6000t/a浆渣加工系统高浓废水的预处理工艺设计和应用

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关键词：浆渣；高浓废水；预处理；混凝澄清中图分类号：X793 文献标识码：A DOI： 10.11980/j.issn.0254-508X.2026.04.022

Designand ApplicationofPretreatmentProcessforHigh-concentration Wastewaterfrom6 Ooot/a Pulping Residue ProcessingSystem

DU Jianyang'LI Nan²XU Piyuan'SUN Tingcong'FAN Shujie²WANG Yuejiang2* SU Zhenhua*

（1.Yunnan YunjingForest&PaperCo.，Ltd.，Jinggu，YunnanProvince，666499；2.ChinaNationalPulpandPaperResearch Institute Co.，Ltd.，Beijing，100102） （ E-mail：wyj0078@163.com；suzhenhua@cnppri.com）

Abstract：To treat the 3600m3/d of highly concentrated organic wastewater （chemical oxygen demand （COD ）～45 000 mg/L，suspended solids （SS） ΔCrcontent～21 000mg/L ）generated duringtheresourcerecoveryprocessof6OOOt/a pulping residue，thisstudydesignedandconstructedapretreatmentprocesssedatrtseetalindicated that，using a flocculant blend comprising polyaluminum chloride （PFC，Fe 3+311% ），polyacrylamide （PAM，mass fraction 0.1% ），and clayemulsion （mass fraction from 1.5% to 1.7% ），the pretreatment technology achieved a COD removal rate of ⩾75% for the high-concentration crwastewater，with a SS content removal rate of ⩾ 5 % . The effluent COD was ⩽ 918 mg/L and SS content was ⩽132mg/L ，meeting the influent crrequirements of the existing wastewater treatment system.Additionall，the biodegradability （BOD5/COD Cr ）of the effluent in the systemimproved by approximately 5% . It effctively resolved clogging issues in the subsequent wastewater treatment system，reduced chemicalconsumption in the shallow-bedflotation unit by 50% ， and improved sludge dewatering efficiency.

Key words：pulping residue; high-concentration wastewater; pretreatment; coagulation and clarification

制浆造纸工业是资源循环型产业的重要组成部分，在推动绿色低碳发展方面潜力显著。（剩余7670字）