Fig. 1: Morphology and nitrogen removal performance of engineered photogranules.
From: Interspecies hydrogen transfer between cyanobacteria and symbiotic bacteria drives nitrogen loss
a Morphology of photogranules according to microscopic observation, scanning electron microscopic observation, and CLSM images, the red signal represents the self-fluoresce of chlorophyll-a. Micrographs are representative results from 5 images. b Short-read based metagenomic microbial composition of photogranules at the phylum level. c Nitrogen removal performance of the photobioreactor during the 400-day operation. NLR: Nitrogen loading rate; NRR: Nitrogen removal rate; The reactor initially was fed with acetate as the electron donor for denitrification, maintaining a low organic carbon-to-nitrogen (C: N) ratio of 1:1 during Days 0–220. The acetate was eliminated from the influent during Days 221–400 to make an autotrophic nitrogen removal system. d Nitrogen and dissolved oxygen (DO) profile of the photobioreactor in a typical cycle on Day 400. Source data are provided with this paper.
