The invention is in the field of organic sludge digestion from various sources, such as manure, sludge from a wastewater treatment plant, and an organic fraction of dredging sludge. The present method provides advanced control for serially treating aqueous organic sludge by anaerobic digestion. It further relates to dewatering of the obtained biomass.

Disclosed herein is a method for remediating sewage that contains persistent contaminants. The method comprises ozofractionating the sewage under conditions whereby a foam fractionate comprising persistent contaminants is produced and separated from an ozofractionated wastewater, quiescing the ozofractionated wastewater, whereby a residual ozone content of the ozofractionated wastewater is reduced, and contacting the quiesced ozofractionated wastewater with a microorganism population under conditions effective to biologically remediate the ozofractionated wastewater.

Disclosed is a water softening system including a first filter unit and a second filter unit that selectively performs a removal mode of discharging soft water that contains a smaller amount of an ionic material than source water or a recycling mode of discharging reclaimed water that contains a larger amount of the ionic material than the source water.

A method for treating domestic sewage includes: preliminarily treating the domestic sewage through a grating and a grit chamber, so as to remove large-particle solids in the domestic sewage; and subjecting the domestic sewage after the preliminary treatment to circulating anaerobic-oxic treatment in a membrane bioreactor (MBR). In the oxic treatment process, microorganisms oxidize nitrogen in the sewage into nitrite or nitrate. Under anaerobic conditions, denitrifying bacteria in the microorganisms reduce the nitrate, releasing molecular nitrogen or nitrous oxide. In the present invention, the MBR is filled with a quinone-based hollow fiber membrane. During the microbial denitrification, the quinone acts as an electron transfer carrier to participate in the denitrification to promote the reduction of the nitrate (nitrite), increasing the denitrification rate under anaerobic conditions, and achieving the purpose of efficient denitrification.

A water generation system for a vehicle comprises: a first container to collect liquid water generated from the condensation of water vapor; a filter to filter the liquid water, the filter in fluid flow communication with the first container; a second container to store the liquid water that the filter filtered, the second container (i) in fluid flow communication with the filter and (ii) configured to hold a larger volume of the liquid water than the first container; and a source of ultraviolet light that, when activated, emits the ultraviolet light into at least one of the first container and the second container. The water generation system can further comprise an agitator that is configured to agitate the liquid water disposed within either the first container or the second container, and a cooling element configured to withdraw heat from the liquid water within the water generation system.

A control apparatus for an artificial intelligence water purifier includes a storage device and a control unit. The storage device is configured to store discharge information that includes an amount of beverage discharged from the water purifier in a time slot of a predetermined period of time. The control unit is configured to analyze the discharge information, set the time slot in a power-saving schedule based on analysis of the discharge information, and control the water purifier to perform a power-saving operation based on determining that an operation time is within the time slot set in the power-saving schedule.

A method of sanitizing liquid for use in a. medical device, the method comprising the steps of providing a medical device defining a water circuit with a volume of liquid, sensing the temperature of the volume of liquid with a sensor, heating the volume of liquid from an initial temperature to exceed a threshold temperature, maintaining the volume of liquid above the threshold temperature, determining a time-temperature value for the volume of liquid periodically once the threshold temperature has been exceeded, calculating a. cumulative time-temperature value and providing an output signal once the cumulative time-temperature value has reached a level indicative of a sanitizing dose. A medical device and a liquid sanitizer are also disclosed.

A process for enriching phosphorus and recovering vivianite by a biofilm method includes the following steps: 1) an aerobic phosphorus absorption stage; 2) an anaerobic phosphorus release stage; 3) a cyclic enrichment stage; 4) a seed crystal forming stage; and 5) a crystal forming stage. Phosphorus is enriched by the biofilm method and recovered with vivianite as a recovery product, which solves the problem of phosphorus removal from municipal sewage and improves the economic value; by preparing high dissolved oxygen at the aerobic stage, a high-concentration phosphorus recovery solution can be obtained with a relatively low carbon-phosphorus ratio and relatively high enrichment times, and the consumption of carbon sources can be reduced; since the oxidation-reduction potential is controlled to be less than −100 mv by the biofilm method at the anaerobic phosphorus release stage, the oxidation-reduction potential does not need to be adjusted again during the recovery of vivianite,

The pure water manufacturing management system includes a pure water manufacturing device; an analysis device that inspects water quality; a first valve provided to first piping connected to the outlet side of the manufacturing device, the first valve controlling the amount of pure water supplied to a storage tank; second piping that branches from the first piping and is connected to the analysis device; and a control device, the control device controlling the analysis device during supply of the pure water to the storage tank, repeatedly performing water quality inspection of the pure water flowing in through the second piping, opening the first valve when, as a result of the water quality inspection, the water quality of the pure water satisfies a prescribed standard, and closing the first valve when the water quality of the pure water does not satisfy the prescribed standard.

A process for controlling the aeration rate during the aerobic phase of a wastewater treatment process is disclosed, which comprises: (a) measuring at moment t.sub.1 the ammonium concentration [NH.sub.4.sup.+].sub.1 and nitrogen oxide concentration [NO.sub.x].sub.1 in a mixture of wastewater and microbial sludge; (b) determining a nitrogen oxide target concentration [NO.sub.x].sup.F.sub.1 at the end of the aerobic phase based on at least the current ammonium concentration [NH.sub.4.sup.+].sub.1 and the current NO.sub.x concentration [NO.sub.x].sub.1; (c) determining a setpoint [NO.sub.x].sup.SP.sub.1 based on interpolation between [NO.sub.x].sub.1 and [NO.sub.x].sup.F.sub.1; (d) adjusting the aeration rate to minimise error between [NO.sub.x].sub.1 and [NO.sub.x].sup.SP.sub.1; and (e) repeating steps (a) to (d) at further moments t.sub.1. The invention further concerns a process for the treatment of wastewater, using the process.