Water treatment structures may have at least a first geotextile fabric layer; a second geotextile fabric layer; a third geotextile fabric layer; a first filler layer with plastic particles, arranged between the first and second geotextile fabric layers; and a second filler layer with plastic particles, arranged between the second and third geotextile fabric layers, wherein the geotextile fabric layers and the filler layers are within a housing, and wherein the structure is configured such that contaminated water proceeds sequentially through the first geotextile fabric layer, the first filler layer, the second geotextile fabric layer, the second filler layer, and the third geotextile fabric layer. Methods of treating wastewater may involve passing wastewater, after optional oxygenating and pre-filtering, through such alternating layers of geotextile, preferably nonwoven, and polymer particles.

Water treatment structures may have at least a first geotextile fabric layer; a second geotextile fabric layer; a third geotextile fabric layer; a first filler layer with plastic particles, arranged between the first and second geotextile fabric layers; and a second filler layer with plastic particles, arranged between the second and third geotextile fabric layers, wherein the geotextile fabric layers and the filler layers are within a housing, and wherein the structure is configured such that contaminated water proceeds sequentially through the first geotextile fabric layer, the first filler layer, the second geotextile fabric layer, the second filler layer, and the third geotextile fabric layer. Methods of treating wastewater may involve passing wastewater, after optional oxygenating and pre-filtering, through such alternating layers of geotextile, preferably nonwoven, and polymer particles.

An ecological biowater purification system is provided, which includes a plurality water purification tanks connected to one another; each water purification tank includes a water inlet, a water outlet, a water purification device, a suction device, a first and a second backflow device. Particularly, the water purification device orderly includes a sedimentation pool, an anaerobic pool, an anoxic pool, a level-1 and a level-2 biological filter pool, which communicate with one another via baffle boards and communication holes; each suction device includes a plurality of suction nozzles and a suction pipe for discharging precipitates out of the water purification tank; the first backflow device is used to make some water in the level-2 biological filter pool flow back to the sedimentation pool, and the second backflow device is used to make some water in the level-1 and level-2 biological filter pool flow back to the anaerobic pool.

The present invention is an intermittent cycled biological filter. Liquid enters a filtration container through an inlet line and travels to the bottom of an internal cavity of the container, passing through any filtration media in the container. The liquid then exits through a siphon mechanism having external and internal siphon tubes connected to an internal cavity of the container. The liquid travels up external siphon tube, down internal siphon tube, and through an outlet line. A siphon break tube connected to the external siphon tube destroys the suction pulling the liquid up once the liquid level in the container drops below a certain level, allowing liquid to begin filling the container again. This allows intermittent wetting of the filtration media. In certain embodiments, multiple filtration containers may be connected in series and/or parallel to allow for a greater volume or level of filtration.

A gas supply body for use in a wastewater treatment apparatus for purifying wastewater using action of microorganisms in the wastewater, the gas supply body comprising: a gas delivery layer and a sheet laminate, wherein the sheet laminate comprises a base material that is a microporous membrane comprising a plurality of fine through holes penetrating therethrough in a thickness direction, and a gas-permeable non-porous layer, wherein the gas delivery layer, the base material, and the gas-permeable non-porous layer are arranged in this order, and wherein the base material has a pore size of 0.01 m to 50 m. A method for producing a bag for a gas supply body disposed in a wastewater treatment apparatus comprising a sheet laminate.

Three dimensional fabric media of the present invention are used with moving bed biofilm reactors, and are generally constructed of an open weave substrate that allows the diffusion of gas, nutrients and food, while protecting and serving as an attachment site for a variety of microbial colonies in both anoxic and aerobic zones. The media is preferably constructed of high-density polyester fiber and has a specific gravity of approximately 0.96.

The invention relates to a fixed bed for aerobic or anaerobic wastewater purification, comprising an upper frame having support elements fixed to opposite side rails and/or intermediate rails for attaching textile, foldable, non-degradable supports for microorganism, a lower frame having support elements for fixing the textile supports to the lower frame, and means connecting the frames at a corner region. The invention is a fixed bed where all parts of the fixed bed can be assembled to form a relatively small packaging unit that already contains the inserted textiles. Frames are provided with spacers at least in the corner regions, the height of which spacers corresponds to the material height of the folded supports between two frames and the supports are fixed by means of the supports members to the side rails and/or intermediate rails of the frames in a preassembly step before folding.

Apparatus for recovering spilled oil in water infested with floating ice or other debris comprises a fence having an upper rail and lower rail encircling an area to receive an oil skimmer. A plurality of buoyancy units maintain the fence at an appropriate water level. An ice-deflecting cone covers the bottom of the fence when the apparatus is deployed. A plurality of cables may be attached to the upper rail of the fence to raise and lower the apparatus into the water. The fence is preferably circular, with a diameter in the range of 10 to 50 feet. The fence preferably includes a plurality of spaced-apart vertical supports between the upper and lower rails to keep chunks of ice or other debris from entering into the encircled area, and the lower barrier structure is perforated, with openings in the range of less than an inch to several inches.

A water treatment unit has a support housing vertically extending between a support housing upper end and a support housing lower end. The support housing includes a pair of opposing primary housing walls and a pair of opposing secondary housing walls. Each of the secondary housing walls is formed separately from, and mechanically joined to, each of the primary housing walls. Each of the primary housing walls is perforated to allow airflow in a first direction laterally through a treatment cavity defined by the housing walls. A plurality of hangers extend in the first direction between the primary housing walls and are supported by the support housing. The hangers are mutually spaced between the secondary housing walls across the treatment cavity (23). A plurality of biotreatment membranes each carry a biomass culture and are draped over, and supported by, one of the hangers to define two opposing membrane walls each extending downwardly from the hanger.

Disclosed are floating micro-aeration unit (FMU) devices, systems and methods for biological sulfide removal from water/wastewater bodies and streams. In some aspects, a system includes a manifold structure including one or more opening to flow air out of an interior of the manifold structure; one or more support structures connected to the manifold structure, in which the one or more support structures are floatable on a surface of a fluid that includes water or a wastewater; and an air source that flows air to the manifold structure, such that the manifold structure supplies the air containing a predetermined amount of oxygen (e.g., less than 0.1 mg/L of oxygen) to oxidize sulfide of the fluid.