SBR生物技术处理竹浆造纸黑液的研究

A Study on the Treatment of Black Liquor from Bamboo Pulping Process with Sequencing Batch Reactor Biological Technique.

通过循序间歇式活性污泥法（ＳＢＲ）处理可使经酸析木质素后所得黑液中的ＢＯＤ５和ＣＯＤ显著减少，当进水中ＣＯＤ浓度为１０９０—１１７０ｍｇ／Ｌ时，ＢＯＤ５去除率为７０％—８３％，ＣＯＤ去除率为５４．５％—６３％，出水中ＢＯＤ５和ＣＯＤ的浓度分别为７６—１０１ｍｇ／Ｌ和４１９—５００ｍｇ／Ｌ．内电解与ＳＢＲ联合对黑液的处理更为有效．当进水ＣＯＤ浓度为１０４６—１１００ｍｇ／Ｌ时，ＢＯＤ５和ＣＯＤ去除率分别为６７％—６８％和７１．４—７６．９％，出水ＢＯＤ５和ＣＯＤ浓度分别达３３—４８ｍｇ／Ｌ和２４２—３１５ｍｇ／Ｌ，符合ＧＢ８９７８－８８国家排放标准．内电解显著提高了后续ＳＢＲ处理的效果．研究了ＣＯＤ一级降解反应动力学，得到了动力学常数Ｋ１和不可生化降解的ＣＯＤ浓度．模拟数据与试验数据吻合良好．

In this paper,the treatment of bamboo pulping black liquor in which lignin has been separated by acid with sequencing batch reactor (SBR) was investigated. The experimental results show ed that BOD 5 and COD in black liquor is reduced remarkably with the treatment of SBR,BOD 5 removal rate is 70%—83%,COD removal rate is 54.5%—63%,the effluent BOD 5 and COD after the treatment are 76—101 mg/L and 419—500mg/L respectively when influent COD is 1090—1170mg/L. The technology of combining internal decomposition with SBR is more efficient for treatment of black liquor,BOD 5 and COD removal rate are 67%—68% and 71.4%—76.9% respectively,the effluent BOD 5 and COD from this system are 33—48mg/L and 242—315mg/L respectively when influent COD is 1046—1100mg/L . It is in keeping with GB8978 88 effluent standard. The internal decomposition remarkably increase the effectiveness of follow up SBR treatment. In addition, the kine tics of first order degradation reaction of COD was studied. The kinetic constant and undegradable COD had been calculated. Simulated data tally with experimental data well.