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Article Abstract
The weak resistance of anaerobic ammonia oxidizing bacteria (AnAOB) to harsh environment is the key problem facing the application of AnAOB process. In order to elucidate the mechanism of the effect of light on anammox systems, the nitrogen removal performance and microbial succession at different wavelengths were investigated. The results showed that the nitrogen removal performance of the UV light reactor significantly decreased, while that of the green light reactor increased. The average total nitrogen removal rate (TNRR) of green light reactor was 10.71 × 10 mg TN/(mg MLSS·h) and increased by 22.04 % compared to that of dark conditions. Additionally, microalgae growth was observed in the warm-white light, purple light and red light reactors. The combined effects of ROS and microalgae affect the TNRR of anammox system. When the synergies of microalgae, AnAOB and other microorganisms are greater than the competition, the system shows better nitrogen removal performance. When competition is greater than synergy, the nitrogen removal performance of the system may be reduced.
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| http://dx.doi.org/10.1016/j.jenvman.2025.126773 | DOI Listing |
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