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Chemistry and Industry of Forest Products ›› 2024, Vol. 44 ›› Issue (1): 33-40.doi: 10.3969/j.issn.0253-2417.2024.01.005

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Analysis of Aerobic Biological Inhibition Characteristics and Degradation Law of Eucalyptus Chemical Mechanical Pulp Wastewater

Laibao DING(), Qingwen TIAN, Ran YANG, Jinwei ZHU, Qi GUO, Guigan FANG()   

  1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China
  • Received:2023-10-20 Online:2024-02-28 Published:2024-02-23
  • Contact: Guigan FANG E-mail:dingyua2019@163.com;ppfangguigan@163.com


In this paper, the composition and content of organic matter in the effluent of anaerobic treatment and aerobic treatment of eucalyptus chemical mechanical pulp wastewater were analyzed by GC-MS method. The analysis of number of carbon atoms in the wastewater before and after aerobic treatment was counted, and the main bio-refractory components and degradation rules in the wastewater were analyzed. The results showed that the main residual organic pollutants after anaerobic and aerobic treatment were linalool (C10, 21.21%), methyl p-tert-butyl phenylacetate (C13, 21.39%), dihydromyrcenol (C10, 8.90%), lilial (C14, 6.16%) and citronellol (C10, 4.76%), etc, mainly containing benzene ring organic matter and bacteriostatic components, with biological refractory degradation and bacteriostatic properties. The macroscopic performance was that the removal rate of biological treatment was low. Before and after aerobic treatment, the mass fraction of alcohols in wastewater increased from 19.32% to 51.71%, the mass fraction of aldehydes increased from 3.68% to 13.35%, the mass fraction of esters decreased from 29.75% to 28.32%, and the mass fraction of benzene-containing organics increased from 32.70% to 61.06%, indicating that other organics were degraded more greatly than benzene-containing organics. It was recommended to improve the biological treatment effect by detoxification pretreatment and bioaugmentation to improve microbial activity, reduce the difficulty of subsequent deep treatment, reduce the cost of comprehensive treatment, and achieve low-cost discharge.

Key words: eucalyptus chemi-mechanical pulp wastewater, biological treatment, biological inhibition, degradation law, detoxification

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