Abstract: The present invention relates to a compound capable of lowering the flammability of a non-aqueous electrolyte when included in the non-aqueous electrolyte and improving the life properties of a battery by forming an electrode-electrolyte interface which is stable at high temperatures and low in resistance, and relates to a compound represented by Formula I descried herein, a non-aqueous electrolyte solution and a lithium secondary battery both including the compound, n, m, Ak, and X are described herein.

Abstract: Disclosed is a submerged-type compact filtration apparatus of minimized footprint which can be installed easily, maintained safely and conveniently, and operated with substantially reduced energy. The submerged-type filtration apparatus of the invention comprises a filtration bath disposed over a ground; a filtration membrane cassette configured to be installed in the filtration bath; and a first guide disposed in the filtration bath and configured to guide the filtration membrane cassette when the filtration membrane cassette is inserted into the filtration bath so as to be installed therein.

Abstract: An energy-saving filtering system and a hollow fiber membrane module for the same are disclosed. According to the filtering system of the present invention, pretreated feed water flows into the case of the hollow fiber membrane module by gravity, and the filtrate passing through the hollow fiber membrane is discharged from the hollow fiber membrane module by gravity.

Abstract: Disclosed are system and method for filtration capable of minimizing the damage of a filtration membrane module, reducing the energy consumption, and improving the filtration efficiency. The filtration method of the invention comprises performing a preliminary filtration of a feed water with first and second submerged-type filtration membrane modules; pressurizing an initial filtrate produced through the preliminary filtration with a pressure higher than an osmotic pressure of the feed water; filtering the pressurized initial filtrate with a reverse osmosis membrane module; interrupting the first submerged-type filtration membrane module performing the preliminary filtration; and backwashing the first submerged-type filtration membrane module caused to stop performing the preliminary filtration, wherein the preliminary filtration with the second submerged-type filtration membrane module is continuously performed while the first submerged-type filtration membrane module is backwashed.

Abstract: An energy-saving filtering system and a hollow fiber membrane module for the same are disclosed. According to the filtering system of the present invention, pretreated feed water flows into the case of the hollow fiber membrane module by gravity, and the filtrate passing through the hollow fiber membrane is discharged from the hollow fiber membrane module by gravity.

Abstract: Disclosed is a submerged-type compact filtration apparatus of minimized footprint which can be installed easily, maintained safely and conveniently, and operated with substantially reduced energy. The submerged-type filtration apparatus of the invention comprises a filtration bath disposed over a ground; a filtration membrane cassette configured to be installed in the filtration bath; and a first guide disposed in the filtration bath and configured to guide the filtration membrane cassette when the filtration membrane cassette is inserted into the filtration bath so as to be installed therein.

Abstract: Disclosed are system and method for filtration capable of minimizing the damage of a filtration membrane module, reducing the energy consumption, and improving the filtration efficiency. The filtration method of the invention comprises performing a preliminary filtration of a feed water with first and second submerged-type filtration membrane modules; pressurizing an initial filtrate produced through the preliminary filtration with a pressure higher than an osmotic pressure of the feed water; filtering the pressurized initial filtrate with a reverse osmosis membrane module; interrupting the first submerged-type filtration membrane module performing the preliminary filtration; and backwashing the first submerged-type filtration membrane module caused to stop performing the preliminary filtration, wherein the preliminary filtration with the second submerged-type filtration membrane module is continuously performed while the first submerged-type filtration membrane module is backwashed.

Abstract: Disclosed is an energy-saving and eco-friendly filtration system which is capable of minimizing the amount of the energy required for the filtration, thereby remarkably reducing the cost of water treatment. The filtration system of the present invention comprises: a feed water tank for storing a feed water to be treated; a hollow fiber membrane module for filtering the feed water supplied from the feed water tank; and a filtrate tank for storing a filtrate produced by the hollow fiber membrane module, wherein the hollow fiber membrane module comprises a plurality of hollow fiber membranes for filtering the feed water, and the sum of head pressure of the feed water in the feed water tank and water pressure of the filtrate in accordance with siphon principle is higher than the threshold membrane pressure of the hollow fiber membranes.