39results about How to "Reduce sludge discharge" patented technology

The invention relates to a water treatment device. The invention provides a cyclic AO high nitrogenous organic waste water treatment device based on an MBR. The cyclic AO high nitrogenous organic waste water treatment device based on the MBR comprises a reactor with a water storage cavity and a control device, wherein the reactor is connected with a water inlet device, an aeration device and a membrane water outlet device, a membrane biological reactor is arranged in the water storage cavity of the reactor, the water feeding device comprises a water inlet pope, the aeration device comprises an aeration pipe, the MBR is suspended above the water inlet pipe, the MBR is suspended above the aeration pipe, the MBR is connected with the membrane water outlet device, and the water inlet device, the aeration device and the membrane water outlet device are respectively connected with the control device. The cyclic AO high nitrogenous organic waste water treatment device based on the MBR has the beneficial effects that aeration rate is reduced, less sludge is discharged, control is simple, and daily maintenance management is simple, so that water quality is guaranteed; the MBR is not polluted easily, cost is low, occupying area is small, and maintenance is convenient.

A cast-in-situ pedestal pile for building, bridge and foundation is composed of concrete pile column, reinforcing bar cage in the said pile column, grouting pipe bound to the said reinforcing bar cage, and several variable supporting disks. Its forming method includes such steps as drilling hole of pile, squeezing and expanding to form variable supporting disks, putting reinforcing bar in the hole of pile, pouring concrete into pile hole and supporting disks, and cement grounting the pile bottom and supporting disk under sides. Its advantages include high load-bearing capacity and low drained slurry.

The invention relates to a sand-adding sedimentation tank for realizing high-efficiency mud discharge, which includes a water distribution well, a coagulation area, a flocculation area, a sedimentation separation area and an outlet channel connected in sequence along the sewage flow direction, and the sedimentation separation area is also equipped with There is a mud suction device and a mud level control device for monitoring and controlling the thickness of the sludge at the bottom of the sedimentation separation area; The mud collection tube with the rotation of the mud hole, two suction main pipes symmetrically connected to the outer peripheral wall of the mud collection tube along the central axis of the mud collection tube, the mud discharge pipe connected to the bottom of the mud discharge hole, and the mud discharge pipe connected The dredging pump and the motor used to drive the mud collecting tube to rotate; the mud collecting tube communicates with the mud discharge hole, the side of the dredging main pipe facing the bottom of the sedimentation separation area has a side edge, and the dredging main pipe is provided with Round suction hole. The invention has the effects of low energy consumption, high mud discharge concentration and high mud discharge efficiency per unit time.

The invention discloses a vertical continuous flow phosphorus removing device and method. The vertical continuous flow phosphorus removing device comprises a sedimentation tank, a reactor and an adjustable aeration device. The sedimentation tank comprises a water outlet, a sludge and water collecting vessel, a sludge outlet and a sludge particle return hole. The reactor comprises an overflow weir, a flow guide pipe, a sampling hole, a returned sludge inlet and a water inlet. The adjustable aeration device comprises a supporting frame unit, an annular baffle and an aeration ring. The method comprises the steps of firstly, enabling urban sewage to enter an anaerobic region in the reactor through the water inlet, forming intercellular polymers (pha, phb and phv) from an organic carbon source in the sewage by using polyphosphate accumulating bacteria, and meanwhile, absorbing orthophosphate in a water body by cells; then, enabling the sewage to enter an aerobic region, decomposing the intercellular polymers in the polyphosphate accumulating bacteria to generate energy, and meanwhile absorbing the orthophosphate in the water body by the cells to form intercellular orthophosphate; and next, carrying out sludge and water separation in the sedimentation tank, discharging a supernatant solution from the water outlet, returning part of the sludge to the reactor, and discharging the other part of sludge serving as residual sludge. In order to overcome defects of an existing biological phosphorus removing process and device, the invention provides the novel phosphorus removing device and method which are small in floor area, high in phosphorus moving load, good in phosphorus removing effect, low in sludge discharge amount, low in carbon content, environmentally-friendly and economic.

The invention provides a wastewater biological treatment system based on a bio-contact oxidation process, and belongs to the technical field of wastewater biological treatment. The biological wastewater treatment system includes a processing pool, a water inlet zone, a promote zone, an aeration zone and a slurry and water separation zone; the water inlet zone, the promote zone, the aeration zone and the slurry and water separation zone are integrally arranged in the processing pool, the aeration zone is configured to include a plurality of sub partitions, and a biomembrane filler is placed in each sub partition; two or more of the three of an anoxic zone, an anaerobic zone and an aerobic zone are arbitrarily combined to form the plurality of sub partitions. The biological wastewater treatment system has the advantages of good denitrification effect, high efficiency of sewage treatment, less sludge deposit, wide applicable range, and biological multiplication process.

The disclosed water-drop aeration biopretreatment-ultrafiltration combined purification technique for drinking water comprises: first, building the multistage water-drop aeration biopretreatment device; then, pumping the raw water once to remove the most ammonia nitrogen by cascade water-drop oxygenation and biological contact oxidation pretreatment and convert the micro dissolved organic into microbe cell; filtering by the protective porous ceramic-aggregate pond; followingly, leading into the ultrafiltration membrane module to reduce the micro organic, ammonia nitrogen, particulate matter, most seston, colloid, and bacteria till meeting the drinking water quality standard. This invention belongs to green technique without coagulant or chlorine, reduces cost and land area, and has wide application for small-scale drinking water treatment.