A water treatment control system includes an aerobic tank in which aerobic treatment is carried out, an aerobic tank aeration device that aerates to-be-treated water in the aerobic tank, a membrane filtration tank including a separation membrane that filters the to-be-treated water treated in the aerobic tank, a membrane filtration tank measurement instrument that measures the ammonia concentration of the to-be-treated water in the membrane filtration tank, as a membrane filtration tank ammonia concentration measurement value, and an aerobic tank aeration air volume calculation device that sets the aerobic tank aeration air volume of the aerobic tank aeration device on the basis of the membrane filtration tank ammonia concentration measurement value.

In one embodiment, a method of reducing at least one of nitrogen, carbon and phosphorous in a lagoon that includes at least three cells.

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.

A bubble splitter, which is arranged for splitting gas bubbles in a bubbled liquid in at least a micro size, includes a splitting housing, a plurality of first splitting discs, and a plurality of second splitting discs. The first and second splitting discs are alternating with each other to be spacedly supported within the splitting housing, wherein a plurality of peripheral passages are formed at peripheral portions of the first splitting discs respectively and a plurality of central passages are formed at center portions of the second splitting discs respectively. The bubbled liquid is detoured to radially and outwardly move from the central passage to the peripheral passage and is detoured to radially and inwardly move from the peripheral passage to the central passage so as to split the gas bubbles in the bubbled liquid in at least a micro size.

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.

An apparatus and method for oxygenating a flow of mixed liquor, typically from an aeration tank, to a secondary clarifier permits further biological reduction of biochemical oxygen demand (BOD) of a waste stream, such as waste water while resident in the secondary clarifier. In some embodiments, the mixed liquor may be oxygenated to levels at or above about 4 mg/L. Depending upon the user requirements and the BOD of the waste stream, all or a portion of the mixed liquor may be treated to raise the dissolved oxygen content. Various apparatus may be used for superoxygenation, including, as one example, a superoxygenation cone, such as a Speece cone.

Increased control and efficiency over the wastewater purification can be achieved through creating conditions that allow to selectively prioritize the digestive function of microorganism in the activated sludge. The gas-dispersion return sludge is created using pure oxygen or oxygen containing trace amounts of ozone as a reactive gas, which is blended with return sludge to create a mixture of gas and liquid, which is passed through an atomizer or a cavitation pump to instantly render the reactive gas in the mixture to an ultra-fine bubble state. At least a portion of the ultra-fine bubbles dissolve within the gas-dispersion return sludge, activating the dormant microorganisms. Due to a complete or an almost complete absence of digestable organic material in the gas-dispersion return sludge, the microorganism prioritize their digestive function, and when exposed to organic pollutants present in wastewater, digest the pollutants into water and carbon dioxide at an increased rate.

A stabilized, gas-infused liquids containing ultra high concentrations of infused gas, produced by: generating a gas-infused liquid in a sealed vessel under a high pressure of at least 20 psi; stabilizing the gas-infused liquid by passing the liquid while still under the high pressure through a tubular flow path arrangement which compresses the infused gas into nano bubbles in the liquid; infusing an additional amount of the gas into the stabilized liquid by injecting the same, while still under high pressure, back into the sealed pressure vessel along with more of the gas; and again stabilizing the liquid by again passing liquid, while still under the high pressure, through the tubular flow path arrangement to thereby form the additional amount of infused gas into nano bubbles in the liquid.

The present disclosure is directed toward membrane biofilm reactors primarily comprising microorganisms that produce chemical fuel products or precursors thereof. Reactors of the present disclosure can primarily comprise acetogens, a methanotrophs, and/or Methanosarcina acetivorans.

The invention relates to a bioreactor having a tank (1) with at least one bioreactor compartment (1a-1c) containing a carrier medium, on the surface of which a biofilm may grow, supply means for supplying the water to be purified into the bioreactor compartment (1a-1c) from the first longitudinal end of the compartment, discharge means at the second opposite longitudinal end of the compartment (1a-1c) for discharging the processed water from the compartment, means (7) for supplying the reaction gas required for the purification process into the bioreactor compartment, and means for agitating the carrier medium and the water to be purified into a rotary motion inside the compartment. In the bioreactor compartment (1a-1c), extending in its longitudinal direction, is arranged a perforated pipe (4), which is at a distance from the inner walls (8, 9) of the bioreactor compartment, and in the inlet end area of which pipe (4) are guide means (2a-2c, 13a-13c) for guiding the water to be purified into a bioreactor space outside the pipe (4), from which space the purified water enters inside the perforated pipe (4) and discharges from it through the outlet at the outlet end of the bioreactor compartment (1a-1c).