Effect of corn pre-puffing on the efficiency of MgO-engineered biochar for phosphorus recovery from livestock wastewater: mechanistic investigations and cost benefit analyses

Abstract To improve the phosphorus (P) recovery efficiency from livestock wastewater, a novel MgO doped mildewed corn biochar with thermal pre-puffing treatment (Mg-PBC) and without (Mg-BC) was synthesized tested. The thermal-puffing pretreatment improved effectiveness of metal soaking dispersion. P time Mg-PBC (7 h) significantly shorter than that Mg-BC (12 h). Moreover, showed higher capacity (241 mg g −1 ) (96.6 ). fitted to Thomas model 90.7 , which 4 times (22.9 under column test conditions. mechanisms involved in included precipitation, surface complexation, electrostatic interaction. After adsorption, both relatively low regeneration abilities. loaded (Mg-BC-P) (Mg-PBC-P), later particularly, obviously increased available content promoted plant growth. release Mg-PBC-P treated soil, while it decreased fertilizer soil. A cost–benefit analysis revealed greatly profit −0.66 5.90 US$ kg . These findings highlight biomass is feasible produce modified recover can be used as slow-release fertilizer. Graphical