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| Practice of Odor Control in Pulp and Paper Wastewater Treatment Station |
| Received:September 02, 2024 |
| DOI：10.11980/j.issn.0254-508X.2024.12.015 |
| Key Words:biotrickling filter biofilter kraft pulping regenerated papermaking waste gas treatment |
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| Abstract:This study focused on the treatment of odorous waste gas emitted from wastewater during kraft pulping and regenerated papermaking. A combination process of “biotrickling filter+biofilter+alkaline scrubbing” was designed to treat the waste gas. After treatment， the emission rates of hydrogen sulfide， ammonia， methyl mercaptan， volatile organic compounds （VOCs）， and odor concentrations in the waste gas discharge outlet of the pulp line were reduced to 0.037 kg/h， 0.013 kg/h， 0.0230 kg/h， 2.374 kg/h， and 550， respectively. The emission rates of the same pollutants and odor concentrations in the waste gas discharge outlet of papermaking could be reduced to at least 0.020 kg/h， 0.021 kg/h， 0.000 6 kg/h， 0.013 kg/h， and 977， respectively， which met requirements of the “Emission Standards for Odor Pollutants” （GB 14554—1993） and the “Integrated Emission Standards of Air Pollutants” （GB 16297—1996）. The operating cost for per unit gas volume of this combined process was as low as 0.001 3 yuan/m3， with high treatment efficiency， providing an engineering demonstration for the design and implementation of waste gas treatment project in pulp and paper wastewater treatment station. |
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