A completely biological method for removing a first group of micropollutants of pharmaceutical origin and a second group of micropollutants of pharmaceutical origin from raw wastewater includes: providing a first buffer tank upstream of a bioreactor; providing a moving bed membrane bioreactor (MB-MBR) for developing biomass growth both on a fixed support and in suspension in a form of flocs, and on mobile supports, the bioreactor obtaining an effluent with a COD concentration of organic matter of less than 50 mg l.sup.−1 and a total nitrogen concentration of less than 15 mg l.sup.1; providing a biofiltration tank, separate from the first buffer tank of the bioreactor, that includes one or more biologically activated carbon (BAC) columns containing activated carbon; supplying the first buffer tank upstream of the bioreactor with raw wastewater containing micropollutants of pharmaceutical origin; pretreating the wastewater by passing the wastewater through a fine mesh sieve.

This invention relates to a composition comprising: (a) 10-20 wt % acidifying bacteria, (b) 30-40 wt % of an oxidising agent, (c) 5-15 wt % of an organic acid, and (d) 1-10 wt % of a chelating agent. The invention also relates to a method of removing uric acid from a waste pipe comprising the step of inserting the composition into the waste pipe.

The invention relates to a method for reducing emission of ammonia from a livestock housing. The method comprises applying a composition comprising a compound that restrains ammonia volatilization onto freshly excreted manure by an animal in the livestock housing. Because the compound is deposited onto freshly excreted manure, ammonia volatilization is tackled at the source, rather than at a later moment, e.g. in a manure pit, when contact of faeces and urine, and therefore the conversion of urea to ammonia under the influence of urease has already led to volatilization of ammonia.

The present invention aims to provide an activated carbon for adsorbing a molecular polar substance with excellent adsorption property to a molecular polar substance and regeneratability. The present invention provides an activated carbon for adsorbing a molecular polar substance obtained by an alkali activation method, wherein the activated carbon has an acidic functional group in an amount of 2.1 meq/g or more, a basic functional group in an amount of more than 0 to 0.6 meq/g, and a specific surface area of 1000 to 4000 m.sup.2/g.

A method for treating a wastewater or a wastewater sludge includes adding performic acid to the wastewater and/or the waster sludge as an odor controlling agent and/or corrosion controlling agent.

There is disclosed a system and process for the anaerobic and aerobic treatment of landfill wastewater, including landfill condensate, landfill leachate and mixtures thereof.

A combined water aeration and filtration unit (WAFU), having a tank with a vent section at a top of said WAFU and above an aeration section above a filtration section at a bottom of said WAFU. The vent section has one or more demisters and one or more vents for detraining water and providing a dry air exit from said WAFU. The air section has a water inlet ending in a spray nozzle near the top of the aeration section to turn incoming dirty water into water droplets and a forced air blower on a side or top of the aeration section for blowing air through said water droplets in rate sufficient to remove volatile organic compounds and precipitate manganese and iron. The aeration section also has one or more annular rings or partially annular baffles on an inside wall of the tank to force water from said inside wall into an interior of the tank. Thus, no water escapes aeration. A backwash collection trough and backwash water outlet are positioned above the filtration section for removing dirty backwash water from the unit. The filtration section has one or more filters therein and a drain and clean water outlet near its bottom for egress of clean water from said WAFU.

Disclosed is a pressostatic odor control cover for slurry treatment tank with a device for reducing the inner volume occupied by harmful and malodorous gases emitted from the surface of the slurry. The treatment tank is delimited by a base and by lateral containment walls. The cover includes: a gas impermeable flexible membrane; a gas-tight continuous fixing unit of a margin of the membrane to the tank; an insufflation unit of air inside the cover; and a discharge valve of the air out of the cover. The odor control cover also includes a diaphragm permeable to liquids and to gases, arranged to delimit a reduced volume of the odor control cover available to the harmful gases and to the malodorous substances released from the slurry. The air insufflation unit is connected to the cover above the diaphragm. The discharge valve is connected to the cover below the diaphragm.

A method of providing sustained odor control in an extended sewer line is disclosed. The method includes measuring at least one parameter of the sewer line including average wastewater volume, flow rate, and retention time and administering a blended composition which includes an immediate release compound and an extended release compound into the sewer line to control concentration of an odorous compound therein. A method of facilitating sustained odor control in an extended sewer line is also disclosed. The method includes providing the blended composition including the immediate release compound and the extended release compound and instructing a user to administer the blended composition to the sewer line control concentration of the odorous compound therein. A system for providing sustained odor control in the extended sewer line including sensors to measure sewer line parameters and a controller to instruct administration of the blended composition is also disclosed.

Disclosed herein is a structural drain trap for preventing spread of pathogens between floors, which has an improved structure in which it includes a cover and an outer chamber that are easily coupled to and decoupled from each other and provides a drain line configured to have a double structure at inner and outer portions thereof. Therefore, it is possible to prevent pathogens such as Coronavirus as well as odors or pests from flowing backward as much as possible, and thus to prevent pathogens from spreading through the gap between the floors of buildings such as apartments.