Saritpongteeraka Kanyarat, Chaiprapat Sumate
Faculty of Environmental Management, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand.
Bioresour Technol. 2008 Dec;99(18):8987-94. doi: 10.1016/j.biortech.2008.05.012. Epub 2008 Jul 9.
The objective of this study was to compare the performance of anaerobic baffled reactor (ABR) treating concentrated rubber latex wastewater under different pH adjustment substances and recycling ratios (R). Two ABRs, one received wastewater pretreated with NaOH and the other with ash, were operated at 35 degrees C under identical HRTs from 10 to 1.25d. Results show that both ABRs had highest COD and sulfate removal efficiencies at HRT 10d (averaged 82.71% and 96.16% of ABR-NaOH, and 80.77% and 96.60% of ABR-Ash, respectively), where majority of the influent COD and sulfate were removed by the first compartment of the ABR at all conditions tested. Increasing R (0, 0.3 and 0.5) raised the hydraulic loading on the system and resulted in a drop of organic removal efficiency and methane yield. Translocation of sulfate reducing bacteria and methanogens in the ABRs caused by increased organic loading and effluent recycle is discussed. The results show great potential of parawood ash as a pH adjustment substance for acidic wastewaters.
本研究的目的是比较厌氧折流板反应器（ABR）在不同pH调节物质和循环比（R）条件下处理浓缩橡胶乳胶废水的性能。两个ABR，一个接收用NaOH预处理的废水，另一个接收用灰分预处理的废水，在35℃下以相同的水力停留时间（HRT）从10天运行到1.25天。结果表明，两个ABR在HRT为10天时均具有最高的COD和硫酸盐去除效率（ABR-NaOH平均分别为82.71%和96.16%，ABR-灰分平均分别为80.77%和96.60%），在所有测试条件下，大部分进水COD和硫酸盐在ABR的第一隔室中被去除。增加R（0、0.3和0.5）会提高系统的水力负荷，并导致有机物去除效率和甲烷产量下降。讨论了由有机负荷增加和出水循环导致的ABR中硫酸盐还原菌和产甲烷菌的迁移。结果表明，木灰作为酸性废水的pH调节物质具有很大的潜力。
