4results about How to "Increase hydraulic load" patented technology

The invention belongs to the technical field of sewage treatment, and provides a sulfur autotrophic multistage soil infiltration system and application. The system comprises a sulfur autotrophic multi-stage soil infiltration reactor, an intermittent micro-aeration module, a uniform water distribution module and a water collection layer, a nitrification unit, a denitrification unit and a phosphorus removal unit are sequentially distributed on the sulfur autotrophic multi-stage soil infiltration reactor from top to bottom; the nitration unit comprises a percolation layer, and the percolation layer comprises filler I; the percolation layer of the denitrification unit comprises a mixed filler II, the soil mixing block comprises a mixed filler IV, the percolation layer of the phosphorus removal unit comprises a mixed filler III, and the soil mixing block comprises a mixed filler V. The sulfur autotrophic multistage soil infiltration system has excellent CODcr and nitrogen and phosphorus removal performance, good impact resistance and anti-blocking performance, high economic benefit and small occupied area, solves the problem of insufficient nitrification, strengthens the sulfur autotrophic denitrification process, and promotes further treatment, application and popularization of decentralized sewage.

The present invention discloses a composite process treatment system suitable for rural domestic sewage, including an anaerobic tank, an anoxic tank connected to the bottom of the anaerobic tank, an aerobic multi-media biofilm tank connected to the upper part of the anoxic tank through an inlet system, a sedimentation tank connected to the upper end of the aerobic multi-media biofilm tank through an outlet pipe, a nitrification liquid return pipe and a sludge return pipe respectively connected to the upper and lower ends of the sedimentation tank, wherein the nitrification liquid return pipe and the sludge return pipe are respectively connected to the anoxic tank and the anaerobic tank; and an ecological pond connected to the upper end of the sedimentation tank through an ultraviolet disinfector. The present invention is designed for rural domestic sewage treatment, and the composite process technology is obtained by combining the enhanced biological method with the ecological method to obtain a composite system of a multi-media biofilm treatment system and a high-efficiency ecological pond, which greatly improves the effect of rural domestic sewage treatment.

The present application provides a kind of ecological purification method for treating aquaculture tail water, and is sequentially provided with multifunctional drainage ditch, ecological oxidation dam, stable sedimentation pond, continuous biological filter pond and composite purification bed along the direction of aquaculture tail water flow.The garbage intercepting device, ecological revetment and buffer zone are arranged in the multifunctional drainage ditch;The ecological weir, ecological frame, fixed pile, water collecting wall and lifting pump are arranged in the ecological purification dam;The floating plant area, multiple interception and purification devices and aeration device are arranged in the stable sedimentation pond;The culture area is arranged in the continuous biological filter pond, and after the water flow passes through multiple aeration biological filter areas, it enters the effluent area uniformly;The composite purification bed includes plants, improved substrate layer, purification layer, filtration and water collection layer, impermeable layer and effluent area.The method can effectively remove the refractory pollutants and toxic and harmful substances in aquaculture tail water, has low construction cost, small land area, low operation and maintenance cost, and the effluent can be resource utilization.

A low-drug coagulation-ultrafiltration device and a secondary coagulation-ultrafiltration device for dealing with high turbidity belong to the field of water treatment technology. The present invention solves the problem of low water treatment efficiency and inability to deal with sudden high turbidity water treatment in existing water treatment equipment. It includes a low-drug coagulation-ultrafiltration device, an intermediate water tank and a second dosing assembly tank. The second dosing assembly tank is connected to the coagulation assembly tank through a pipeline. The water inlet and outlet of the intermediate water tank are connected to the upper part of the inclined tube sedimentation area and the upper part of the coagulation assembly tank through the fourth water inlet pipe and the fifth water inlet pipe respectively. The pipeline is controlled by setting valves on each pipeline. Adaptive treatment of high turbidity changes in raw water is achieved. In severe weather such as heavy rain, high turbidity water treatment is achieved by starting the intermediate water tank and adding potassium permanganate to strengthen secondary coagulation, thereby reducing the cost of chemicals and reducing the floor space. When the water quality conditions are normal, such as low turbidity, it can directly enter the membrane filtration assembly tank without passing through the intermediate water tank.