A methodology, system and apparatus are provided that include anoxic biofilms to perform partial denitrification and anammox (PdNA) reactions. The PdNA reactions can facilitate process intensification and carbon efficient biological nitrogen removal. The anoxic biofilms can be placed in a pre-anoxic zone or a downstream anoxic zone, where the biofilm and reactions are managed, including using storage compounds, to overcome mass transfer limitations in the biofilm. The methodology, system and apparatus can, when compared to state-of-the art technologies, improve the concentration gradient or reduce mass transfer limitations to facilitate PdNA reactions.

Described herein are attached growth reactor systems which increase nitrifying bacteria biomass through a variety of means during warm weather. As a consequence, the attached growth reactor system contains sufficient nitrifying bacteria biomass to remove ammonia from wastewater in cold to moderate climates. In one example, there are two attached growth reactors into which wastewater is distributed discontinuously. Specifically, wastewater is transferred to the first attached growth reactor for a first period of time and then is transferred to the second attached growth reactor for a second period of time during warm weather which effectively doubles the nitrifying bacteria biomass in the system. During cold weather, approximately half of the wastewater is applied to each reactor simultaneously.

The invention relates to a method and an assembly for recovering magnesium ammonium phosphate from slurry that is supplied to a reaction container (10) in which an aerobic milieu is present and in which the slurry is guided in a circuit with the aid of ventilation. Cationic magnesium, such as magnesium chloride, is added to the slurry, and magnesium ammonium phosphate crystals which are precipitated from the slurry are removed via a removal device (30) provided in the base region of the reaction container. Substances which contain magnesium ammonium phosphate crystals collected in the removal device (30) are loosened and/or rinsed.

A method for modifying a wastewater treatment device, the method including: 1) fixing a filling support in a wastewater pool, where the filling support includes a support frame; the support frame includes a hollow shaft, a fixed ring, and at least one vane; 2) adjusting the height of the filling support, until the fixed ring is submerged below the liquid level of the wastewater pool, where the water intake velocity of the wastewater pool is no less than 0.25 m/s, whereby a water current is produced and drives the support frame to rotate; 3) adding a functional liquid into the hollow shaft; and 4) adding an enzyme mixture to the hollow shaft when the rotation speed of the support frame is less than a first preset value, until the rotation speed of the support frame reaches a second preset value.

A syntrophic enrichment for enhanced digestion (SEED) system is presented, in which a retrofit addition to existing anaerobic digestion infrastructure provides improved digestion process rate and biogas quality. The system provides optimal niche environments for accelerating fermentative, syntrophic and methanogenic metabolisms to increase digestion system loading rates and enhance main digester microbiome. Prescribed media formulations, reactor integrations, and operational methods using various fixed and loose media enhance global digestion system performance. The retrofitted system enables existing plants to transition from an outdated solids-management model to one of valorized biomethane production.

Provided herein are improved brine tanks comprising a brine tank lid with two parts for customizable identification, and a brine tank body with one or more indentations for easier removal of the brine tank lid.

Apparatus for treatment of wet organic matter to produce biogas, comprising a closed reactor (11) for anaerobic digestion of the wet organic matter. The anaerobic reactor comprises two vertical 5 tubes, a vertically arranged outer tube (14) defining a first reactor chamber (111) enveloping a vertically arranged inner tube (15) which is divided into a first region (112a) and a second region (112b) of a second reactor chamber (112) by a vertical partitioning wall (16). The first reactor chamber comprises a particle retaining unit (31) connecting the first and the second reactor chambers. The anaerobic reactor (11) exhibits a top discharge pipe (18) for gas developed in either 0 of the two reactor chambers (111, 112). A method for treatment of wet organic matter is also contemplated.

A sewage treatment apparatus comprises an external box body, the external box body is internally provided with a grid zone, an anaerobic and anoxic zone, an aerobic zone, a settling zone, an advanced treatment zone and a disinfection and sterilization zone communicating in sequence. The grid zone communicates with a household septic-tank through the pneumatic lifting apparatus, the aerobic zone communicates with the anaerobic and anoxic zone to reflux a part of mixed liquid to an anaerobic zone of the anaerobic and anoxic zone, and the settling zone communicates with the anaerobic and anoxic zone to reflux a part of active sludge to an anoxic zone of the anaerobic and anoxic zone; and the sewage treatment apparatus further comprises an apparatus zone which is arranged independently and separately, and the apparatus zone is merely internally provided with an air compressor for providing a conveying pressure.

The present invention concerns a biological reactor used in the field of sanitation for the treatment of sewage and industrial wastewater. The solution proposed in this invention is the coupling of two different treatment processes (anaerobic and aerobic) in the same fixed bed reactor. The invention aims to allow for the construction of plants for the treatment of sewage or very compact industrial effluents, where it is possible to achieve high treatment efficiencies with a small implantation area. In addition, due to the combination of the anaerobic and aerobic processes in fixed beds in the same reactor, the system consumes less energy for aeration and generates a smaller amount of sludge, considerably reducing the operating costs of the treatment plant.

The invention is a system of raising an effluent level of a septic system drainfield. The system includes an outer housing comprising an inlet in fluid communication with a septic tank. The housing further includes an outlet that enables the effluent to exit the system at a higher elevation. The housing interior includes a hollow insert that extends above a bottom surface of the housing. A baffle is positioned within the interior of the housing to surround the insert, dividing the housing interior into two compartments with insert passing therethrough. In use, wastewater effluent enters the housing interior from a septic tank and gravity falls into the bottom of the housing. An air pump can then be initiated to pump air into the system, which lifts the effluent into the housing upper compartment, where it will exit the system at a higher elevation.