54 results about "Aerobic treatment system" patented technology

The invention relates to a sewage treatment method and a sewage treatment system and in particular relates to a domestic sewage treatment method and a sewage treatment system. Compared with an existing sewage treatment process, the sewage treatment process disclosed by the invention cancels components such as fine grids, sand settling ponds or secondary sedimentation tanks and procedures such as sludge thickening and sludge disposal in an existing sewage treatment process, simplifies the treatment procedures, is beneficial for control and management, is low in operation cost and is applicable to sewage treatment plants in villages and towns, and moreover the quality of treated effluent can meet the first class A standard or standard of recyclable water according to demands. The sewage treatment system adopts modularization design, industrialized production and modularization mounting, is simple in civil construction, short in engineering construction period, simple to operate and control, small in occupied area and small in number of expected operation personnel; various treatment function sections can be flexibly combined according to practical demands according to different qualities and amounts of sewage.

A vacuum-actuated liquid chlorine dispenser for use in an aerobic treatment system. Effluent is diverted from a discharge pipe in an aerobic treatment system into an inlet of a venturi chamber. The resulting pressure differential resulting from effluent flowing through the venturi chamber is communicated to a dosage container, which results in disinfectant flow from a reservoir into the dosage container until the volume of disinfectant contained by the dosage container causes a pressure control device, such as a float valve, to inhibit further pressure communication. Thereafter, the accumulated disinfectant within the dosage container egresses through a disinfectant outlet that may include a flow regulation device such as a drip emitter or check valve. The present invention allows for more regular dosing of known and accurate disinfectant amounts following each pumping cycle of the aerobic treatment system.

The present invention relates to an equipment and method for processing black liquor of straw pulp papermaking by alkaline method, which comprises the following two steps in turn: 1. Black liquor treatment: black liquor and flocculant are mixed with dilute acid in a static mixer, and the overflow of the tank is precipitated by flocculation. into the inclined mesh filter for filtration. When the inorganic acid acidifying agent is added, the pH value of the mixture is reduced to 3.5-1.5, and the lignin in the black liquor forms a brown floc which is easy to filter. The filtrate and floc can be separated quickly and well in the inclined screen filter. 2. Filtrate treatment: After 1-3 days of storage and hydrolysis, the filtrate is neutralized by adding white mud or lime, the waste produced by the papermaking alkali recovery method, so that the pH value reaches 6.5-7.2, and enters anaerobic after sedimentation in the sedimentation tank. Pool biochemical treatment. After treatment, enter the middle stage water treatment system for aerobic treatment and then reuse or discharge. The invention has simple equipment process and low investment, and after the filtrate is hydrolyzed, neutralized and anaerobic biochemically treated, it can ensure that the filtrate is discharged up to the standard without affecting the treatment effect of the subsequent middle stage after being mixed into the middle stage water.

A pressure-actuated disinfectant dispenser and method for treating wastewater in an aerobic treatment system. The dispenser includes a reservoir for holding a disinfectant supply and a dosage container for holding a dosage of disinfectant. The container is positioned within the reservoir and has a flow-regulated path for fluid communication from the reservoir into the container. The invention also includes actuation means for increasing the pressure within the dosage container to force disinfectant therefrom, and a discharge assembly for discharging fluid from the dosage container into said storage tank.