不同厌氧发酵系统在造纸废水处理中的应用

在“碳达峰和碳中和”目标下寻求高效处理造纸废水的方法尤为迫切。以某造纸厂的废水为研究对象，利用不同的厌氧发酵系统对其进行微生物降解，分别对厌氧发酵过程中的生物甲烷组分、液体组分、液体DOM、微生物群落结构进行了测定和分析，优化了处理系统。结果表明：不同厌氧发酵系统对废水中各组分降解去除能力依次为MEC-AD>MFC-AD>AD+磁铁矿>AD；MEC-AD处理造纸废水具有高效性，可促使生物甲烷高峰期相对AD提前8 d，SCOD、TP和NH₄⁺-N去除率分别达到了77.79%、86.73%和75.98%，废水DOM中酪氨酸类蛋白质、色氨酸类蛋白质和溶解性微生物的含量显著降低，生物甲烷高峰期菌群的优势菌属为Proteobacteria、Bacteroidetes。

Application of different anaerobic digestion systems in paper mill wastewater treatment

It is particularly urgent to seek high-efficiency treatment of papermaking wastewater under the goal of 'Carbon peaking and carbon neutrality'. In this study, the wastewater from a paper mill was selected as the research object, and different anaerobic digestion systems were used to microbially degrade it. The biomethane composition, liquid composition, liquid DOM and microbial community structure in the anaerobic digestion process were determined to optimize the treatment system. The results showed that the order of degradation and removal ability of the components in wastewater by different systems was MEC-AD > MFC-AD > AD + magnetite > AD. Compared to AD, MEC-AD presented high-efficiency in papermaking wastewater treatment, which could promote 8 days in advance for the occurrence of biomethane peak period. The removal rates of SCOD, TP and NH4+-N reached 77.79 %, 86.73 % and 75.98 %, respectively. The tyrosine protein, tryptophan protein and soluble microorganisms in the wastewater DOM were significantly reduced. The dominant bacteria in biomethane production peak in MEC-AD were Proteobacteria and Bacteroidetes.