The present invention relates to a fresh water generation method including: feeding raw water or pretreated water thereof as feed water into a semipermeable membrane module in a pressurized state using a booster pump, thereby separating the feed water into a concentrate and a permeate having a low concentration, in which a scale inhibitor having a reducing function is dosed intermittently or continuously upstream from the semipermeable membrane module, thereby inhibiting scale generation and maintaining an oxidation-reduction potential of at least either the feed water or the concentrate to a threshold value or lower.

The present invention relates to methods for preventing and/or reducing biofilm formation and/or planktonic proliferation with one or more selected bacteria strains or bacterial blends.

An equipment for disposal of cyanobacteria in stagnant waters has a float structure, to which two types of bipolar electrodes (1 and 6) are mounted under the surface of water, interconnected and supplied with electric direct current via an alternator (10). The equipment comprises a supporting float (5) having the shape of a hollow body, in which there is a transversely positioned rib (4) with an attached suspended electrode (1), interconnected to supplies of photovoltaic cells (8) and alternator (10), fixed on the rib (4) there is the device (9) for utilizing wind power, connected to an alternator (10), driving the water pump (2), which is placed in the delivery pipe (3) and is connected directly to the axis of the device (9), for utilization of wind power. Fixed on the supporting float (5) there is the upper float (7) with the anchored grid electrode (6) and with the stored photovoltaic cells (8), interconnected with the electrodes (1) and (6). The delivery pipe (3) is connected to the water pump (2), and the outlet of the delivery pipe (3) is positioned directly above the suspended electrode (1). The upper float (7) copies the shape of the supporting float (5) and is made of a dielectric, light, floating material. The method of disposal of cyanobacteria in stagnant waters is based on quatrolytic disposal of cyanobacteria by the electroflotation method, by means of the above-mentioned equipment.

A water treatment system including an enclosure for water to be treated, a multiplicity of biomass carriers located within the enclosure, at least one airlift in the enclosure for raising the water and the biomass carriers and at least one mechanical biomass carrier accumulated residue removal apparatus operative to remove accumulated residue from the biomass carriers.

Provided is a fresh water generation system which filters biotreated water produced by microbiologically treating waste water via a primary semi-permeable membrane (8), and then mixes concentrated water rejected by the filtration with seawater, thereby to filter the mixed water via a secondary semi-permeable membrane (14). This system enables frequencies of chemical cleaning and replacement of the secondary semi-permeable membrane to be reduced. The fresh water generation system comprises: a primary semi-permeable membrane apparatus (9) which separates microorganism treating waste water into permeated water and concentrated water; a secondary semi-permeable membrane apparatus (13) which filters mixed water prepared by mixing the concentrated water into seawater. In the fresh water generation system, the primary semi-permeable membrane (8) has an equal to or a higher microorganism adhesive property than the secondary semi-permeable membrane (14).

A method for controlling the growth of blue algae in a basin relates to the field of the restoration and protection of the natural ecology on the earth's surface. An ecological water treatment system was constructed for the basin with microorganisms, plants, animals, fillers and the like as main elements by building a novel ecological slope protection at the land-lake ecozone along the banks of the basin and planting eucalyptus in the basin water and/or on the bank of the basin, thereby effectively realizing the efficient nitrogen and phosphorus removal from the basin, controlling the spread of blue algae and improving the environmental water quality.

A method for wastewater treatment having a zero discharge of sludge, the method including: a) providing a membrane bioreactor system including a membrane separation system and a reaction vessel; and b) aerating the membrane separation system and the reaction vessel to control the dissolved oxygen concentration around the membrane separation system to be greater than 0 and smaller than 2 mg/L and the dissolved oxygen concentration in the reaction vessel excluding the membrane separation system to be greater than 0 and smaller than 1 mg/L. A wastewater treatment system having a zero discharge of sludge includes a membrane bioreactor system including: a reaction vessel, a membrane separation system, a water production system, and an aeration system.

A water injection process plant includes a catalytic deoxygenation unit located subsea that makes use of a reducing agent sent from topsides in liquid form. The catalyst is preferably a palladium catalyst or its equivalent. The reducing agent is an oxygen scavenger such as but not limited to hydrazine, carbohydrazide, sodium erythorbate, methyl ethyl ketoxime (“MEKO”), hydroquinone, diethylhydroxylamine (“DEHA”), formic acid (methanoic acid). A chemical umbilical can be used to deliver the reducing agent to a mixer located upstream of the deoxygenation unit, where the agent is mixed with seawater containing oxygen.

A method for degrading organic fractions in cooling circuits in industrial plants, in particular plants in the metallurgical industry, including the following steps: adding bacteria to the cooling circuit, wherein the bacteria are suitable for degrading the organic fractions in the cooling circuit, and disinfecting the aerosol generated in a cooling tower of the cooling circuit. A cooling circuit for an industrial plant is also disclosed.

A disinfection system includes an ozone water generator and a top seat. A base of the top seat has a top seat entrance and a top seat exit. A middle portion of an underside of the base is formed with an opening having a top seat inlet and a top seat outlet to communicate with the top seat entrance and the top seat exit. A power interface is provided on an outer cover of the top seat. Generator claws are interlocked with top seat claws. A generator mouth at a middle portion of the upper end of the ozone water generator is inserted into the opening. The generator mouth is formed with a generator inlet and a generator outlet to communicate with the top seat inlet and the top seat outlet. An anode and a cathode of the ozone water generator are movably connected to the generator control board through wires. The disinfection system is able to avoid unnecessary waste and improve convenience of use.