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DNA sequencing of pulp and paper wastewater treatment systems to inform process analysis

机译：纸浆和造纸废水处理系统的DNA测序可为工艺分析提供依据

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Australian Paper is located 150 km east of Melbourne and produces a range of packaging and printing papers. This site is an integrated pulp and paper mill with a wastewater treatment system on site. The wastewater treatment system prepares water for final discharge under EPA licence.An analytical program was launched in December 2016 which utilises DNA sequencing, online parameters and extensive chemical testing. The long-term goal is to create a database of 'wholistic snapshots' over time for correlation and multivariate studies. The focus of this ongoing study is the physical, chemical and microbiological processes used to treat and purify the wastewaters. Analysis to date represents the first six complete sampling rounds. Despite the preliminary nature of this data, some trends are readily apparent.DNA sequencing results revealed the influent to primary treatment areas are heavily dominated by the Genera Cloacibacterium and Hydrogenophaga, suggesting that these are major populations in the paper making processes. In the aerated system, the diversity markedly increases with major populations of Microbacterium, Magnetospirrilum and Asticcacaulis.The hypothesis that algal growth is an important contributor to TSS in the river discharge is supported by DNA sequence data showing that 18.8% of sequences detected in the discharge were Cyanobacterial. Correlation analysis shows that the TSS concentration at the river discharge is affected by the temperature for the 28 d period prior to discharge.Biomass removal from the secondary clarifier has an inverse relationship with BOD in the river discharge. In light of this finding, maintenance on equipment involved in biomass removal should be a high priority to ensure maximum biomass removal.These preliminary results give insight into the complex nature of the Australian Paper treatment system and will inform operational action to minimise environmental impact. The results also show that tracking bacterial populations using Next Generation sequencing is a viable undertaking and is a valuable addition to the conventional monitoring methods.
机译：澳大利亚纸业公司位于墨尔本以东150公里处，生产各种包装纸和印刷纸。该站点是纸浆和造纸厂的综合工厂，并设有废水处理系统。废水处理系统根据EPA许可为最终排放的水做好准备.2016年12月启动了一项分析程序，该程序利用DNA测序，在线参数和广泛的化学测试。长期目标是创建一段时间内的“整体快照”数据库，以进行相关性和多变量研究。这项正在进行的研究的重点是用于处理和净化废水的物理，化学和微生物过程。迄今为止的分析代表了前六个完整的抽样回合。尽管该数据具有初步性质，但仍存在一些趋势。DNA测序结果显示，主要细菌感染区的主要细菌是梭菌属和加氢菌属，这表明它们是造纸过程中的主要种群。在曝气系统中，多样性随微生物，磁螺线虫和小叶藻的主要种群而显着增加。DNA序列数据支持藻类生长是河流排放中TSS的重要因素这一假设得到证实，DNA序列数据表明在排放物中检测到18.8％的序列。蓝细菌。相关分析表明，河水排放前TSS浓度受排放前28 d的温度的影响。次要澄清池中生物量的去除与河水中BOD呈反比关系。鉴于这一发现，应优先考虑维护涉及生物质去除的设备，以确保最大程度地去除生物质。这些初步结果可深入了解澳大利亚造纸处理系统的复杂性质，并将为最大程度地减少对环境的影响提供操作依据。结果还表明，使用下一代测序跟踪细菌种群是一项可行的工作，并且是对常规监测方法的宝贵补充。

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