EGSB反应器处理半化学草浆制浆废水的研究

Study on the Treatment of Effluent from Semi-chemical Straw Pulping with Expanded Granule Sludge Bed Reactor

对采用厌氧膨胀颗粒污泥床（EGSB）反应器处理的半化学草浆制浆废水的运行状况进行了分析,结果表明,反应器以VLR（容积负荷）2.192 kg COD/（m^3·d）进行启动,在以浓度和流量逐渐提升VLR的过程中,CODCr去除率一直保持在70%以上;最小水力停留时间（HRT）可缩短至4.9 h,最大VLR可达到25.820 kg COD/（m^3·d）,CODCr去除率稳定在68.8%－78.0%范围内;当出水pH值高于进水时,出水回流可以减少调节进水pH值的用碱量。

The study results of the treatment of effluent from semi-chemical straw pulping with expanded granule sludge bed（EGSB） reactor indicated that the EGSB reactor started-up at the volume loading rate of 2.192 kg COD/（m^3·d）,its CODCr removal rate maintains above 70% in the process of increasing volume loading rate gradually.The minimum HRT can be shorten to 4.9 h,the maximum VLR can be reached to 25.820 kg COD/（m^3·d） and the CODCr removal rate can be kept on 68.8%-78.0%;The consumption of alkali using for influent pH adjustment can be reduced by circulating the effluent when the pH value of the effluent is higher than that of the influent.