ABR/ anoxic/aerobic biochemical process is used to treat aquaculture wastewater in this project.
Main processing unit
(1) Primary sedimentation tank: 1, with a size of 2.5 m× 1.0 m×2.5 m and a hydraulic retention time of 1.5 h, is an underground concrete structure. There are 1 sludge lifting pumps, with the model of 40WQ5- 10-0.55.
(2) Regulating tank: 1, with the size of 2.5 m×2.0 m×2.5 m, hydraulic retention time of 24 h and effective water depth of 2.0 m, which is an underground concrete structure. Two sewage lifting pumps, 1 standby, model 32wq3-12-0.37; Ventilation system LWBQ-80, 1 set, made of PVC. Shandong Beicheng environmental specialty deals with aquaculture wastewater.
(3)ABR tank: 1, with dimensions of 6.0 m×2.5 m×4.0 m, hydraulic retention time of 5 h, effective water depth of 3.5 m and COD load of 2.0 kg/(m3 d), is a semi-underground steel-concrete structure. Set combined packing 1 set, with a volume of 30 m3 and a model of ZV-φ150-100; 1 sludge reflux pump, model 40W5-10-0.55; 1 circulating pump, model 40gw10-10-0.75; 3 baffles, 2.5m×3.5m；; In size; 1 biogas collection system; 1 set of water distribution device.
(4) Anoxic tank 1 seat, with a size of 4.0 m×2.0 m×4.0 m and a COD load of1.2 kg/(m3 d), is a semi-underground steel structure and concrete structure. Set combined packing 1 set with a volume of 20 m3 and a model of ZV-φ150-100; 1 submersible mixer, model QJB- 1. 1.
(5) Intermediate sedimentation tank: 1, with a size of 2.0 m×2.0 m×4.0 m and a hydraulic surface load of1.0m3/(m2 h), which is a semi-underground steel-concrete structure. There are 1 sludge reflux pump, model 40GW5- 10-0.55.
(6) Aerobic tank: 1, the size is 6.5 m×4.0 m×4.0 m, the COD load is 0.60kg/(m3 d), and the ammonia nitrogen load is 0.10kg/(m3 d), which is a semi-underground steel structure and concrete structure. Set combined packing 1 set, with a volume of 72 m3 and a model of ZV-φ150-100; Two nitration liquid reflux pumps, 1 standby, model 40W5-10-0.55; 80 sets of lwbbq-2 15 high-efficiency aeration discs; 3 fans, 1 for use and 2 for standby, model RT-50, power 2.2kw.
(7) The secondary sedimentation tank: 1, with a size of 0.8 m×2.5 m×4.0 m, and a hydraulic surface load of1.0m3/(m2 h), is a semi-underground steel-concrete structure. Set 1 set of water inlet and outlet device, model LWCD-40；; ; There is a 1 sludge reflux pump with the model of 40GW5- 10-0.55.
(8) Coagulation sedimentation tank: 1, with a size of 2.5 m×2.5 m×4.0 m and a hydraulic surface load of 0.6m3/(m2 h), which is a semi-underground reinforced concrete structure. Set up 1 coagulation and sedimentation system; 1 sludge pump, model 40gw5-10-0.55; 1 set of central draft tube and outlet weir.
(9) Sludge concentration tank: 1, with a size of 2.5 m×2.5 m×4.0 m and a semi-underground steel-concrete structure. Set two screw pumps, 1 standby, model G30-1; 1 frame filter press, model xay35/800-ub; 1 set of central draft tube and outlet weir.