基于Petri网与BAT的造纸行业排放限值仿真

以OPMSE仿真计算造纸污水中COD,BOD5,NH3-N排放质量浓度为研究对象,查询及调研清河流域典型造纸行业产生的污水中COD,BOD5,NH3-N质量浓度范围,通过OPM SE仿真计算,结果表明:置信水平为99%时,COD置信区间为(34.09,41.84),BOD5置信区间为(6.65,8.40),NH3-N置信区间为(6.28,7.34);最佳出水各指标为ρ(COD)=12.79 mg/L,ρ(BOD5)=2.62 mg/L,ρ(NH3-N)=3.33 mg/L,最差出水各指标为ρ(COD)=70.47 mg/L,ρ(BOD5)=14.51 mg/L,ρ(NH3-N)=10.22 mg/L.将仿真结果与现有排放标准对比,拟定造纸行业的污染物直接排放限值为ρ(COD)=45 mg/L,ρ(BOD5)=9 mg/L,ρ(NH3-N)=8 mg/L.

Simulation of Emission Limits for Paper-Making Industry Based on Petri Net and BAT

Through the simulation and calculation of object Petri net modeling and simulation environment (OPMSE) for the emission mass concentrations of COD， BOD₅ and NH₃-N in waste water from paper-making industry， the range of COD， BOD₅ and NH₃-N mass concentrations in typical paper-making industry were inquiried and investigated in Qinghe basin. The results show that when the confidence level is 99%， the confidence interval of COD is (34.09， 41.84)， the confidence interval of BOD₅ is (6.65， 8.40)， and the confidence interval of NH₃-N is (6.28， 7.34). The mass concentration of the optimum effluent is ρ(COD)=12. 79mg/L， ρ(BOD₅)=2.62mg/L， ρ(NH₃-N)=3. 33mg/L， while the mass concentrations of the worst effluent are ρ(COD)=70.47mg/L， ρ(BOD₅)=14.51mg/L， ρ(NH₃-N)=10.22mg/L. Then making a comparison between the emission standards and simulation results are got. The direct emission limits of the paper-making industry are ρ(COD)=45mg/L， ρ(BOD₅)=9mg/L， ρ(NH₃-N)=8mg/L.