous catalytic carrier (5) is fed back to the up-flow multiphase wastewater oxidation system, and the wastewater is fed to the neutralization and degassing system; 3) the wastewater is fed to the neutralization and degassing system to adjust a pH of the wastewater to 5.5-7.5, and then is degassed by stirring; 4) the wastewater is fed to the flocculation and sedimentation system for sludge-water separation, a supernatant is discharged, and an outward harmless treatment is performed after a pressure filtration of a sedimentary iron sludge.

A method of removing chemical contaminants from a composition comprising an active, a solvent, and a contaminant can include providing an initial feed supply, wherein the initial feed supply comprises the active, the solvent, and the contaminant, wherein the contaminant can include 1,4 dioxane, dimethyl dioxane, or a combination thereof; including filtering the initial feed stock through a nanofilter and using reverse osmosis.

The present invention relates to a groundwater circulation well system with pressure-adjustable hydrodynamic cavitation, including a circulation well body, a sucked and injected water circulation assembly and a hydrodynamic cavitator. The sucked and injected water circulation assembly is based on a water suction and injection pump. The hydrodynamic cavitator is provided, inside a vortex chamber, with a vortex water inlet column capable of changing a water passing aperture. The hydrodynamic cavitator is capable of changing a bubbling pressure and a breaking pressure of hydrodynamic cavitation bubbles in the vortex water inlet column. The hydrodynamic cavitator generates vortices in the circulation well body to accelerate uniform mixing of a remediation agent and the groundwater. Energy from collapsing and bursting of the hydrodynamic cavitation bubbles activates the remediation agent such that contaminants in the groundwater are efficiently degraded.

A method of preparing a FeMnCeO.sub.x biomaterial is provided, including the following steps. A Pseudomonas sp. strain KW-2 is obtained. A culture medium with a pH of 6.5-7.8 is prepared, which includes 0.1 g/L K.sub.2HPO.sub.4, 0.2 g/L MnSO.sub.4.Math.7H.sub.2O, 0.2 g/L NaNO.sub.3, 0.1 g/L CaCl.sub.2), 0.1 g/L NH.sub.4Cl, 0.1 g/L (NH.sub.4).sub.2CO.sub.3, 35 g/L NaCl and 150 mg/L ferric ammonium citrate. The culture medium is autoclaved, inoculated with the KW-2 strain, cultured for 1-3 days, added with a cerium nitrate solution, cultured for 3-7 days and centrifuged at 4,000-8,000 rpm for 10-20 min to collect a precipitate. The precipitate is rinsed 5-8 times with deionized water and 0.01 mol/L phosphate buffered saline (PBS) and freeze-dried at ?60? C. to obtain the FeMnCeO.sub.x biomaterial. A method for treating antibiotic wastewater using the FeMnCeO.sub.x biomaterial is also provided.

The system comprises a pre-denitrification unit, an anaerobic ammonia oxidation unit, an advanced denitrification unit and a Fenton unit. The pre-denitrification unit is configured for hydrolyzing suspended pollutants and soluble organic matters in wastewater into organic acids, oxidizing ammonia nitrogen into nitrate, and finally converting the nitrate into nitrogen and absorbing phosphorus. The anaerobic ammonia oxidation unit is configured for converting a part of ammonia nitrogen in the wastewater into nitrite nitrogen through short-cut nitrifying bacteria and reacting the ammonia nitrogen with the nitrite nitrogen through anaerobic ammonia oxidation bacteria to generate nitrogen. The advanced denitrification unit is configured for reducing nitrate nitrogen into nitrogen through a carbon source and removing residual ammonia nitrogen, COD.sub.Cr and BOD.sub.5. The Fenton unit is configured for removing refractory organic matters and metal ions and adjusting the pH value of discharged water, so that the discharged water reaches the standard.

