樟木化学机械浆废水处理系统效能下降成因分析与混凝预处理强化研究

钟天崎; 左剑恶

钟天崎,左剑恶.樟木化学机械浆废水处理系统效能下降成因分析与混凝预处理强化研究[J].中国造纸,2026,45(4):149-160

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樟木化学机械浆废水处理系统效能下降成因分析与混凝预处理强化研究

Study on the Cause Analysis of Performance Decline and Enhancement by Coagulation Pretreatment in Camphorwood Chemi-mechanical Pulping Wastewater Treatment System

收稿日期：2026-01-15 修订日期：2026-02-11

DOI：10.11980/j.issn.0254-508X.2026.04.019

关键词: 化学机械浆樟木制浆特征污染物废水处理厌氧强化

Key Words:chemi-mechanical pulp camphorwood pulping characteristic pollutants wastewater treatment anaerobic enhancement

基金项目:

作者	单位	邮编
钟天崎^*	1清华大学深圳国际研究生院,广东深圳,518055 2中国纸业投资有限公司,北京,100020 3湖南诚通天岳环保科技有限公司,湖南岳阳,414002	414002
左剑恶^*	1清华大学深圳国际研究生院,广东深圳,518055 4清华大学环境学院,环境模拟与污染控制国家重点联合实验室,北京,100084	100084

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摘要:本研究追踪了湖南某造纸厂2021—2024年APMP化学机械浆樟木占比变化与废水处理系统厌氧、好氧及深度处理等关键工段COD等指标的响应特征，分析了樟木制浆废水对厌氧处理单元的抑制效应。结果表明，樟木占比从4.24%升至12.81%期间，厌氧系统COD_Cr容积负荷超设计值29%，进水COD_Cr浓度上升16.5%。发光细菌毒性测试证实，全樟木化学机械浆废水毒性最强，且毒性随COD浓度增加而增强；在相同COD_Cr负荷下，樟木制浆废水占比从5%增至15%时，厌氧COD去除率呈剂量依赖性下降。在此基础上，本研究通过引入厌氧前端混凝沉淀预处理验证其源头提质增效效果，在优化条件下（PAC用量5 g/L与适宜PAM），混凝预处理可使进水COD_Cr和SS分别降低25.9%和28.7%，后续厌氧单元COD_Cr去除效率提高14.5%。

Abstract:The response characteristics of key indicators such as CODin the anaerobic， aerobic and advanced treatment units of a pulp and paper mill in Hu’nan province from 2021 to 2024 were tracked in this study， to analyze the inhibitory effect of camphorwood process wastewater on the anaerobic treatment unit in relation to the changes in camphorwood consumption during APMP pulping. The results showed that as the proportion of camphorwood increased from 4.24% to 12.81%， the COD_Cr volumetric loading rate of the anaerobic system exceeded the design value by 29%， and the influent COD_Cr concentration increased by 16.5%. Luminescent bacteria toxicity tests confirmed that the 100% camphorwood chemimechanical pulping wastewater exhibited the highest toxicity， and the toxicity increased with the increasing COD concentration. Under identical COD_Cr loading conditions， the anaerobic COD_Cr removal efficiency decreased in a dose-dependent manner when the camphorwood pulping wastewater proportion increased from 5% to 15%. On this basis， the efficacy of introducing coagulation pretreatment upstream of the anaerobic unit for the influent quality improvement was evaluated in this study. Under the optimized conditions (5 g/L PAC with appropriate PAM)， the coagulation pretreatment reduced the influent COD_Cr and SS by 25.9% and 28.7%， respectively， and increased the subsequent anaerobic COD_Cr removal efficiency by 14.5%.

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