MBBR—AMBBR—MBBR组合工艺处理高氨氮化工废水

Treatment of high ammonia-nitrogen chemical wastewater by MBBR-AMBBR-MBBR combined process

采用移动床生物膜反应器(MBBR)—厌氧移动床生物膜反应器(AMBBR)—MBBR组合工艺处理高氨氮化工废水。反应器采用几何构型优化、比表面积大的新型YD-25生物载体和DNF-203硝化细菌,实现了同步硝化和反硝化,强化了脱氮能力。采用投加菌种和排泥的方式,经27 d的驯化培养即完成了反应器的挂膜启动。试验结果表明:最佳操作条件为HRT 8 d、MBBR中DO 3 mg/L、进水pH 8.0;在进水COD 2 840～7 437 mg/L、ρ(氨氮)92～179 mg/L、TN 148～258 mg/L、pH 6～8的条件下,出水指标均值为COD 352 mg/L、ρ(氨氮)21.2 mg/L、TN 36 mg/L、pH 7.4,满足排放要求。

The moving bed biofilm reactor (MBBR)-anaerobic moving bed biofilm reactor (AMBBR)-MBBR combined process was used to treat the high ammonia-nitrogen chemical wastewater. The reactors adopted a new type of biological carrier YD-25 with optimized geometric configuration and larger surface area and nitrifying bacteria DNF-203,which achieved synchronous nitrification and denitrification,and enhanced denitrification ability. The bio-film culturing and start-up of the reactor were accomplished after 27 days of acclimation with inculation and sludge discharge. The test results showed that:The optimum operational conditions were HRT 8 d,DO in MBBR 3 mg/L and influent pH 8.0;Under the conditions of influent COD 2 840-7 437 mg/L,ρ(NH 3-N)92-179 mg/L,TN 148-258 mg/L and pH 6-8,the average water quality indexes of effluent were COD 352 mg/L,ρ(NH 3-N)21.2 mg/L,TN 36 mg/L and pH 7.4,respectively,which met the emission requirements.