A method for enhancing biochemical water treatment by a powder carrier includes: (i) screening the powder carrier by removing impurities to obtain a screened powder carrier; (ii) dissolving the screened powder carrier by stirring to prepare a slurry, enabling the screened powder carrier to completely absorb moisture to obtain a soaked powder carrier slurry; (iii) adjusting the pH value and adding the soaked powder carrier slurry into a bioreactor or a biological reaction structure; (iv) distributing the soaked powder carrier slurry uniformly through a hydraulic agitation; (v) loading a microorganism on the inner pore and wrapping on the surface of the soaked powder carrier slurry to obtain powder-loaded biological floccules; (vi) settling the powder-loaded biological floccules in a sedimentation zone and separating the powder carrier from the microorganism for reuse.

The microorganism preparation feeding method of the invention employs an automatic microorganism preparation feeding apparatus which includes a cold storage apparatus for refrigeration-storing a seed microorganism belonging to the aerobic microorganism group including at least one species of aerobic microorganisms capable of decomposing oil and fat contained in oil/fat-including wastewater and a growth tank for growing the seed microorganism so as to produce the microorganism preparation, wherein the seed microorganism belonging to the aerobic microorganism group is maintained in a live state by means of the cold storage apparatus, the seed microorganism is periodically grown by means of the growth tank so as to produce a predetermined microorganism preparation, and the produced predetermined microorganism preparation is fed to the oil/fat-including wastewater. The method includes refrigeration-storing, as the seed microorganism, a microorganism whose population density is 1×10.sup.7 CFU/mL to 5×10.sup.9 CFU/mL in the cold storage apparatus; growing, as a source material, the seed microorganism of a predetermined volume by means of the growth tank so as to produce the predetermined microorganism preparation whose volume is 50 to 500 times the predetermined volume of the seed microorganism and whose population density is 1×10.sup.7 CFU/mL to 2×10.sup.10 CFU/mL; and feeding the produced microorganism preparation to the oil/fat-including wastewater.

A recovery system of composite powder carrier in HPB municipal wastewater treatment includes a biochemical tank and a concentration tank. The composite powder carrier is added to the biochemical tank for biochemically treating on the wastewater. The mixed liquid is then made to flow into the concentration tank. The supernatant obtained after filtration is then discharged. The concentrated sludge is returned to the biochemical tank, and the excess concentrated sludge is transported to a separator. The separator separates the substances with large specific gravity from those having smaller specific gravity, and the substances with large specific gravity are recycled to the biochemical tank for reuse. Matter having smaller specific gravity is discharged. The separator can be used to separate the composite powder carriers for recycling, which improves the utilization rate of the composite powder carriers and reduces the operation cost of the HPB technology for wastewater treatment.

A method of treating cooling circuit water of industrial plants (2) contaminated with organic substances and inorganic particles, comprises the following steps: a) separating the organic substances and inorganic particles from the cooling circuit water to obtain precleaned cooling circuit water; b) cooling the precleaned cooling circuit water by an open cooling tower (11) to obtain cooled precleaned cooling circuit water; c) desalinating at least a partial volume flow of the cooled precleaned cooling circuit water by an desalination plant (14) to obtain cleaned cooling circuit water; and d) adding bacteria capable of degrading organic substances present in the cooling circuit water. The bacteria are added to the cooling circuit water before the separation in accordance with step a), before the cooling in accordance with step b) and/or before the desalination in accordance with step c), to form a biological cleaning stage.

