A household water purifier includes a main unit and a filter assembly arranged in the main unit. The filter assembly includes a composite filter core. The composite filter core includes a filter bottle and a filter element located in the filter bottle. The filter element is of a separated structure. In the household water purifier, the filter element is located in the filer bottle; during use, when the filter element needs to be replaced, the filter element can be directly taken out of the filter bottle for replacement; Furthermore, the filter element itself is of a split structure. It is no need to replace the filter element as a whole, just some failed components of the filter element need to be replaced, which further improves convenience of replacement and maintenance of the filter core of the water purifier, and saves maintenance and use costs of the water purifier.

Disclosed is a water treatment apparatus which can extract clean water by means of the pressure of raw water. The disclosed water treatment apparatus comprises: a filter part which filters raw water; a storage part which stores clean water filtered by passing through at least a part of the filter part, the storage part having a first chamber and a second chamber of which the volume changes according to a change in the volume of the first chamber; an extraction part which is installed so as to provide the filtered clean water to a user; and an air supply part which is installed on a flow path connected to the storage part in order to supply air to either one of the first chamber or the second chamber of the storage part.

Disclosed is a water treatment apparatus which can extract clean water by means of the pressure of raw water. The disclosed water treatment apparatus comprises: a filter part which filters raw water; a storage part which stores clean water filtered by passing through at least a part of the filter part, the storage part having a first chamber and a second chamber of which the volume changes according to a change in the volume of the first chamber; an extraction part which is installed so as to provide the filtered clean water to a user; and an air supply part which is installed on a flow path connected to the storage part in order to supply air to either one of the first chamber or the second chamber of the storage part.

Algae harvesting and cultivating systems and methods for producing high concentrations of algae product with minimal energy. In an embodiment, a dead-end filtration system and method includes at least one tank and a plurality hollow fiber membranes positioned in the at least one tank. An algae medium is pulled through the hollow fiber membranes such that a retentate and a permeate are produced.

Systems, devices, and techniques described herein relate to iron-based desalination of water. In some cases, an inflow of water including chlorine and sodium can be received. A plurality of iron nanoparticles may capture the chlorine and the sodium. The iron nanoparticles may at least partially include Zero Valent Iron (ZVI). An outflow of the water may be emitted. The chlorine and the sodium may be omitted from the outflow.

The present application provides a water treatment method, a water treatment device, and a slime inhibitor for membranes that are capable of, in water treatment using a separation membrane and a reverse osmosis membrane in the subsequent stage, inhibiting the generation of a slime both in the separation membrane and in the reverse osmosis membrane by a simple method. The water treatment method includes adding an iodine-based oxidizer to water to be treated, subjecting the water to be treated obtained during the adding of the iodine-based oxidizer to filtration with the separation membrane, and causing filtrated water obtained during the filtration to be separated with the reverse osmosis membrane into permeated water and concentrated water.

The present disclosure pertains to filtration methods comprising: passing a first fluid that comprises cells, cell debris and targeted product produced by the cells through a first filter thereby separating the first fluid into a first retentate comprising cells and a first permeate comprising targeted product and cell debris; combining resin beads having affinity for targeted product with the first permeate to form a second fluid containing resin beads with bound target product and cell debris; passing the second fluid through a second filter thereby separating the second fluid into a second retentate comprising resin beads with bound target product and a second permeate comprising cell debris; combining an elution buffer with the second retentate to form a third fluid that comprises a mixture of resin beads and unbound targeted product; and passing the third fluid through a third filter thereby separating resin beads from targeted product.

The present disclosure pertains to filtration methods comprising: passing a first fluid that comprises cells, cell debris and targeted product produced by the cells through a first filter thereby separating the first fluid into a first retentate comprising cells and a first permeate comprising targeted product and cell debris; combining resin beads having affinity for targeted product with the first permeate to form a second fluid containing resin beads with bound target product and cell debris; passing the second fluid through a second filter thereby separating the second fluid into a second retentate comprising resin beads with bound target product and a second permeate comprising cell debris; combining an elution buffer with the second retentate to form a third fluid that comprises a mixture of resin beads and unbound targeted product; and passing the third fluid through a third filter thereby separating resin beads from targeted product.

Apparatuses and methods for extracting desired chemical species including, without limitation, lithium, specific lithium species, and/or other chemical compounds from input flows in a modular unit. The input flows may be raw materials in which lithium metal and/or lithium species are dissolved and/or extracted. The apparatuses and methods may include daisy chain flow through separate tanks, a column array, and combinations thereof.

The present invention relates in part to a filter comprising a tubular housing having a proximal end, a distal end and a housing lumen therethrough; a tubular membrane having a proximal end, a distal end and a membrane lumen therethrough, wherein the tubular membrane is positioned within the housing lumen; a contaminated fluid sample inlet fluidly connected to the proximal end of the membrane, and a contaminated fluid sample outlet fluidly connected to the distal end of the membrane, thereby creating a sample flow-path from the sample inlet through the membrane lumen to the sample outlet; and a purification material inlet fluidly connected to a distal region of the housing lumen, and a purification material outlet fluidly connected to a proximal region of the housing lumen, thereby creating a purification material flow-path from the purification material inlet through the housing lumen to the purification material outlet; wherein the direction of the sample flow-path is in the opposite direction of the purification material flow-path. The invention also relates a method of purifying a contaminated fluid using said filter.