ALA, 5-Aminolevulinic acid; APB, Anoxygenic phototrophic bacteria; Anoxygenic phototrophic bacteria (APB); BChl, Bacteriochlorophyll; BES, Bioelectrochemical systems; BPV, Biophotovoltaic; BPh, Bacteriopheophytin; Bacteriochlorophyll (BChl); Chl, Chlorophyll; CoQ10, Coenzyme Q10; DET, Direct electron transfer; DNA, Deoxyribonucleic acid; DO, Dissolved oxygen; DXP, 1 deoxy-d-xylulose 5-phosphate; FPP, Farnesyl pyrophosphate; Fe-S, Iron-Sulfur; GNSB, Green non sulfur bacteria; GSB, Green sulfur bacteria; IPP, Isopentenyl pyrophosphate isomerase; LED, light emitting diode; LH2, light-harvesting component II; MFC, Microbial fuel cell; MVA, Mevalonate; PH3B, Poly-3-hydroxybutyrate; PHA, Poly-ß-hydroxyalkanoates; PHB, Poly-ß-hydroxybutyrate; PNSB, Purple non sulfur bacteria; PPB, Purple phototrophic bacteria; PSB, Purple sulfur bacteria; Pheo-Q, Pheophytin-Quinone; Photo-BES, Photosynthetic bioelectrochemical systems; Photo-MFC, Photo microbial fuel cell; Poly-ß-hydroxyalkanoates (PHA); Purple phototrophic bacteria (PPB); Resource recovery; RuBisCO, Ribulose-1,5-biphosphate carboxylase/oxygenase; SCP, Single-cell protein; SOB, Sulfide oxidizing bacteria; SRB, Sulfate reducing bacteria; Single-cell proteins (SCP)