The disclosure belongs to the field of sewage treatment technology, in particular to a low-carbon nitrogen and phosphorus removal system and process for sewage treatment. The system of the disclosure includes a primary sedimentation fermentation tank, a mainstream modified A.sup.2O unit and a bypass anammox unit. The disclosure sets a denitrification phosphorus removal functional zone in the anoxic tank of the A.sup.2O system, and sets a deoxygenation zone in the aerobic tank. Combined with the primary sedimentation fermentation tank, the efficient utilization of the carbon source of the A.sup.2O process is strengthened. The system has good effluent quality and does not require the addition of a carbon source, and the aeration energy consumption is low, which achieves efficient and low-carbon nitrogen and phosphorus removal.

A management method of a system for producing an ultrapure water, the system including a boron removal tower including an accommodation space through which water to be processed passes and a boron adsorption resin filling the accommodation space of the boron removal tower, and the boron removal tower including a plurality of sample ports through which a plurality of sample waters to be processed passing through portions having different heights of the boron adsorption resin, are respectively discharged, and determining a replacement cycle of the boron adsorption resin by increasing a passing flow rate of the boron removal tower.

An ultrapure water (UPW) production facility includes a polisher filled with an ion exchange resin, an inflow line, an inflow valve connected to the inflow line and upstream of the polisher, an outflow line, an outflow valve connected to the outflow line and downstream of the polisher, a first drain line connected to the polisher, a first drain valve connected to the first drain line and downstream of the polisher, a second drain line branched from the outflow line, a second drain valve connected to the second drain line, a discharge line branched from the second drain line, a discharge valve connected to the discharge line, wherein the inflow valve, the outflow valve, the first drain valve, the second drain valve, and the outflow valve are automatic valves.

A water recycling system includes a tank configured to hold a washing liquid, a washing operation in fluid communication with the tank, wherein the washing operation utilizes the washing liquid, a filtering assembly positioned between the tank and the washing operation configured to filter particulate matter from the washing liquid, a supply line connected to the tank and configured to supply fresh water to the tank, a supply line meter associated with the supply line, the supply line meter configured to measure a volume of water through the supply line to the tank, and a throughput meter associated with the washing operation, the throughput meter configured to measure a volume of the washing liquid into or out of the washing operation.

An efficient and low-cost process for gravity thickening and fermentation of waste activated sludge withdrawn from the surface of an activated sludge aeration basin for use with treatment systems designed for “enhanced biological phosphorus removal” (EBPR). One or more reactor tanks are used for the process with the steps of: A fill cycle, in which the waste mixed liquor flows into the tank, followed by a settle cycle, in which the mixed liquor is allowed to settle for a period of time, followed by a decant cycle, in which the clear liquid is withdrawn. The withdrawal of a volume of the settling mixed liquor for discharge is then followed by a ferment period for the remaining settled mixed liquor solids and a transfer of the fermented mixed liquor solids back to the activated sludge liquid stream process.

There is provided a method of hydrothermal carbonization of a sludge from a wastewater treatment plant, comprising the steps of: preheating the sludge with at least one first steam fraction to obtain a preheated sludge; further heating the preheated sludge with a second steam fraction to obtain a heated sludge; subjecting the heated sludge to hydrothermal carbonization (HTC) in a reactor to obtain a HTC-treated slurry; mixing the HTC-treated slurry with an oxidizing agent, such as oxygen gas, to obtain a wet-oxidized slurry; subjecting the wet-oxidized slurry to flashing to obtain the second steam fraction and a pre-cooled slurry; subjecting the pre-cooled slurry to flashing in at least one step to obtain the at least one first steam fraction and a cooled slurry; separating the cooled slurry into a liquid fraction and a solids fraction; and routing the liquid fraction to the wastewater treatment plant for further treatment, wherein the second steam fraction is used for heating preheated sludge to the temperature of the HTC reaction. A corresponding system is also provided.

An industrial wastewater and hydrocarbon treatment system including of a plurality of reactors and treatment modules that allows the application of principles of chemistry and quantum physics, dissociating electrons from the atoms or chemical elements contained in the hydrocarbon contaminated water. This invention advantageously allows the separation of water and oil in an efficient way, through the use of electromagnetic pulses with low amperage, and a series of filters.

Systems and methods to enhance the removal of inorganic contaminants, including metals, from hydrocarbon feedstocks at a refinery. One or more embodiments of such systems and methods may be used to provide a renewable hydrocarbon feedstock having a reduced amount of metal contaminants. The reduction of metal contaminants in the renewable hydrocarbon feedstock mitigates catalyst fouling and/or deactivation during downstream refinery processing of the renewable hydrocarbon feedstock.

An apparatus for preparing and dispensing a flocculant solution to dewatering an aqueous process stream includes a mixing pump, a maturing tank, and a feeding unit. The mixing pump mixes the flocculant solution and builds up a pressure onto the flocculant solution. The maturing pressure tank is fluidly connected with the mixing pump, so that the pressurized diluted flocculant solution is led from the mixing pump into the maturing pressure tank and matured therein under pressure that is above atmosphere pressure.

A chemical-agent dosing apparatus for dosing a heating system with chemical agent. The apparatus comprises a chemical-agent storage chamber which stores a chemical agent and a dosing device which has a dosing chamber and a driving means. The dosing chamber is fluidly connected with the storage chamber and defines a dosing volume for receiving a dose of chemical agent. The driving means drives fluid from the dosing chamber via the dose outlet.