The present disclosure discloses a cellulose nanocrystal-supported sodium alginate adsorbent and use thereof in enriching organic phosphorus in wastewater, belonging to the technical field of environmental engineering. Cellulose nanocrystals are prepared from papermaking deinking sludge through chemical conditioning, drying, crushing, chemical oxidation and microwave assisted separation, and then supported on alginate under weakly acidic conditions to provide the cellulose nanocrystals with the ability to enrich organic phosphorus in wastewater. By using this method, the content of organic phosphorus in the wastewater can be significantly reduced, the total phosphorus in the effluent can be reduced, and the wastewater treatment effluent can satisfy the discharge standard. The enriched organic phosphorus can be recycled as a phosphorus resource through incineration. In addition, the papermaking deinking sludge is made into the product with a high added value, so the applicability of the papermaking deinking sludge is broadened. The present disclosure has high feasibility.

A method for controlling treatment of an industrial water system is disclosed. The method comprises the steps of providing an apparatus for controlling delivery of at least one treatment chemical, the apparatus comprising at least one sensor and an electronic input/output device carrying out a protocol; measuring a parameter of the industrial water system using the at least one sensor; relaying the measured parameter to the electronic device; adjusting the protocol based on the measured parameter; delivering a concentrated treatment chemical into a stream of the industrial water system according to the adjusted protocol, the concentrated treatment chemical comprising an active ingredient, the active ingredient traced as necessary, the active ingredient having a concentration; repeating the measuring, the adjusting, and the delivering; and optionally repeating the steps for n-number of parameters, n-number of active ingredients, and/or n-number of concentrated treatment chemicals.

The invention pertains to a method of optimizing the chemical precipitations process in water treatment plants and waste water treatment plants using an aluminum based coagulant, wherein the optimization, which comprises the degree of contamination of the Clear water phase after precipitation and sludge separation, cost of operation and sludge production, is obtained by in situ regulation, of precipitation pH, amount of coagulant that is used in the precipitation process and the basicity of the coagulant, based at least on online measurement of degree of contamination, pH, flow and temperature of incoming untreated water and/or in the clear water phase, characterized in that the basicity of the coagulant is regulated by adding in situ, to a stock solution of polymerized aluminum based coagulant (A), acid or a solution of an aluminum based coagulant (B) having a lower basicity than the polymerized aluminum based coagulant (A) in the stock solution.

Disclosed are a core-shell structure membrane scale inhibitor and a preparation method therefor, wherein the core-shell structure membrane scale inhibitor has a core emulsion obtained via emulsion polymerization, and a shell structure obtained via ultraviolet-light grafting functional monomers. The preparation method has first preparing a core by using an emulsion polymerization process, adding a reactive photo-initiator in the later stage of polymerization, so that the reactive photo-initiator is grafted on the surface of the core, and finally initiating the polymerization of functional monomers by means of ultraviolet light to obtain a core-shell structure membrane scale inhibitor. The surface structure of the core is modified, such that a large number of ionizable groups are grafted on the surface thereof, and thus, a large number of scaling ions such as Ca2+, Mg2+ and Al3+ can be adsorbed.

A method treats an aqueous system to inhibit growth of one or more micro-organisms therein and/or to reduce the number of live micro-organisms therein. The method includes adding treatment agents to an aqueous system wherein said treatment agents include (a) a phosphonium compound; and (b) a compound having formula: M(XO.sub.2).sub.n wherein: M is a Group I or Group II metal; X is a halogen; and n is 1 or 2.

The invention relates to a method for treating wastewater in an activated sludge process, which comprises a biological treatment step followed by a sedimentation step for separation of sludge and treated effluent water. The method comprises directing a part of the treated effluent water as a backflow from the sedimentation step to the biological treatment step, the backflow having an original pH value; adjusting the backflow pH from the original pH value to a first pH value between the sedimentation step and the biological treatment step, and adding a coagulant and/or an oxidant to the backflow after the adjustment of the backflow pH to the first pH value and before backflow's entry to the biological treatment step.

A method for manufacturing a fibrous web, such as web of paper, board, tissue or the like is disclosed. The method includes obtaining at least one fibre suspension of lignocellulosic and/or cellulosic fibres and feeding the fibre suspension into an intermediate residence entity. The fibre suspension including bacterial endospores, is discharged out of the intermediate residence entity via an outlet after a residence time of at least 2 hours in the intermediate residence entity and after a time delay the fibre suspension is formed into a fibrous web. Bacterial endospores are sensitized by adding a germinant surfactant including a primary or secondary ammonium head group and a linear unsubstituted C12-alkyl tail, to the fibre suspension at an addition point located at a lower part of the intermediate residence entity or after the outlet of the intermediate residence entity, but before the formation of the fibrous web.

A method for producing an aqueous copolymer solution, which comprises dissolving a copolymer of (meth)acrylamide and at least 1 mol-% cationic monomers, calculated from total amount of monomers in the dissolving water having calcium hardness of at least mg/l, expressed as Ca.sup.2+, and adding acid comprising monoprotic organic acid and/or mineral acid to the dissolving water and/or the aqueous solution of the copolymer in an amount sufficient to provide the aqueous solution of the copolymer with a pH of equal to or less than 4.5. The invention also relates to uses of the obtained polymer solutions in manufacturing of paper, board or the like or in treatment of sludge or water.

The present invention provides a kind of an integrated sewage treatment equipment for paper mill, which belongs to the technical field of sewage treatment, includes a box body, and the box body is arranged a water injection gap on the upper part at one side, the bottom of the box body is connected with a drainage pipe, and a filter assembly is arranged inside the box body movably, and the inner wall of the box body is equipped with a limit component which provides guidance for the movement of the filter assembly; the filter assembly includes several concentrically arranged annular plates, and two adjacent groups of annular plates are connected by a netting. The bottom of the annular plate is equipped with a chemical dosing component, and the inner side of the innermost annular plate is equipped with an adapter sleeve.

A composition for stabilizing iron compounds in an aqueous environment, includes a polycarboxylic acid or its salt(s), at least one monomeric or polymeric phosphonate including at least one phosphonic acid group, or its salt(s), at least one corrosion inhibitor including amino groups, and 1-15 weight-% of polycitric acid or a copolymer of citric acid with polyols or glycerol, calculated as an active ingredient from a total weight of constituents in the composition, as dry.