Described herein is aerobic granular sludge gravity-driven membrane system, methods of making and using thereof are described. The aerobic granular sludge (AGS) integrated with a gravity-driven membrane (GDM) filtration system is an energy efficient wastewater treatment system that takes advantage of AGS reactor systems integrated with gravity-driven membrane system to reduce membrane fouling and produce microbiologically and chemically safe water. The AGS-GDM system includes at least an AGS reactor tank containing raw wastewater and granular sludge and a membrane tank including one or more gravity-driven membrane(s).

The present invention relates to the technical field of environmental engineering, and particularly relates to a method for treating and recycling waste slurry in bobbin paper production. The present invention employs aerobic granular sludge technology-based two-stage process of treating and recycling waste slurry in bobbin paper production, and has features of low agent feeding, small floor space occupation, a short operating cycle, and easy controllability. By treating a high-load waste slurry in an adsorption section having aerobic granular sludge, fibrous materials in the waste slurry can be concentrated efficiently and resource substances can be recycled. By treating water discharged from the adsorption section with aerobic granular sludge in a biochemistry section, a water release can be guaranteed to stably meet the standard. By employing the method, the amounts of the fibrous materials and proteins adsorbed by the aerobic granular sludge in the adsorption section reach 710 mg/g MLSS and 140 mg/g MLSS respectively, the concentrations of COD, NH4-N, TP and SS of water released from the biochemistry section are 98 mg/L, 4.1 mg/L, 0.8 mg/L and 100 mg/L respectively, and the removal rates of COD and SS reach 98.8% and 96.2% respectively, enabling water release to meet a corresponding release standard.

A polyhydroxyalkanoates extraction system comprises a pretreatment subsystem, an extraction subsystem and a recycling subsystem. The pretreatment subsystem comprises a fermentation device and an activation device so as to carry out a microorganism acclimation process. The extraction subsystem comprises a freezing device, a pretreatment device and an extraction device. The extraction subsystem is used for receiving a third sludge so that the third sludge is subjected to a freezing process, a pretreatment process, an extraction process and a purification process in the freezing device to form a polyhydroxyalkanoates mixture, and the extraction device performs a precipitation process to generate polyhydroxyalkanoates precipitate. The recycling subsystem comprises an aerobic sludge digestion device and a sequencing batch reactor activated sludge treatment device so as to carry out an aerobic sludge digestion process and a sequencing batch reactor activated sludge process.

A method for the efficient operation of a waste treatment apparatus comprising an anaerobic-aerobic sequencing batch reactors (SBR). The method comprises the synchronized transfer of waste between the reactors, for preventing unsafe buildup of pressure in the anaerobic reactor and reaching unsafe levels.

An aquaculture system including a fish tank, a floating media bioclarifier, and a mineralization tank. The mineralization tank includes a first influent inlet for receiving sludge having a first solids concentration from the bioclarifier, an effluent outlet for returning to the bioclarifier a fluid having a second solids concentration less than the first solids concentration, and a second influent inlet configured to receive influent from the fish tank which has bypassed the bioclarifier. A hydroponic system is configured to receive effluent from the bioclarifier.

An above-ground low-energy method of dewatering highly contaminated waste e.g. leachate contaminated with at least a first group of contaminants and PFAS is described. The method comprises the step of removing the PFAS before removing the first group of contaminants. The removal of PFAS is undertaken by actively aerating the contaminated waste comprising PFAS to produce a waste stream comprising a concentration of PFAS and a liquid stream having at least some of the first group of contaminants. The one or more liquid streams are separated from the waste streams so as to dewater the contaminated waste. Optionally, the liquid streams are treated to remove the first group of contaminants.

The invention relates to a waste water treatment plant including at least a multi-step water treatment reactor arranged for receiving influent waste water, for carrying out at least a biological step and a sedimentation step and for providing effluent pure water, by means of an effluent weir. The wastewater treatment plant further includes means for increasing the sedimentation velocity, and means for hindering floating elements to get into the effluent weir.

Disclosed are partial nitritation using a sequencing batch reaction tank with media inputted thereinto, and an apparatus and system for shortcut nitrogen removal using the same. According to one aspect of the present embodiment, a sequencing batch reaction tank operating apparatus and method capable of smoothly performing partial nitritation by adjusting the concentrations of free ammonia and free nitrous acid are provided.

An installation for treating a wastewater effluent in a constant-level sequencing batch reactor (SBR), the SBR includes a chamber that is able to contain a mixture of wastewater and sludge comprising different levels, each level being defined by a concentration and/or a density of sludge, a sludge bed situated at the bottom of the chamber, a device for supplying the SBR with a volume of effluent to be treated close to the bottom of the chamber, in the sludge bed, preferably via a distribution network covering the bottom of the chamber, means for recovering a clarified fraction of the contents of the chamber, the SBR being able to implement a treatment method comprising a biological treatment reaction sequence comprising at least a step of aerating the contents of the chamber, during which the level of the surface of the mixture rises, a decanting step, during which sludge is deposited on the bottom of the chamber and the contents of the chamber are clarified close to the surface thereof, a step of recovering the clarified fraction of the contents of the chamber, the recovery step and supply step taking place simultaneously, so as to keep the level of the contents of the chamber substantially constant during the recovery step and supply step, the installation also comprising control means and recovery means.

The present invention discloses a recirculating aquaculture system (RAS) and method for shrimp culture through SBR wastewater treatment. The RAS includes a control cabinet, culture tanks, a clean water tank, a clean water filling pipeline, a drainage pipeline, a buried activated sludge tank and a solid-liquid separation mechanism. The solid-liquid separation mechanism comprises a sludge pump, an input pipe, a plate and frame type filter press and a liquid output pipe. An input end of the sludge pump is immersed in sewage of the buried activated sludge tank; and a clean water output end of the plate and frame type filter press is connected with the buried activated sludge tank through the liquid output pipe.