MBBR处理猪场废水厌氧消化液的研究
Study on treatment of digested piggery wastewater by moving bed biofilm reactor
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摘要: 采用移动床生物膜反应器（MBBR）处理猪场废水厌氧消化液，考察了水力停留时间（HRT），进水COD和NH3-N浓度对反应器处理效果的影响。结果表明，在温度为20～30℃，填料填充比为50%，进水COD和NH3-N浓度分别为1 016 mg/L和496 mg/L条件下，当HRT为12.5 h时，COD和NH3-N去除率可分别达到62%和77%，猪场废水厌氧消化液中可生物降解性有机物基本得到去除，当HRT增至23.8 h时，COD和NHAbstract: Moving bed biofilm reactor(MBBR) was used to treat digested piggery wastewater,the influences of hydraulic retention time (HRT),COD and NH3-N concentrations of influent on the treatment effect were investigated. The results showed that under the conditions of temperature =20～30℃,carrier volumetric ratio =50%,the influent concentration of COD=1 016 mg/L, the influent concentration of NH3-N=496 mg/L, when HRT was 12.5 h, the removal rates of COD and NH3-N were 62% and 77% respectively, most of biodegradable organic substances in digested piggery wastewater were removed, when HRT extended from 12.5 h to 23.8 h, the removal rates of COD and NH3-N were 64% and 86% respectively, the effluent concentrations of COD and NH3-N were 368 mg/L and 70 mg/L,respectively，meeting the standards of《Discharge Standard of Pollutants for Livestock and Poultry Breeding》（GB18596-2001）.
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Key words:
- moving bed biofilm reactor /
- digested piggery wastewater /
- COD /
- NH3-N
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