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Impact of Water Treatment Plant Alum Sludge Residuals on Wastewater Treatment Plant Biological Processes: A Case Study

机译：水处理厂明矾残渣对废水处理厂生物过程的影响：一个案例研究

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摘要

Water treatment plant (WTP) residual discharge is considered a pollutant and requires treatment to prevent negative impacts when released to the environment. As regulatory requirement becomes increasingly strict, WTPs are required to find suitable methods for the treatment of sludge residuals. Wastewater treatment plants(WWTP) provide existing treatment methods to remove contaminants from WTP residuals. A case study on the Carbondale Water Treatment Plant (CWTP) and receiving Carbondale Southeast Waste Water Treatment Plant (SEWWTP) provided an opportunity to quantify potential negative impacts for the discharge of residual alum sludge to a biologic sludge digestion plant.;The first part of the study focused on quantifying changes to the SEWWTP loading conditions from the addition of metal salt coagulant water treatment residuals discharged by the CWTP. Historic sludge quantities and treatment methodologies for both the CWTP and SEWWTP were used to predict loading conditions and residual concentrations at the SEWWTP. Ammonia, BOD, pH, and TSS concentrations from the CWTP were not identified to significantly impact the existing concentrations at the SEWWTP. Metals concentrations from the CWTP were also found to fall within WWTP regulatory quantities.;The second part of the study evaluated potential impacts to beneficial bacteria populations in the SEWWTP oxidation ditch from the receipt of CWTP alum residuals. Studies of residual alum sludge impacts to beneficial bacterial populations are rare, and often do not translate from one treatment plants processes to the next. The SEWWTP employs a multi-ring oxidation ditch with an anoxic outer ring and aerobic middle and inner rings. Biologic Activity Reaction Tests (BART) were used to isolate beneficial bacteria species typically present in oxidation ditches including heterotrophic aerobic bacteria, denitrifying bacteria, and nitrifying bacteria. Heterotrophic aerobic bacteria and denitrifying bacteria are the predominant beneficial bacteria species in the outer ring, while nitrifying bacteria and heterotrophic aerobic bacteria dominate the aerobic inner rings. Heterotrophic aerobic bacteria and denitrifying bacteria populations identified in the outer ring of the oxidation ditch did not demonstrate any population impacts from the receipt of residual alum sludge. In addition, nitrifying bacteria populations and heterotrophic aerobic bacteria population demonstrated no impacts from the introduction of CWTP residual alum waste to the aerobic inner ring of the oxidation ditch. Overall, the study demonstrated the treatment of residual alum sludge from a WTP is possible through the existing biological processes at a WWTP.
机译：水处理厂（WTP）的残留排放被认为是一种污染物，需要进行处理以防止排放到环境中时产生负面影响。随着法规要求变得越来越严格，要求污水处理厂寻找合适的方法处理污泥残渣。废水处理厂（WWTP）提供了现有的处理方法，以去除WTP残留物中的污染物。对卡本代尔水处理厂（CWTP）和接收卡本代尔东南废水处理厂（SEWWTP）的案例研究提供了一个机会，可以量化将残留明矾污泥排放到生物污泥消化厂的潜在负面影响。该研究的重点是通过添加由CWTP排放的金属盐凝结剂水处理残留物来量化SEWWTP装载条件的变化。 CWTP和SEWWTP的历史污泥数量和处理方法均用于预测SEWWTP的装载条件和残留浓度。未确定CWTP中的氨，BOD，pH和TSS浓度会显着影响SEWWTP的现有浓度。 CWTP中的金属浓度也被发现在WWTP监管量之内。研究的第二部分评估了收到CWTP明矾残留物对SEWWTP氧化沟中有益细菌种群的潜在影响。剩余的铝污泥对有益细菌种群影响的研究很少，而且通常不会从一种处理厂的过程转移到另一种处理厂的过程。 SEWWTP采用了多环氧化沟，带有一个缺氧的外环和有氧的中，内环。生物活性反应测试（BART）用于分离通常存在于氧化沟中的有益细菌，包括异养性好氧细菌，反硝化细菌和硝化细菌。异养性好氧细菌和反硝化细菌是外环中主要的有益细菌，而硝化细菌和异养性好氧细菌则占好氧内环。在氧化沟外圈中发现的异养需氧细菌和反硝化细菌种群没有显示出由于接收剩余明矾污泥而对种群造成的影响。此外，硝化细菌种群和异养需氧细菌种群对将CWTP残留明矾废料引入氧化沟的需氧内环没有影响。总体而言，研究表明，通过污水处理厂现有的生物工艺，可以处理污水处理厂的残留氧化铝污泥。

著录项

  • 作者

    Litteken, Garrett Michael.;

  • 作者单位

    Southern Illinois University at Carbondale.;

  • 授予单位 Southern Illinois University at Carbondale.;
  • 学科 Civil engineering.;Engineering.
  • 学位 M.S.
  • 年度 2017
  • 页码 109 p.
  • 总页数 109
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:54:21

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