Pasukphun N, Vinitnantharat S, Gheewala S
Division of Environmental Technology, School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand.
Pak J Biol Sci. 2010 Apr 1;13(7):316-24. doi: 10.3923/pjbs.2010.316.324.
The aim of this study is to investigate the decolorization in anaerobic/aerobic biological activated carbon (A/A BAC) system. The experiment was divided into 2 stages; stage I is batch test for preliminary study of dye removal equilibrium time. The preliminary experiment (stage I) provided the optimal data for experimental design of A/A BAC system in SBR (stage II). Stage II is A/A BAC system imitated Sequencing Batch Reactor (SBR) which consist of 5 main periods; fill, react, settle, draw and idle. React period include anaerobic phase followed by aerobic phase. The BAC main media; Granular Activated Carbon (GAC), Mixed Cultures (MC) and Biological Activated Carbon (BAC) were used for dye and organic substances removal in three different solutions; Desizing Agent Solution (DAS), dye Solution (DS) and Synthetic Textile Wastewater (STW). Results indicate that GAC adsorption plays role in dye removal followed by BAC and MC activities, respectively. In the presence desizing agent, decolorization by MC was improved because desizing agent acts as co-substrates for microorganisms. It was found that 50% of dye removal efficiency was achieved in Fill period by MC. GC/MS analysis was used to identify dye intermediate from decolorization. Dye intermediate containing amine group was found in the solution and on BAC surfaces. The results demonstrated that combination of MC and BAC in the system promotes decolorization and dye intermediate removal. In order to improve dye removal efficiency in an A/A BAC system, replacement of virgin GAC, sufficient co-substrates supply and the appropriate anaerobic: aerobic period should be considered.
本研究的目的是调查厌氧/好氧生物活性炭（A/A BAC）系统中的脱色情况。实验分为两个阶段；第一阶段是进行批次试验，以初步研究染料去除平衡时间。初步实验（第一阶段）为序批式反应器（SBR）中A/A BAC系统的实验设计（第二阶段）提供了最佳数据。第二阶段是模仿序批式反应器（SBR）的A/A BAC系统，该系统由五个主要阶段组成；进水、反应、沉淀、排水和闲置。反应阶段包括厌氧阶段，随后是好氧阶段。BAC主要介质；颗粒活性炭（GAC）、混合培养物（MC）和生物活性炭（BAC）用于在三种不同溶液中去除染料和有机物质；退浆剂溶液（DAS）、染料溶液（DS）和合成纺织废水（STW）。结果表明，GAC吸附在染料去除中起作用，其次分别是BAC和MC的活性。在存在退浆剂的情况下，MC的脱色效果得到改善，因为退浆剂作为微生物的共底物。发现MC在进水阶段实现了50%的染料去除效率。采用GC/MS分析来鉴定脱色过程中的染料中间体。在溶液中和BAC表面发现了含有胺基的染料中间体。结果表明，系统中MC和BAC的组合促进了脱色和染料中间体的去除。为了提高A/A BAC系统中的染料去除效率，应考虑更换新鲜GAC、充足的共底物供应和适当的厌氧：好氧时间。
