Provided is a non-point pollutant source treatment apparatus. The non-point pollutant source treatment apparatus includes an inlet pipe for allowing initial polluted rain (raw) water to flow therethrough, a settling tank coupled to the inlet pipe and storing raw water flowing from the inlet pipe, a drain part disposed at one side of an inside of the settling tank directly under the inlet pipe, and coupled to a drain pipe so as to discharge raw water contained in the settling tank into the outlet pipe, a purifying member disposed at the other side of the settling tank and including purifying plates with inlet holes, a filtering part coupled to an upper portion of the settling tank and filtering foreign substances from raw water, and a backwashing tank coupled to an upper portion of the filtering part and including a purified water pipe.

A transportable multi-chamber water filtration system useable at construction sites with sources of contaminated water is disclosed. The transportable multi-chamber water filtration system removes sediment and contaminants from contaminated water by combined processes of gravitational settling, filtration and coagulation of sediment by the use of flocculants. The system provides efficient removal of sediment and contaminants from the water around various sized sites.

A transportable multi-chamber water filtration system useable at construction sites with sources of contaminated water is disclosed. The transportable multi-chamber water filtration system removes sediment and contaminants from contaminated water by combined processes of gravitational settling, filtration and coagulation of sediment by the use of flocculants. The system provides efficient removal of sediment and contaminants from the water around various sized sites.

Some implementations can include method and system to collect and remove micro plastics from a water environment or ecosystem.

Some implementations can include method and system to collect and remove micro plastics from a water environment or ecosystem.

Provided is a kaolin having a finer particle size and a narrower particle size distribution, in combination with suitable morphology. Also provided are a method of preparing the kaolin product and methods of use.

The present invention is a CO.sub.2 based hydrometallurgical multistage reaction and separation system comprising: a pre-washing device configured to fully mix the feedstock, such as industrial solid waste, mineral and mine tailings with auxiliary reagents and water at specific ratio, a reactor configured to treat the washed slurry with CO.sub.2 bubbling and discharge the treated slurry to the next stage, multistage separators configured to separate solid particles from treated slurry and recycle the unreacted solids back into the pre-washing device, a by-product preparation device configured to generate calcium and magnesium based products from filtrate containing target elements, a water recirculating device configured to recycle the remaining liquor back to the system. The present invention ensures the whole system is able to continuously and consistently react at maximum capacity through continuous slurry feeding and CO.sub.2 bubbling into the reactors which also enables multistage circulating reaction.

Methods and apparatus for liquid/solid separation for use in applications such as dewatering fine particulate solids, and recovery of valuable metals from ore in a leaching process are provided. One application relates to methods of agitation leaching of metals such as gold from gold-bearing feedstock. A slurry is formed in a tank by agitation, and allowed to settle. A filter bed forms to drain the liquid from the tank, and a vertical screen pipe such as a well point addresses the formation of an impervious film on the upper surface of the filter bed.

Methods and apparatus for liquid/solid separation for use in applications such as dewatering fine particulate solids, and recovery of valuable metals from ore in a leaching process are provided. One application relates to methods of agitation leaching of metals such as gold from gold-bearing feedstock. A slurry is formed in a tank by agitation, and allowed to settle. A filter bed forms to drain the liquid from the tank, and a vertical screen pipe such as a well point addresses the formation of an impervious film on the upper surface of the filter bed.

A filtration system for a fuel system for a marine vessel engine. The system comprising: an inlet for fluid connection to a settling tank; an outlet for fluid connection to a service tank; and an arrangement of plural primary filtration devices The arrangement is fluidly connected between the inlet and outlet so that fuel flowing from the settling tank via the inlet to the service tank via the outlet passes through at least one of the primary filtration devices. The system is configured so that each respective primary filtration device operates, independently of each other primary filtration device in: a first mode, in which the fuel flows in a first direction through a filter of the respective primary filtration device to remove contaminants from the fuel, or a second mode, in which a fluid flows through the filter in a second direction, opposite the first direction, to dislodge the contaminants.