Sewage treatment device capable of recovering methane and ammonia simultaneously

[0020] Example 1 A sewage treatment device that simultaneously realizes the recovery of biogas and ammonia according to the present invention includes a reactor body, and the inner cavity of the reactor body is divided into successively connected upward flow reactors through vertical baffles. Oxygen sludge bed unit 1 and baffle ion exchange unit 2, the up-flow anaerobic sludge bed unit 1 communicates with the frontmost compartment of the baffle ion exchange unit 2 through a water outlet, and the The upflow anaerobic sludge bed unit 1 from bottom to top is a reaction zone 11 for filling anaerobic granular sludge, a three-phase separation zone equipped with a three-phase separator 12, a sedimentation zone 13 and a collector with an air outlet 141. The gas chamber 14, the bottom of the reaction zone 11 is provided with a water inlet 111 and a mud outlet 112; the gas collection chamber 14 is surrounded by the periphery of the three-phase separation zone, and the three-phase separator 12 is arranged in the sedimentation zone The bottom of 13; the baffle ion exchange unit 2 is divided into four independent compartments arranged in the horizontal direction by three vertically placed partition baffles 25, and each of the independent compartments is baffled by the partition The plate 26 forms a pattern in which the downflow area 27 is in the front and the upflow area 28 is connected in series alternately, wherein the lower end of the partition baffle 25 is fixedly connected to the bottom of the reactor body, and the upper end is ion-exchanged with the baffle plate of the reactor body. There is a gap at the top of the unit 2; the two ends of the partition baffle 26 are respectively left with a gap between the top and the bottom of the baffle ion exchange unit 2; the upward flow area 28 is filled with zeolite ion exchange The bottom is provided with a perforated plate 261; the upper part of the side wall of the most terminal compartment of the baffle ion exchange unit 2 is provided with a total discharge port 29.

[0021] Further, the reactor body is closed; the top of the reactor body is provided with a removable cover; the bottom of the three-phase separator 12 is provided with a gas seal 121; the periphery of the sedimentation zone 13 is provided with an overflow weir 131, a water outlet 132 is provided at the bottom of the overflow weir 131;

[0022] Further, the baffle ion exchange unit 2 is divided into a first compartment 21 , a second compartment 22 , a third compartment 23 and a fourth compartment 24 by three separating baffles 25 from left to right. ; The first compartment 21, the second compartment 22, the third compartment 23 and the fourth compartment 24 are respectively divided into the downflow area 27 in the front and the upflow area by the corresponding vertical partition baffles 26. The structure with the flow area 28 behind, the front part of the first compartment 21 of the baffle ion exchange unit 2 is the downflow area 27, and the rear part of the fourth compartment 24 is the upflow area 28, which ensures that the anaerobic sludge sheet from the upward flow The flow path of the liquid flowing out of the element 1 in the baffle ion exchange unit 2 is a serpentine path.

[0023]Further, the reactor body is in the shape of a cuboid, the volume ratio of the up-flow anaerobic sludge bed unit 1 and the baffle ion exchange unit 2 is 1:1.8-2.2; the up-flow anaerobic sludge The ratio of length, width and height of mud bed unit 1 is 1.2~1.4:1:4~5; the ratio of length, width and height of the baffle ion exchange unit 2 is 2.6~2.8:1:4~5 ; The volume ratio of the four independent compartments from left to right in the baffle ion exchange unit 2 is 1.5-1.8:1.2-1.4:1-1.3:1.

[0024] Further, in the baffle ion exchange unit 2, the height of the separation baffle 25 connected to the bottom of the reactor body and the ratio of the height of the total discharge port 29 from the bottom of the reactor body to the height of the device are all 0.7 to 0.8:1; The ratio of the height of the partition baffle 27 from the bottom and top of the reactor body to the height of the reactor body in the independent compartment is 1:8 to 9; the perforated plate 261 is square, and the perforated plate The diameter of the circular holes distributed on the 261 is 0.5 to 0.8 mm.

[0025] Further, the granular zeolite is one or both of mordenite and clinoptilolite; the particle size of the zeolite is 1.0-3.2 mm; the volume of the zeolite filled in the upflow area in the independent compartment accounts for 1 liter 70% to 80% of the volume of the flow area.

[0026] Further, the left bottom of the reaction zone is provided with a water inlet pipe, and the middle bottom is provided with a mud discharge port.

[0027] The utility model relates to a sewage treatment device which can realize the recovery of biogas and ammonia at the same time, which can be made of plexiglass or steel plate. The working process is as follows: after the domestic sewage is treated in the primary sedimentation tank, it flows to the up-flow anaerobic sludge bed unit 1, the anaerobic granular sludge is fully mixed and contacted with the sewage, and the microorganisms in the sludge decompose the organic matter in the sewage and convert it into It is biogas, which is continuously released and merged in the form of micro-bubbles, and finally forms larger bubbles. The suspended sludge layer formed by the agitation of biogas in the upper part of the up-flow anaerobic sludge bed unit 1 enters the three-phase separator together with water. 12. The biogas diffuses around through the air seal 121 at the bottom of the three-phase separator 12, enters the gas collection chamber 14 through the water layer, is collected by the gas collection chamber 14 and is discharged through the gas outlet 141; the solid-liquid mixture is entrained into the precipitation zone 13 , the sludge in the sewage will return to the reaction zone 11 under the action of gravity after continuous adhesion. The organic nitrogen in the digested sewage is ammoniated to NH 4 + , the treated sewage overflows through the overflow weir 131 of the sedimentation zone 13 , and then flows to the baffle ion exchange unit 2 by itself. The effluent treated by the upflow oxygen sludge bed unit 1 first passes through the downflow area 27 in the first compartment 21 under the action of the baffle plate, and then enters the upflow area filled with zeolite through the perforated plate 261. NH 4 + After the zeolite ion exchange and adsorption are removed, the sewage is repeatedly circulated in the baffle ion exchange unit 2, and the NH 4 + Continuously lowering, the treated water is discharged through the total discharge port 29 on the upper right side of the baffle ion exchange unit 2 . When the ion exchange of the zeolite in the upflow zone 28 reaches saturation, the zeolite is taken out, and the nitrogen therein is recovered and utilized by utilizing the reversibility of its adsorption.