[1]孙禹,刘亚丹,顾超,等.超声沉淀/气浮/微流控过滤对机修废水的预处理效能[J].中国给水排水,2025,41(13):18-25.
　SUNYu,LIUYa-dan,GUChao,et al.Ultrasonic Sedimentation-Air Flotation-Microfluidic Filtration for Pretreatment of Machine Maintenance Flushing Wastewater：Performance and Removal Mechanism[J].China Water & Wastewater,2025,41(13):18-25.
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超声沉淀/气浮/微流控过滤对机修废水的预处理效能

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第41卷 期数: 2025年第13期 页码: 18-25 栏目: 出版日期: 2025-07-01
Title:
Ultrasonic Sedimentation-Air Flotation-Microfluidic Filtration for Pretreatment of Machine Maintenance Flushing Wastewater：Performance and Removal Mechanism
作者:
孙禹1， 刘亚丹1， 顾超1， 陶晓霞1， 闫志扬2， 刘上游2， 秦晋一1,2
（1.国家能源集团 神东煤炭集团公司，内蒙古 鄂尔多斯 017209；2.长安大学 建筑工程学院，陕西 西安 710054）
Author(s):
SUN　Yu1， LIU　Ya-dan1， GU　Chao1， TAO　Xiao-xia1， YAN　Zhi-yang2， LIU　Shang-you2， QIN　Jin-yi1，2
（1. Shendong Coal Group Co. Ltd.， China Energy Investment Group， Ordos 017209， China； 2. School of Civil Engineering， Chang’an University， Xi’an 710054， China）
关键词:
机修废水;  超声预处理;  气浮;  微流控过滤;  含油量;  铁;  浊度
Keywords:
machine maintenance flushing wastewater;  ultrasonic pretreatment;  air flotation; microfluidic filtration;  oil content;  iron;  turbidity
摘要:
机修废水的水质波动大，含油量高达103.2 mg/L，铁含量为3.5 mg/L，浊度为800 NTU，COD为10 706 mg/L，单一气浮无法有效去除污染物，造成后端生化污泥大量死亡。为此，采用超声沉淀/气浮/微流控过滤复合工艺作为生化反应的预处理，以降低后端碳负荷。结果表明，超声沉淀通过声团聚使浊度去除率达89.45%。气浮中加入25%的次氯酸盐，氧化破坏“油包水”结构，对油的去除率达53.74%。同时Fe2+被氧化为Fe3+并形成Fe（OH）3沉淀，铁去除率达89.73%。微流控过滤利用电极电解产生更多不溶性絮体，裹挟COD沉淀去除率达68.05%。在长期运行过程中，含铁量、含油量和浊度较改造前分别下降了96.3%、92.5%和 98.5%，BOD5/COD由0.15提升到0.40。污水处理厂整体出水水质达到《城市污水再生利用 工业用水水质》（GB/T 19923—2005）中洗涤用水要求。预处理总投资为131万元，处理成本为3.80 元/m3，较之前降低41%。该复合工艺的开发为机修废水的生化预处理提供了新的技术思路。
Abstract:
The water quality of machine maintenance flushing wastewater fluctuates greatly, with oil content of up to 103.2 mg/L, iron content of 3.5 mg/L, turbidity of 800 NTU, and COD of 10 706 mg/L.Single air flotation cannot effectively remove these pollutants, resulting in deaths of a large number of acitivated sludge in subsequent biochemical tanks. This study proposed a combined process of ultrasonic sedimentation,air flotation, and microfluidic filtration as a pretreatment strategy for subsequent biochemical processes. The results showed that ultrasonic precipitation achieved a turbidity removal rate of 89.45% through acoustic agglomeration. Adding 25% hypochlorite to air flotation could oxidize and destroys the “water in oil” structure, resulting in a removal of 53.74% for oil. At the same time, Fe2+ was oxidized to Fe3+，and form Fe(OH)3 precipitate, with an iron removal of 89.73%. Microfluidic filtration utilized electrode electrolysis to produce more insoluble flocs, with COD sedimentation removal reaching 68.05%. During long?term operation, the iron content, oil content, and turbidity decreased by 96.3%, 92.5%, and 98.5% respectively compared to before the transformation, and the BOD5/COD increased from 0.15 to 0.40. The overall effluent quality of the sewage treatment plant met the requirements for washing water in the Reuse of Urban Recycling Water—Water Quality Standard for Industrial Uses (GB/T 19923-2005). The total investment for pretreatment was 1.31 million yuan, and the treatment cost was 3.80 yuan/m3, which was 41% lower than before. The development of this process provides a new technological approach for the biochemical pretreatment of machine maintenance flushing wastewater.
更新日期/Last Update: 2025-07-01