| 杜建阳,李楠,徐丕元,孙庭聪,范述捷,王月江,苏振华.6 000 t/a浆渣加工系统高浓废水的预处理工艺设计和应用[J].中国造纸,2026,45(4):174-180 |
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| 6 000 t/a浆渣加工系统高浓废水的预处理工艺设计和应用 |
| Design and Application of Pretreatment Process for High-concentration Wastewater from 6 000 t/a Pulping Residue Processing System |
| 收稿日期：2025-06-09 修订日期：2025-07-18 |
| DOI：10.11980/j.issn.0254-508X.2026.04.022 |
| 关键词: 浆渣 高浓废水 预处理 混凝澄清 |
| Key Words:pulping residue high-concentration wastewater pretreatment coagulation and clarification |
| 基金项目:云南省专家工作站项目（202605AF350071）；中轻集团科技创新基金项目-废纸制浆精筛渣回收技术及系统开发（ZQ2023YY-GX01）；高品质思茅松绒毛浆产品研发（202603AS090011-3）。 |
| 作者 | 单位 | 邮编 | | 杜建阳* | 1云南云景林纸股份有限公司,云南景谷,666499 | 666499 | | 李楠 | 2中国制浆造纸研究院有限公司, 北京,100102 | 100102 | | 徐丕元 | 1云南云景林纸股份有限公司,云南景谷,666499 | 666499 | | 孙庭聪 | 1云南云景林纸股份有限公司,云南景谷,666499 | 666499 | | 范述捷 | 2中国制浆造纸研究院有限公司, 北京,100102 | 100102 | | 王月江* | 2中国制浆造纸研究院有限公司, 北京,100102 | 100102 | | 苏振华* | 2中国制浆造纸研究院有限公司, 北京,100102 | 100102 |
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| 摘要:为处理6 000 t/a浆渣资源化利用过程产生的3 600 m³/d高浓有机废水（化学需氧量（CODCr）≈45 000 mg/L、悬浮物（SS）含量≈21 000 mg/L），在该废水并入现有废水处理系统前，本研究设计建造了一套基于混凝澄清技术的预处理工艺。实际运行结果表明，采用聚合氯化铁（PFC，Fe³⁺≥11%）、聚丙烯酰胺（PAM，质量分数0.1%）与黏土乳液（质量分数1.5%~1.7%）的复配絮凝剂，该预处理技术对高浓废水的CODCr去除率≥75%，SS去除率≥95%，出水CODCr≤918 mg/L、SS含量≤132 mg/L，满足原有废水处理系统的进水要求。同时，系统出水的可生化性（BOD5/CODCr）提升了约5%，有效解决了后续废水处理系统设备堵塞问题，使浅层气浮单元的化学品用量降低50%，并提高了污泥脱水效率。 |
| Abstract:To treat the 3 600 m3/d of highly concentrated organic wastewater (chemical oxygen demand (CODCr)≈45 000 mg/L， suspended solids (SS) content≈21 000 mg/L) generated during the resource recovery process of 6 000 t/a pulping residue， this study designed and constructed a pretreatment process based on coagulation and clarification technology， which prior to discharging into the existing wastewater treatment system. Operational results indicated that， using a flocculant blend comprising polyaluminum chloride (PFC， Fe3+≥11%)， polyacrylamide (PAM， mass fraction 0.1%)， and clay emulsion (mass fraction from 1.5% to 1.7%)， the pretreatment technology achieved a CODCr removal rate of ≥75% for the high-concentration wastewater， with a SS content removal rate of ≥95%. The effluent CODCr was ≤918 mg/L and SS content was ≤132 mg/L， meeting the influent requirements of the existing wastewater treatment system. Additionally， the biodegradability (BOD5/CODCr) of the effluent in the system improved by approximately 5%. It effectively resolved clogging issues in the subsequent wastewater treatment system， reduced chemical consumption in the shallow-bed flotation unit by 50%， and improved sludge dewatering efficiency. |
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