Biodegradation-assisted removal of sulfur-based odor compounds in rural drinking water using durable chitosan/polyvinyl alcohol biochar aerogels

IF 9 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2024-11-30 DOI:10.1016/j.biortech.2024.131915

Jingyu Shu, Chen Chen, Chunyan Yang, Xiaoyu Ren, Guijing Chen, Wenjie Wang, Guanyu Zhou, Qidong Wu, Peng Tang, Baicang Liu

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Abstract

Rural drinking water often suffers from unpleasant odors like dimethyl sulfide (DMDS) and dimethyl trisulfide (DMTS) due to poor raw water quality and limited treatment options. This study introduces durable chitosan/polyvinyl alcohol (PVA) biochar aerogels-supported bioflims in ultrafiltration (BAB-UF) reactors, where the incorporation of PVA significantly enhances structural integrity, biodegradation resistance, and functional lifespan, providing an efficient, sustainable solution for removing odorous compounds from rural water. Experimental results showed the enhanced chitosan/PVA porous biochar aerogels (CPPCA) displayed excellent biocapacity and structural stability. After 63 days of continuous operation, the degradation rate of biochar aerogels with 0.2 wt% PVA (CP2PCA) was only 8.2 %. The one-step membrane reactors utilizing PVA-enhanced aerogels achieved removal efficiencies for DMDS/DMTS pollutants of up to 98.4 %, surpassing systems without PVA. These findings indicate the potential for improved aerogels in rural drinking water treatment, providing a viable solution for effective and low-maintenance water purification.

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耐用壳聚糖/聚乙烯醇生物炭气凝胶生物降解辅助去除农村饮用水中的硫基恶臭化合物

由于原水质量差和处理方案有限，农村饮用水经常受到二甲硫醚（DMDS）和二甲基三硫醚（DMTS）等令人不快的气味的影响。本研究介绍了壳聚糖/聚乙烯醇（PVA）生物炭气凝胶支撑的超滤（baba - uf）反应器中耐用的生物膜，PVA的掺入显著提高了结构完整性、抗生物降解性和功能寿命，为去除农村水中的恶臭化合物提供了一种高效、可持续的解决方案。实验结果表明，壳聚糖/聚乙烯醇增强多孔生物炭气凝胶（CPPCA）具有良好的生物容量和结构稳定性。连续运行63天后，0.2 wt% PVA （CP2PCA）的生物炭气凝胶的降解率仅为8.2%。利用PVA增强气凝胶的一步式膜反应器对DMDS/DMTS污染物的去除率高达98.4%，超过了不使用PVA的系统。这些发现表明改进气凝胶在农村饮用水处理中的潜力，为有效和低维护的水净化提供了可行的解决方案。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.