A vacuum-flocculation-solidification integrated apparatus for waste mud and a using method thereof are provided, and the apparatus includes an outer support truss, a vacuum barrel wall, a flocculation stirring device, and a rotary spraying solidification device. The using method of the apparatus includes: flattening a site and installing a support truss and a vacuum barrel wall; assembling a flocculation stirring device and then hoisting and installing to a top of the vacuum barrel wall; checking an air tightness; adding an APAM flocculant, starting the flocculation stirring device and a vacuum pump; starting an air compressor; and squeezing solidified soil from soil outlets. Beneficial effects of apparatus are that: multiple procedures of flocculation, vacuum drainage, solidification and discharging soil for the waste mud are continuously performed; a solidification agent is fully mixed with solidified soil through rotary spraying; and the apparatus is convenient to be disassembled, reassembled, and reused.

A method of treating a liquid by creating nanobubbles of a desired gas within a target liquid and allowing the desired gas to react with a target component of the target liquid. The desired gas can be selected to be reactive with the target component, and a desired liquid can be formed after the desired gas reacts with the target component.

The invention relates to a method for the purification of acrylamido-2-methyl-2-propanesulphonic acid comprising the following successive steps: 1) preparation of a suspension of acrylamido-2-methyl-2-propanesulphonic acid crystals by distillation of an aqueous solution of acrylamido-2-methyl-2-propanesulphonic acid in order to obtain a suspension of acrylamido-2-methyl-2-propanesulphonic acid crystals, 2) isolation of the acrylamido-2-methyl-2-propanesulphonic acid crystals generally by solid/liquid separation from said suspension in order to isolate said acrylamido-2-methyl-2-propanesulphonic acid crystals, characterised in that the distillation step is carried out continuously and at a pressure below atmospheric pressure. The invention also relates to a polymer obtained from acrylamido-2-methyl-2-propanesulphonic acid crystals or its salts, obtained according to such a method, and to the use of said polymer in oil and gas recovery, in water treatment, in sludge treatment, in manufacturing paper, in construction, in mining, in cosmetic formulation, in detergent formulation, in textile making, or in agriculture.

The purpose of the present invention is to provide a treatment method by which, even for wastewater with organic constituents constituting a large portion of organic wastewater as a whole and suspended solids (SS) and with a large negative charge ratio, organic nitrogen constituents and phosphorus compounds can be efficiently separated and collected and good-quality separated water can be obtained by reducing the quantity of SS, BOD, COD, and nitrogen constituents in the separated water. Provided is a treatment method for organic waste water, in which a flock is formed by adding a polymer flocculant to organic waste water with organic nitrogen constituent content in relation to suspended solids (SS) being 4-50%/SS and organic nitrogen constituent content being 250-50,000 mg/L, and thereafter, the flock is separated from the organic wastewater by solid-liquid separation.

The present invention entails dual centrifuges configured to remove suspended solids, silica, and other precipitants from evaporator brine prior to the brine being disposed of via deep well injection. First, the evaporator brine is directed through a highly efficient first centrifuge configured to remove essentially all suspended solids, including very small suspended solids that typically cannot be retained in a filter or other dewatering devices. The centrate from the first centrifuge, depleted in suspended solids, silica and other precipitants, can be disposed of via deep well injection. The first centrifuge also produces a slurry that is directed to a separate centrifuge that produces a second centrate and waste wet cake. The second centrate is recycled and mixed with the evaporator brine and the mixture is directed to the first centrifuge.

The invention relates to the treatment of mine tailings in the form aqueous effluents comprising solid particles. With the process of the invention it is possible to separate all or part of the water from an aqueous effluent comprising solid particles. This process comprises (a) adding to the effluent at least one anionic modified natural polymer selected from among anionic guar gums and/or anionic starches, then (b) adding at least one cationic modified natural polymer selected from among cationic starches and/or cationic dextrans and/or cationic chitosans. The invention also relates to a composition comprising an aqueous effluent comprising solid particles treated with an anionic modified natural polymer and a cationic modified natural polymer. Preferably, it concerns a composition comprising an aqueous effluent comprising solid particles, at least one anionic modified natural polymer selected from among anionic guar gums and/or anionic starches, and at least one cationic modified natural polymer selected from among cationic starches and/or cationic dextrans and/or cationic chitosans.

The disclosure relates to a microbial cellular biomass having flocculant properties, to its obtaining process and to its use in the treatment by flocculation.

A method of treating a liquid by creating nanobubbles of a desired gas within a target liquid and allowing the desired gas to react with a target component of the target liquid. The desired gas can be selected to be reactive with the target component, and a desired liquid can be formed after the desired gas reacts with the target component.

A method for chromium removal from post-tanning wastewater includes the following steps: (a) mixing pretreated post-tanning wastewater with an induction reagent to allow an induction reaction; and (b) adjusting a pH of a mixture obtained after the induction reaction to higher than 7.0 for precipitation; where the induction reagent includes a soluble metal salt. In the treatment method of the present disclosure, pretreated post-tanning wastewater is mixed with an induction reagent, a small amount of neutral chromium complexes remaining in the wastewater are converted into cationic chromium complexes under the action of the induction reagent (that is, a charge property of the chromium complex is changed), and then a pH is adjusted for precipitation to remove chromium, which greatly improves the removal efficiency of chromium in wastewater.

Disclosed herein are the water clarification compositions and method of using the disclosed water clarification compositions for clarifying a water system or waste water source. Specifically, the disclosed compositions comprise and methods use multiple charged cationic or anionic compounds that are derived from polyamines through an aza-Michael addition with an activated olefin having an ionic group. The disclosed water clarification methods or compositions are found to be more effective than those methods or compositions including commonly used single quaternary compounds for reducing turbidity in water systems or waste water sources.