Water Remediation and Biosolids Collection System and Associated Methods
a biosolids collection and biosolids technology, applied in water cleaning, water/sewage treatment by oxidation, water cleaning, etc., can solve the problems of large increase in nutrient removal per unit area, inability to meet the mammoth flow requirements of lake-scale applications, and the scale of traditionally manufactured process components is far too small. , to achieve the effect of reducing the cost of building a very large vessel, avoiding wildlife exposure, and increasing nutrient removal
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embodiment 10
[0038]A DAF vessel 10 of the present invention has the following components: inflow zone, flotation cell zone, flotation collection zone, and outflow zone. Settlable solids drop to the bottom, and a collection system or underdrain piping periodically removes them. In a preferred embodiment 10, solids float to the surface and are removed onto a ramp, also called a beach 16, via chain and flyght scrapers or other methods. Typically 0.5 to 7 gpm flow per square foot of flotation zone can be used for sizing of filters depending on many variables. A preferred minimum depth is 12 in., and the depth can exceed 12 ft.
[0039]An important element of this flotation process is carefully crafted air micro-bubbles in solution. The generation of micro-bubbles can be accomplished with an air saturation tank, liquid high-pressure pump, and an air compressor in a system, which allows a clean side stream 17 of micro-bubble water to be held under pressure, for a period of time, so that when the pressure...
embodiment 140
[0063]The floating material 150 in this embodiment 140 is collected with the use of a movable rake 153 that skims across the water surface 151 and pushes the floating material 150 into a gutter 154. The collected floating material 150 can then be pumped 155 from the gutter 154.
[0064]Baffles can be made from the same membrane as the basin. Membrane material such as HDPE landfill liner, polyethylene, and a wide variety of synthetic rubber liners can be used, although this is not intended as a limitation. A geotextile drainage system 11 is also employed to allow removal of water from under the DAF liner 27. This allows for predictable performance for the lined earthen basin 19 against ground water and gas discharge, which could displace the liner 27.
[0065]An alternative embodiment of a DAF system130 (FIG. 4) contains no inflow basin, and, rather than having an outflow weir with a space therebeneath as in FIGS. 1 and 2, the outflow channel comprises a pipe 131 extending through a constr...
embodiment 210
[0076]The entrapment element 220 causes suspended and dissolved solids to coalesce and form either a floating mass or a settled mass, depending upon the system conditions. In the embodiment 210 shown in FIG. 14, floating solids 223 move toward the outlet end 224 of the vessel 211, where they are collected in a ramp 226, or by other means, and then extracted to another location, on or off the vessel 211. Cleansed water beneath the floating solids 223 flows out an outlet 227 at the outlet end 224.
[0077]In the embodiment 210′ shown in FIG. 15, settled solids 223′ move toward a settling zone 228 at the bottom 229 of the vessel 211, from where they are extracted. This embodiment 210′ can includes a floating curtain 230 as a cover. It will be understood by one of skill in the art that a combination of these embodiments 210,210′ could also be envisioned.
[0078]It will also be understood by one of skill in the art that an additional unit such as a DAF could be added to these systems 180,210 ...
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Abstract
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