麦草两段预浸渍化机浆废水的污染物特征和发生量  

Pollution Characteristics and Loads in Wastewater of Chemimechanical Pulp of Wheat Straw by Two-stage Impregnated Process

作　　者：张华兰[1,2,3,4] 房桂干[1,2,3,4,5] 施英乔[1,2,3,4] 沈葵忠[1,2,3,4,5] 冉淼[1,2,3,4] 韩善明[1,2,3,4] 丁来保[1,2,3,4,5] 盘爱享[1,2,3,4,5] 

机构地区：[1]中国林业科学研究院林产化学工业研究所 [2]生物质化学利用国家工程实验室 [3]国家林业局林产化学工程重点开放性实验室 [4]江苏省生物质能源与材料重点实验室,江苏南京210042 [5]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《生物质化学工程》2016年第5期39-44,共6页Biomass Chemical Engineering

基　　金：“十二五”国家科技支撑计划资助(2014BAD02B02)

摘　　要：对不同碱用量两段预浸渍麦草化学机械制浆(CTMP)废水的污染特征进行分析,探讨了制浆得率与污染负荷之间的关系。研究表明:采用两段Na OH浸渍,当碱总用量为3%~5%时,可以在较低的磨浆能耗得到质量指标良好的纸浆,制浆得率为73.1%~78.9%,产生的化学需氧量(COD)为270.5~446.0 kg/t,5日生化需氧量(BOD5)为181.3~228.2 kg/t,悬浮物(SS)为47.62~124.30 kg/t。此麦草CTMP制浆废水的BOD5/COD值在0.422~0.466之间,属于可生化性较好的有机废水,且mBOD5∶mN∶mP的结果表明采用厌氧+好氧的生化处理,反应体系的N元素和P元素均可满足微生物的需要,无需另外补充。且随着碱总用量的增加,麦草CTMP制浆得率下降,而其相应的污染负荷随之增加。在碱总用量为0~8%时,COD污染发生量(L)与制浆得率(Y)关系方程式为L=5 884-11 670Y+5 800Y^2,R^2=0.995。The pollution characteristics of wastewater from the two-stage impregnated process of wheat straw chemimechanical pulp （CTMP） with different alkali charges were analyzed comprehensively.The relationships of the pulp yield and pollution load were discussed.The results showed that good pulp properties could be obtained at low refining energy consumption with two-stage NaOH impregnation process while the total alkali charges in the whole pulping process were 3 % - 5 % with the pulp yields of 73.1% - 78.9 %.Meanwhile, the produced wastewater had the chemical oxygen demand（COD） pollution load of 270.5-446.0 kg/t, the five days＇ biochemical oxygen demand（ BOD5 ） pollution load of 181.3- 228.2 kg/t and the suspended solid（SS） pollution load of 47.62- 124.30 kg/t. The BODs/COD ratios of 0.422-0.466 meaned that the wastewater was easy to be treated by the biochemical treatment process.By the suitable ratio of mBOD5：mN ：mp of the wastewater,its N and P element were enough to meet the needs of microorganism in the anaerobic-aerobic biochemical treatment.With the increase of the alkali charge, the yield of wheat straw CMP pulps declined,while the corresponding pollution loads increased.The relation formula of the pulping yield（Y） and COD pollution loads （L） was L = 5 884-11 670Y＋5 800Y2, R2= 0.995 with the total alkali charge of 0-8 %,

关 键 词：麦草 化学预浸渍 CTMP制浆废水 污染物特征 制浆得率 

分 类 号：X793[环境科学与工程—环境工程]