A process for anaerobically treating a feed of manure that contains liquid and suspended solid in a reaction that uses a multicell lagoon reactor (MCLR) wherein the reaction system has an input cell, an output cell, and one or more intermediate cell all in series and located at least partially below the ground. A partition separates the cells to restrict a gravity induced flow of liquid and solids retained cell. The solids retention time exceeds the hydraulic retention time in each cell. Enclosing the cells enables collecting of biogas from the cells. At least an input cell operates as an anaerobic sequencing batch reactor that undergoes periodic mixing. An output cell provides treated liquid for recovery.

A septic sludge alarm assembly includes a vault buried beneath ground thereby facilitating the vault to be aligned with a septic tank. A sludge trap is positioned within the vault. The sludge trap has an inlet fluidly coupled to a septic tank and an outlet fluidly coupled to a leach field supply. The sludge trap has a lower section facilitating liquid flowing into the inlet to flow downwardly into the lower section. The sludge trap has an upper section inhibiting the liquid from flowing upwardly into the upper section. The sludge trap urges the fluid to flow upwardly into the upper section when the lower section becomes sufficiently filled with sludge. A flow alarm is actuated when the sludge trap urges the fluid to flow upwardly into the upper section thereby facilitating the alert to be alerted that the septic tank needs to be emptied.

A gas-liquid-solid separator can include a separator body having a vertical outer wall and a gas collector having a vertical gas collector wall surrounded by the outer wall, with a gas inlet opening at a bottom of the gas collector. An annular volume between the gas collector wall and the outer wall can contain a plurality of inclined flow channels. The flow channels can have a channel inlet opening at the bottom and can slope upward following a helical path between the gas collector wall and the outer wall. A gas-liquid-solid mixture inlet opening can be in a floor of the separator body. The mixture opening can be positioned below the gas inlet opening and the mixture inlet opening can have a top-down profile that fits within a top-down profile of the gas inlet opening.

A chemical plant and process are provided. The plant comprises a first biomass feed, a biomass digester arranged to receive the first biomass feed and provide a biogas stream, a reformer section arranged to receive at least a portion of the biogas stream and provide a first synthesis gas stream, and a first waste water stream, and a synthesis section arranged to receive a synthesis gas stream from the reformer section and provide a raw product stream. At least a portion of the first waste water stream is arranged to be fed to the biomass digester. In such a matter, water and heat produced downstream in the plant/process is recycled upstream in the plant/process.

The present invention relates to a method and to a device for continuous cleaning of process water circulating in a device for treating waste paper. The process water is supplied, from a unit of the device, to an anaerobic reactor comprising a gas separator, and the cleaned process water is returned back to a unit of the device, wherein this unit is selected from: a pulper; screening device; dewatering unit; oxidation/reduction unit; centrifugal screening device; fine screening device; paper-machine mould section; paper-machine press section; reject treatment unit; fibre recovery unit; and drying section; wherein the content of inorganic solids in the reactor is measured and, if this content exceeds a pre-set limit value, process water from the reactor is continuously fed to a solid-liquid separator for separation into a fraction that is depleted of inorganic solids and a fraction that is enriched with inorganic solids, wherein the fraction that is depleted of inorganic solids is returned to the anaerobic reactor and the fraction that is enriched with inorganic solids is conveyed away out of the device, until the content of inorganic solids in the process water is less than the limit value.

Provided is a method for enhancing self-enrichment of anammox bacteria by nitrate-dependent denitrifying bacteria symbiotic metabolism, belonging to the field of biological wastewater disposal. Excess sludge from a municipal wastewater treatment plant is inoculated into an enhanced anammox bacteria self-enrichment system (a closed SBR (Sequencing Batch Reactor)). The method includes the following steps: taking sodium acetate as a carbon source, enriching nitrate-dependent denitrifying bacteria at first, and transforming nitrate into nitrite to provide a sufficient substrate for the growth of anammox bacteria; in turn, the enriched anammox bacteria provide nitrate for the nitrate-dependent denitrifying bacteria to grow.

A method and a system for removing a portion of at least one contaminant gas from a gas stream is disclosed. The method comprises the steps of: a) applying a voltage across a pair of electrodes in contact with a working fluid to generate a plurality of ions; and b) reacting the at least one contaminant gas with the plurality of ions to convert it to one or more reaction products, thereby sequestering at least some of the contaminant gas from the first gas stream to produce a second gas stream, wherein the pH of the working fluid is substantially maintained at a predetermined set point for improving the efficiency of the conversion. The invention also relates to a process for treating sewage or wastewater by adding the one or more reaction products to: the sewage, wastewater, sludge and/or an anaerobic digester.

Provided are a household toilet waste treatment system and a method of treating toilet waste using the same, the household toilet waste treatment system comprising a solid-liquid separation toilet, a biological treatment apparatus, a sterilization apparatus, and a combustion apparatus. The combustion apparatus complements a slow biological treatment apparatus to allow continuous treatment of the household toilet waste in a unit space without long-distance piping connections.

A water treatment apparatus includes an anoxic tank configured to receive raw water, a treatment tank including a plurality of membrane separators immersed therein, an inflow path configured to supply water to be treated from the anoxic tank to the treatment tank, and a return path configured to return the water to be treated from the treatment tank to the anoxic tank. The membrane separators are arranged in a plurality of rows in the treatment tank. The return path extends directly below and along each row of the membrane separators. Portions of the return path corresponding to the respective membrane separators arranged in each row are covered, and openings to receive the water to be treated are provided in portions of the return path corresponding to respective gaps between the membrane separators.

An organic solid waste anaerobic digestion device based on uncoupling of hydraulic retention time (HRT) from sludge retention time (SRT) includes a self-sustaining air flotation screening tank. A sludge pipe of the self-sustaining air flotation screening tank is connected with a first separating mechanism. A bottom of the first separating mechanism is connected with a second separating mechanism, and two separating mechanisms are connected with a return pipe of the self-sustaining air flotation screening tank. Through the two separating mechanisms, the heavy inert materials at the bottom of the self-sustaining air flotation screening tank can be subjected to swirl separation, so that the liquid part, the solid part and the gas part can be completely separated, and then the useful active materials are conveyed to the reaction device.