超高盐含甲醇气田水生物接触氧化处理技术研究
收稿日期: 2024-12-10
网络出版日期: 2025-10-27
基金资助
国家自然科学基金青年科学基金项目(52300085);中央高校基本科研业务费专项基金项目(JKB01241707)
Study on biological contact oxidation treatment technology of ultra-hypersaline methanol-containing gas field produced water
Received date: 2024-12-10
Online published: 2025-10-27
新疆塔里木油气田采出水盐度高达10%~20%，还含有防冻剂甲醇。为实现水及盐的资源化利用，亟需开发出绿色经济的有机物降解工艺。生物接触氧化（BCOR）技术具有盐度耐受高等优势，已被应用于含甲醇气田水（3.9%盐度）处理过程，但更高盐度体系处理效能尚有待探究。以20%盐度甲醇配水为处理对象，利用反应器R1与R2分别探究直接启动与盐度梯度提升驯化策略下BCOR的处理效能。结果发现，R1针对125 mg/L TOC的去除率在37.5%~77.6%波动，运行效能差。R2在11%~13%盐度下，针对500 mg/L TOC的去除率稳定在85.7%~93.6%；盐度提升至15%以上时，污泥上浮流失，去除率下降至61.6%~81.8%且甲醇挥发占比大。13%盐度时，Methylophaga属和Halomonas属占主导；盐度提升至15%以上，Methylophaga属丰度显著下降。总体而言，盐度梯度提升驯化策略可显著提升生物接触氧化反应器对超高盐废水的处理效能，但面对极高盐度废水（17%~20%），仅采用驯化手段调节群落结构效果有限。该研究可为超高盐含甲醇废水生物处理提供参考。
康建明 , 韩昫身 , 金艳 , 于建国 . 超高盐含甲醇气田水生物接触氧化处理技术研究[J]. 无机盐工业, 2025 , 57(10) : 98 -102 . DOI: 10.19964/j.issn.1006-4990.2024-0661
The salinity of produced water from the Tarim oil and gas field in Xinjiang ranged from 10% to 20% and the wastewater contained the antifreeze methanol.To realize the resource utilization of freshwater and salt，it is essential to establish a sustainable and economic method for the degradation of organics.Due to the excellent salinity tolerance，biological contact oxidation reactor（BCOR） technology has been utilized to treat methanol-containing gas produced water（3.9% salinity）.However，the treatment efficiency under higher salinity conditions is still unclear.In this study，the synthetic methanol wastewater with 20% salinity was used as target wastewater.R1 and R2 were conducted to evaluate the treatment efficiency using direct start-up strategy and gradient salinity-elevation acclimation strategy，respectively.The results showed that the TOC removal efficiency of R1 was varied at 37.5%~77.6% with the influent TOC of 125 mg/L，reflecting its poor performance.The TOC removal efficiency of R2 was remained stable at 85.7%~93.6% with the influent TOC of 500 mg/L under salinities of 11%~13%，however，it was decreased to 61.6%~81.8% accompanied by significant methanol volatilization under salinities of over 15%，with the floatation and loss of sludge.Bacterial community analysis revealed that genera Methylophaga and Halomonas predominated at 13% salinity，while the abundance of genus Methylophaga decreased significantly with salinity exceeding 15%.Overall，the gradient salinity-elevation acclimation strategy significantly enhanced the performance of BCOR in treatment of ultra-high salinity wastewater.However，the effect of this strategy was limited in treatment of extremely high salinity wastewater（17%~20%）.This study provided reference for the biological treatment of ultra-hypersaline methanol-containing wastewater.
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