An industrial waste water treatment system is provided. The industrial waste water treatment system includes: a buffer tank that temporarily receives and stores industrial estate waste water; a primary treatment unit that performs a primary treatment on effluent water from a buffer tank; an activated sludge treatment apparatus that is a secondary treatment unit that performs a secondary treatment using activated sludge on influent water that has been treated by the primary treatment unit; an organic matter concentration measurement unit that measures an organic matter concentration in the industrial estate waste water flowing into the buffer tank; and an activator dispensing unit that dispenses, into the secondary treatment unit, an activator that activates microorganisms included in the activated sludge of the activated sludge treatment apparatus.

A regeneration method for a filtration apparatus, a filtration apparatus, and a water treatment apparatus are disclosed that shorten a time required until stabilization of water quality of filtrate after backwashing, and stably provide filtrate satisfying a desired water quality standard. The regeneration method for a filtration apparatus according to the invention is a regeneration method for a filtration apparatus that has a filter layer formed by filling a solid filter material formed with a protrusion on a surface, and passes water to be treated containing suspended matters through the filter layer to perform filtration of the suspended matters. The regeneration method for a filtration apparatus includes a step of backwashing the filter layer by passing washing liquid through the filter layer in a direction opposite to a passing direction of the water to be treated such that the protrusion is retained on the surface of the solid filter material.

A fresh water generation method by which product water satisfying target water quality can be stably and efficiently obtained even when raw water quality fluctuates, is provided by branching at least a part of a water flow line through which raw water 1 flows into a plurality of branch lines including a branch line A1 and a branch line A2 and differentiating retention times from branching to joining together between the branch line A1 and the branch line A2, in a fresh water generation method for obtaining product water by treating raw water 1.

A desalination system (100) having an intake unit (110) providing seawater to a pre-treatment unit (120) connected to a reverse osmosis (RO) desalination unit (130) and a post treatment unit (150). The desalination system (100) is configured to operate without any external addition of chemicals to simplify logistics and regulation concerns. The units of the system are configured to prevent biofouling, scaling and corrosion by mechanical and biological means including high flow speeds, biological flocculation of colloids, and making the water entering the RO units inhospitable to bacteria and other organisms that cause biofouling, hence preventing their settlement and removing them with the brine. Recovery rate is lowered and energy is recovered to increase the energetic efficiency and minerals that are added to the product water are taken from the brine.

The present invention relates to filtration of liquids, such as water, containing substances that desirably should be removed from the liquids. The invention relates in particular to a filtration cake, being produced in situ of a cleaning system from substances that desirably should be filtered away. Particular preferred embodiments of the present invention relate to treatment of waste water, where an activated sludge is provided, which sludge contains activated sludge flocs. These flocs are accumulated on a fluid penetrable support structure to form a layer of flocs, which subsequently is compressed to form a filter of desired properties. The invention also relates to adapting waste wateror other liquids containing biodegradable substancesto optimized biodegradation and filtration by deflocculating flocs in an activated sludge during or before a biodegradation step and subsequently promoting re-flocculation prior to filtering or other means of biomass separation.

A diaphragm valve with an assembly or cartridge that facilitates replacement of the diaphragm, the valve seat or both. The assembly may be a valve assembly having a diaphragm, a seat carrier and a valve seat that are combined into a discrete subassembly or cartridge for a diaphragm valve. The assembly as a discrete cartridge can be easily removed and replaced in order to change out the diaphragm or the valve seat or both. In one embodiment, the diaphragm has a perimeter that is welded to one side of the seat carrier. Flow capacity is favored by providing a gap between a seat carrier and a flow port of the valve body where the gap in part defines a flow area that is the same or greater than the flow area of the flow port. Methods for installing and replacing a valve assembly into a valve body are also disclosed.

The present invention relates to a method of determining the total organic carbon content (TOC) of a purified water stream in a water purification apparatus having at least a first pump, a first conductivity sensor, an oxidiser, and an oxidiser recirculation circuit having a dedicated second pump, the method comprising at least the steps of: (a) using the first pump to pass a water supply stream through the water purification apparatus, including through the first conductivity sensor and the oxidiser, to provide a purified water stream available for dispense; (b) using the first conductivity sensor to measure a first conductivity value of the water supply stream prior to the oxidiser; (c) stopping the first pump; (d) using the second pump in the oxidiser recirculation circuit to recirculate the water in the oxidiser only through the first conductivity sensor and the oxidiser a plurality of times, (e) using the first conductivity sensor to measure a second conductivity value of the recirculated water; and (f) calculating the TOC of the water in the oxidiser prior to step (d), from the first and second conductivity values.

The present invention relates to a fresh water generation method using a water treatment apparatus, the method including feeding water to be treated into a membrane element including a reverse osmosis membrane or a nanofiltration membrane to separate into concentrate and permeate, in which the method includes, under operation of the apparatus, adjusting a concentrate flow rate and/or a permeate flow rate based on a water quality index of the water to be treated and a water quality index of combined water prepared by combining the concentrate and the permeate at a ratio based on a predetermined permeate recovery rate, so that the water quality index of the water to be treated falls within a tolerance on the water quality index of the combined water.

A computer-implemented method includes controlling an instrument to measure a fluorescence emission spectrum of a sample including a first peak emission wavelength and at least a second peak emission wavelength, emitted in response to an excitation wavelength and controlling the instrument to measure an absorbance obtained at the excitation wavelength of the sample. The method may include determining, using the computer, a ratio of the measurements at either the second peak emission wavelength, or a sum of measurements at a plurality of peak emission wavelengths including at least the first peak emission wavelength and the second peak emission wavelength, to the first peak emission wavelength, and calculating, using the computer, a value for a quality parameter based on a combination of at least the ratio and the absorbance measurement. The method may include controlling an associated process based on the quality parameter.

A system and method are provided for a food loading station having a disposer that grinds food waste that is located at a facility that processes food waste. A storage tank receives a slurry of food waste and water from the disposer. A controller is connected to the disposer and in communication with a scale that senses a weight of the food waste before grinding by the disposer. A remote module is in communication with the controller, receives the sensed weight of the food waste, and calculates, based on the sensed weight, a total amount of the food waste ground by the disposer and received by the storage tank over a predetermined time period. A terminal associated with the facility and connected to the remote module receives a report that includes diverted food waste data for the predetermined time period corresponding to the total amount of food waste.