AI Article Synopsis
- The study focused on treating high-strength wastewater from a kraft pulp mill using an air stripping-UASB process, effectively reducing volatile organic sulfur compounds by 70%-80%.
- The UASB reactor demonstrated impressive performance, achieving around 95% Chemical Oxygen Demand (COD) removal at an organic loading rate of 30 kg/m³/d.
- Notably, the inoculated granules in the reactor broke down in the new environment, leading to the growth of different anaerobic microorganisms, as observed through scanning electron microscopy.
Article Abstract
Evaporator condensate from a kraft pulp mill is characterized by high temperature, high strength, poor nutrition, and some odor and inhibitive materials. In this study, air stripping-UASB process was developed to treat the wastewater from a kraft pulp mill. The lab scale study demonstrated that air stripping process removed 70%-80% of the volatile organic sulfur compounds. After that, the UASB reactor showed high efficiency, at the organic loading rate (COD) of 30 kg x (m3 x d)(-1), COD removal was retained about 95%. On the other hand, the inoculated granules were broken in the new surroundings and were replaced with the newly formed granules The scanning electronic microscope (SEM) observation showed wide difference of the predominant anaerobic microorganisms in the seed and newly formed granules.
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