The Basic Research For Application New Anaerobic-Aerobic Biological Fluidized Bed Reactors

In recent years,the contradiction between the surge in industrial wastewater discharge and the increasing tensions of land resources has threatened the process of sustainable development of China.However,the current wastewater treatment facilities are mostly concrete structures with large footprint.Biofluidized bed reactor technology has been paid attention to by industry because of its small footprint,high efficiency and high organic nitrogen and nitrogen removal technology.However,the biological fluidized bed reactor technology-based engineering practice is rare,the corresponding process parameters less reported in the papers,hindering the application of the technology.In this paper,we use the self-developed spiral symmetry stream anaerobic fluidized bed bioreactor(SSSAB)and the air-lift external circulation vortex enhancement nitrogen removal fluidized bed bioreactor(reactor I)to treat the traditional chinese pharmaceutical(TMC)wastewater.To carry out the new and efficient biofluidized bed reactors technology application of basic research.The experimental with TMC as the treat object,and contract with IC reactor through removal efficiency,running load,bedtime sludge temporal and spatial characteristics analysis studied the pilot operating performance and the optimum operating parameters of SSSAB at room temperature;Through hydraulic impact test,concentration impact test and dynamic simulation explored the potential of SSSAB pilot operation.The experimental with TMC waste water anaerobic treatment effluent water as the treat object,and contract with traditional airlift internal loop reactor(reactor I)through removal efficiency,stability of operation,changes in extracellular polymer content studied the operating performance of the reactor I in the actual wastewater treatment at room temperature,and explored the possibility of enhanced performance of the reactor I is explored by adding biofilm fillers.Two experiments have the following conclusions:1.SSSAB at room temperature treatment of proprietary Chinese medicine wastewater test performance:a?(21.37 ± 0.96)kg COD /(m3 · d),VRR was up to(19.67 ± 0.68)kg COD /(m3 · d),and the performance of SSSAB was better than that of IC anaerobic reactor(SSSAB)Sludge load can reach kg COD /(kg MLSS·d),the overall COD removal rate of the reactor is more than 90%,which is superior to the traditional IC anaerobic reactor.The optimum parameters for SCPAB treatment of COD were 5000 ~ 6000 mg / L and HRT was 6 h.b?The temporal and spatial characteristics of SSSAB bed sludge at room temperature are superior to those of IC anaerobic reactor.In time,SSSAB monitors the sludge concentration and sludge concentration increase with the run time,(0.289 ± 0.0024 kg COD /(kg MLSS · d))is superior to that of IC anaerobic reactor.In the space,the sludge concentration of SSSAB bed is gradually decreasing from bottom to top,and the whole concentration is high(34 ~ 61 g / L)is one of the features that SSSAB achieves high performance when HRT is 6 h.c?The SSSAB load impact test and the kinetic simulation results show that the SSSAB resistance load(the product of the impact concentration and the impact time)can be as high as 72.00(kg COD · h)/ m3 at room temperature,and the water flow up to 4.3 m / H,the performance of retained sludge is also stronger than that of IC reactor.The dynamic simulation shows that the maximum COD load rate of SSSAB can reach 43.42 kg COD /(m3 · d).2.Study on the Application of Air-purifying External Circulation Aerobic Fluidized Bed Reactora?start the run phase,the reactor I treatment of proprietary Chinese medicine anaerobic wastewater performance slightly better than the reactor II.The removal rates of COD,TN and NH4 +-N in reactor I were 82.9%,83.1%,88.6%,CVRR reached 1.03 ± 0.06 kg COD /(m3 · d),and NVRR reached 0.129 ± 0.019)Kg TN /(m3 · d),slightly better than the corresponding value achievable by Reactor II.At this stage,the overall stability of the reactor I is slightly better than that of the reactor II;the stability of the reactor I under the conditions of the operating conditions is much better than that of the reactor II.b?During the stable operation phase,the performance of Reactor I in the treatment of anaerobic wastewater is better than that of Reactor II,which can meet the requirements of "Standard for the discharge of water pollutants for Chinese medicine"(GB21906-2008)Concentration can not meet this standard.The concentration of COD,TN and NH4 +-N in reactor I was 40.9mg / L,3.6 mg / L and 3.6 mg / L,respectively.The removal rates were 6%,4.5% and 4.2% higher than that of Reactor II,respectively.At this stage,the stability of the reactor I is also superior to that of the reactor II.c?At the end of the stable operation phase,the vortex flow field in the reactor I provides a stronger hydraulic shear force than the reactor II,which enhances the mass transfer rate and also makes the total amount of EPS in the sludge and the PN Increase so that the sludge structure is more stable,and the denitrification efficiency is enhanced.d?The results of the operation of the film are as follows: The addition of the suspension filler enhances the operational performance of the reactor I.The results show that the anaerobic-aerobic biological fluidized bed process of SSSAB + Reactor I has the ability to reach the discharge standard of TMC wastewater treatment at normal temperature during the stable operation stage.The content of this paper can also be the reactor based process and SSSAB? reactor I ‘s subsequent engineering provides data reference and operational guidance.