Provided is a catalyst for a Fenton system, and a method of preparing the same. The catalyst includes one or more species of d.sup.0-orbital-based or non-d.sup.0-orbital-based catalyst including NO.sub.3.sup./SO.sub.4.sup.2/H.sub.2PO.sub.4.sup./HPO.sub.4.sup.2/PO.sub.4.sup.3 functional groups on the surface thereof. The method includes preparing a d.sup.0-orbital-based or non-d.sup.0-orbital-based transition metal oxide; and preparing a transition metal oxide catalyst comprising a NO.sub.3.sup., SO.sub.4.sup.2, H.sub.2PO.sub.4.sup., HPO.sub.4.sup.2, or PO.sub.4.sup.3 functional group on the surface of the catalyst via nitrification, sulfation, or phosphorylation of the transition metal oxide.

The present application provides a method for treating and recycling organic wastewater, comprising: 1) pretreating the organic wastewater; 2) subjecting an effluent obtained after pretreatment in step 1 to a heterogeneous Fenton reaction with Hangjin clay-supported nano-Fe.sub.3O.sub.4 as a catalyst, separating the catalyst from a reaction solution after completion of the reaction, and subjecting the reaction solution to a reaction to remove COD; 3) subjecting an effluent obtained in step 2 to an anaerobic ammonia oxidation reaction to denitrify by ammonia nitrogen reacting with nitrite nitrogen; 4) subjecting an effluent obtained in step 3 to an aerobic microbial decomposition and ultrafiltration membrane separation to remove COD and ammonia nitrogen; 5) filtering an effluent obtained in step 4 to remove large particles; 6) supplying an effluent obtained in step 5 to an RO system, and using an effluent from the RO system as circulating cooling water, and subjecting concentrated water from the RO system to a softening treatment; and 7) supplying softened concentrated water obtained in step 6 to an NF system for treatment, evaporating an effluent obtained after the treatment to recover NaCl, and returning a resulting concentrated water to step 1. The present application also provides a device for implementing the method for treating and recycling an organic wastewater.

A process for treating an aqueous solution (A) derived from a method of producing a compound with the formula (I): (I) wherein R1 and R2 are identical or different and are chosen from among hydrogen and C1-C5 alkyl, wherein R1 and R2 together form a methylene group, and wherein R3, R4, R5 and R6, which are independently identical or different, are chosen from among: a hydrogen atom, a hydroxy group (OH), an alkoxy group (OR), an alcohol group (ROH), an aldehyde group (CHO), a ketone group (C(O)R), an acid group (COOH), a nitrile group (CN), a C1-C6 alkyl chain, linear or branched, saturated or unsaturated, potentially comprising one or a plurality of substitutes in a terminal or lateral position or one or more functions in said alkyl chain, R being a C1-C5 alkyl, wherein the aqueous solution (A) comprises at least one sulfate salt SO.sub.4.sup.2 (S) rendered soluble and at least one aromatic organic compound (O) formed during the method for producing the compound (I), and wherein the process comprises at least one step (i) of recovering a solid sulfate salt (S) in an at least partially anhydride form separately from the aqueous solution (A). ##STR00001##

A deeply processing method for highly contaminated wastewater having salts and volatile organic compounds includes the steps of: performing mechanical vapor recompression on the wastewater to form a first concentrate liquid and a first condensing liquid; performing drying on the first concentrate liquid to form a waste solid and a second condensing liquid; performing reverse osmosis on the first condensing liquid and the second condensing liquid to form a filtrate and a second concentrate liquid; performing Fenton's oxidation on the second concentrate liquid to form an oxidized liquid; and performing mechanical vapor recompression, drying, reverse osmosis, and Fenton's oxidation as above on the oxidized liquid in sequence. Additionally, active carbon adsorption is optionally performed on the filtrate to form a re-filtrate.

A device for treating a liquid including an organic pollutant, the device including: a device for injecting, into the liquid, microbubbles of an containing fluid containing an oxygenated constituent, the oxygenated constituent being capable of reacting with the ferrous cations Fe.sup.2+ so as to generate hydroxyl radicals OH and hydrogen peroxide H.sub.2O.sub.2; a cavitation generator capable of generating bubbles in the liquid by cavitation; a bubble implosion chamber; a generator of ferrous cations Fe.sup.2+, the cavitation bubble implosion chamber being placed in a region in which the liquid contains the ferrous cations.