Provided are a water treatment method and a water treatment device that can be introduced in a standard tank with an effective water depth of 5 m or less during treatment of water to be treated that contains organic matter and a nitrogen component, and that allow improvement in efficiency of removing nitrogen from the water to be treated and suppressing energy consumption for aeration while maintaining a high MLSS. The water treatment method is for treating water to be treated that contains organic matter and a nitrogen component, and includes, in a biological treatment device (10) comprising at least an aerobic tank (40): a biological treatment step for biologically treating inflowing water to be treated aerobically by using sludge that contains granules; a solid-liquid separation step for separating die biological treatment solution in the aerobic tank (40) into treated water and concentrated sludge using a solid-liquid separation device (12); and a sludge return step for returning the concentrated sludge obtained in the solid-liquid separation step to a stage before the biological treatment device (10). The concentration of ammonium nitrogen remaining due to the nitrification reaction in the aerobic tank (40) is measured with an ammonium nitrogen concentration measurement device (16), and the amount of gas containing oxygen dispersed to the aerobic tank (40) is controlled with a blower (18) so that the measured ammonium nitrogen concentration is within a prescribed range.

A wastewater treatment system including a contact tank, a dissolved air flotation unit, a fermentation unit, and a biological treatment unit is disclosed. A method of retrofitting a wastewater treatment system by arranging the wastewater treatment system such that floated biosolids are fermented in an anerobic environment and fluidly connecting the biological treatment unit to receive at least a portion of the fermented solids is also disclosed. The method optionally includes providing a fermentation unit and fluidly connecting the fermentation unit to a biological treatment unit. A method of treating wastewater including combining the wastewater with activated sludge, floating biosolids from the activated wastewater, fermenting the floated biosolids, and biologically treating the effluent with the fermented solids is also disclosed. A method of facilitating delivery of soluble organic carbon to a biological treatment unit is also disclosed.

Provided is a process comprising receiving overflow of wastewater influent from a clarifier basin in a clarifier effluent collection trough; receiving inflow of wastewater influent from the clarifier effluent collection trough in a filter influent flow inlet distribution channel; maintaining substantially constant liquid level in the filter influent inlet distribution channel; applying hydrostatic pressure to push wastewater influent from the filter influent flow inlet distribution channel into an upflow backwash filter contusing denitrifying biomass or deammonification biomass; backwashing the backwash filter with a gas lift backwash flow; returning filter reject backwash wastewater from rejection compartment of the filter through denitrifying bacteria or deammonification biomass recycle return line to a location upstream of the filter; and recycling denitrifying bacteria or deammonification biomass from denitrifying bacteria or deammonification biomass recycle return line to at least one of the clarifier effluent collection trough, filter influent flocculation tank, or filter influent flow distribution channel.

A wastewater treatment method and system based on inoculating a bioreactor at startup with an integrated methanogenic aerobic single sludge with no additional inoculations thereafter to achieve anaerobic, aerobic, and/or anoxic treatment of industrial or municipal wastewater.

To promote anaerobic digestion and delay calcification, one or more signal molecules are used to regulate the microenvironment of anaerobic granular sludge. In the process of anaerobic granular sludge treatment of papermaking wastewater, AHLs (N-acyl Hyperserine Lactones) are added to papermaking wastewater before the papermaking wastewater enters the anaerobic reactor. This may occur when the proportion of microorganism in anaerobic granular sludge VSS/TSS is less than 0.6. Further, the addition of the one or more signal molecules changes the community structure of the bacteria and methanogens, promoting anaerobic digestion and delay calcification. Additionally, the microenvironment of granular sludge is regulated by adding one or more micro-signal molecules to improve the number of bacteria susceptible to calcification, improve the anaerobic digestion rate of sludge that has not been calcified, and delay the calcification rate.

The present invention relates to a wastewater treatment apparatus for shortcut nitrogen removal using anaerobic ammonium oxidation (ANAMMOX) and partial nitritation using ammonium oxidizing bacteria (AOB) granules. High-purity AOB granules are formed by means of AOB predominance using a side stream generated during a sludge treatment process. Moreover, the formed AOB granules are supplied to a partial nitritation tank (130) of a main treatment process and thus the partial nitritation is efficiently performed and nitrogen is quickly removed, and thus oxygen and an organic material is reduced compared to an existing method.