The present invention discloses a heavy metal treatment composite microbial agent in water and a preparation method thereof, belonging to the field of heavy metal treatment. The microbial agent of the present invention is prepared from the following components in parts by weight: 20-30 parts of Pseudomonas, 15-30 parts of Bacillus, 5-15 parts of Staphylococcus, and 5-15 parts of Pichia pastoris. The microbial agent of the present invention can quickly and efficiently adsorb and remove heavy metal ions, and the removal efficiencies of the microbial agent of the present invention on the cadmium, copper, lead and chromium after 2 d reach 81.0%, 56.5%, 52.0% and 74.0% respectively, wherein the adsorption and removal effects on the cadmium and chromium are most obvious. In addition, the microbial agent of the present invention can effectively improve the removal efficiency of the pollutants in the sewage to be treated, can achieve 80% CODMn removal rate or more, 85% TN removal rate or more, 80% TP removal rate or more, and 80% NH.sub.4.sup.+-N removal rate or more with a small amount, meets the pollutant discharge standards of the sewage treatment plant, and has a good application prospect.

The invention pertains to a method for the purification of substrate-containing wastewater in a continuous flow-through aerobic biologically activated sludge reactor B, wherein at least part of biological sludge 6 is conditioned in a selector S under anaerobic or anoxic conditions with at least part of the substrate-containing, to-be-purified wastewater 2, optionally after a pre-treatment step VB of the supplied wastewater 1, such that at least 20 wt % of the sludge in the selector S has a residence time in the selector which is at least 20% greater than the hydraulic residence time of the sludge/water mixture in the selector, after which the thus conditioned sludge/water mixture 3, optionally after an additional anaerobic or anoxic contact step, is fed to the aerobic purification reactor B and subjected to aerobic treatment B, wherein the treated wastewater 4 after aerobic treatment is optionally separated from the sludge by settling NB, flotation or mechanical separation, and wherein (at least a portion of) the sludge separated from the aerobically treated wastewater is returned to the selector as return sludge 6.

The present disclosure relates to a sewage/wastewater treatment system using granular activated sludge and a membrane bio-reactor and a sewage/wastewater treatment method using the same that are configured to effectively remove pollutants contained in raw water through a granulation tank in which the granular activated sludge is contained and to allow the raw water to be filtered through movable membranes located on the upper portion of the granulation tank. The system includes: an indirect aeration tank adapted to supply air thereto to allow dissolved oxygen contained in raw water to reach a saturation concentration; a granulation tank adapted to allow floating microorganisms contained in the treated water passing through the indirect aeration tank to be granulated and having a sludge blanket formed thereon; and movable membranes located on the upper portion of the granulation tank in such a manner as to be movable in the granulation tank.

Provided is a nano-photocatalyst-microorganism composite multilayered light-transmitting combination support, comprising a plurality of wave-shaped plexiglass plates (1), a tandem rod holder (4), hollow elastic spacers (5), and fixing screws (6); each of the wave-shaped plexiglass plates (1) is provided with four fixing holes (7); the tandem rod holder (4) is provided with four tandem rods (8), and the four tandem rods (8) pass through the fixing holes (7); the tandem rods (8) between the two adjacent wave-shaped plexiglass plates (1) pass through the hollow elastic spacers (5); each of the tandem rods (8) is provided with a fixing screw (6) at the top end; each of the wave-shaped plexiglass plates (1) have different loading layers on the upper and lower surfaces, with a nano-photocatalyst-loading layer (2) on one surface and a degrading bacteria-loading layer (3) on the other surface. Also provided is a method of making the nano-photocatalyst-microorganism composite multilayered light-transmitting combination support.

An apparatus and a method for removing nitrogen and phosphorus from sewage by using sponge iron and activated sludge are disclosed herein. The apparatus comprises a raw tank, a pH adjusting tank, a primary SBBR reactor, a secondary SBBR reactor, an intermediate tank, and a discharge tank; by modification of sponge iron, preparation of composite filler, sludge inoculation and domestication, and sewage treatment, an effect of simultaneous denitrification and dephosphorization is achieved in one reactor using the combined action of sponge iron and activated sludge with high nitrogen and phosphorus removal efficiency.

A composition useful for removing energetic compounds from contaminated environments. The composition includes a supported reactant including an adsorbent with high affinity for energetic compounds. Further, the composition includes a first bioremediation material comprising at least one organism capable of degrading an energetic compound and a polymeric substance fueling the first bioremediation material during the degrading of the energetic compound. Additionally, the composition includes a second bioremediation material breaking the polymeric substance into smaller molecules over a degradation time period to provide the fueling of the first bioremediation material in a time-release manner.

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.

Provided is a method for forming aerobic granules in which a semibatch reactor for forming granules is used, the method involving repeatedly carrying out an inflowing step for causing organic-matter-containing wastewater that includes organic matter to flow in, a biological treatment step for biologically treating substances to be treated in the organic-matter-containing drainage water by using microbial sludge, a settling step for allowing the microbial sludge to settle out, and a discharge step for discharging biologically treated water which has been biologically treated, wherein the reaction time is adjusted such that the value obtained by dividing the total cycle time by the reaction time and multiplying the resulting quotient by the ratio of the MLSS concentration to the BOD load charged into the semibatch reactor is within a range of 0.05 to 0.25 kgBOD/kgMLSS/d, and the sludge is drawn such that the sludge retention period is 5 to 25 days.

A system for biologically treating wastewater comprising a rotating drum disposed within a tank. Biofilm carriers are contained in the drum. One or more hollow tube aerators are secured inside the drum to a perforated wall that forms a part of the drum. As the drum is rotated within the tank, the mixing of the biofilm carriers with the wastewater therein and the action of the hollow tubes aerates the wastewater in the rotating drum.

A method for the treatment of water, the method comprising the steps of anaerobic uptake and storage of at least a portion of the organic components in the water by a heterotrophic denitrifying biomass absorption of ammonium ions with an ammonium ion absorbent; and aerobic oxidation of the absorbed ammonium by a nitrifying biomass comprising ammonium oxidizing microorganisms, wherein the step of aerobic oxidation of the absorbed ammonium is preceded by the step of exposing at least a portion of the nitrifying biomass to atmospheric oxygen.