Industrial-scale composting of swine manure with a novel additive-yellow phosphorus slag: Variation in maturity indicators, compost quality and phosphorus speciation

•Composting of PM adding with YPS was conducted in an industrial-scale SPM-reactor.•Theomorphic period lasted for 15 days with the highest temperature of 65℃.•GI of compost product was higher than 70%, and Σ(N + P2O5 + K2O) content was 11.16%.•The content of Olsen P was decreased, while CAP content was increased.•Labile P fractions were converted into slowly released HCl extracted-inorganic P.