LAUSR

In this paper, bamboo charcoal as raw material, low-density bamboo charcoal was prepared by modification with the potassium hydroxide activation. The results of scanning electron microscopy (SEM), specific surface area, and aperture analysis (Brunauer–Emmett–Teller-Barrett–Joyner– Halenda), and Fourier transform infrared (FT-IR) showed the total pore volume of bamboo charcoal increased, the wet density decreased after modification. Low-moisture density bamboo charcoal was used as a suspended biological carrier in a moving bed biofilm reactor (MBBR) to treat simulated domestic sewage. The removal effects of chemical oxygen demand (COD), ammonia nitrogen, total nitrogen (TN), and total phosphorous (TP) were systematically studied. Results showed the low-moisture density bamboo charcoal suspension bio-carrier takes good fluidization state and outstanding removal effect. For simulated domestic sewage with an influent COD mass concentration of 200 mg/L, the optimized MBBR process conditions are as the gas–water ratio of 100:1 (volume ratio), the filling rate for bamboo charcoal of 15%, and 4 h of hydraulic retention. After MBBR treatment, the effluent COD, ammonia nitrogen, and removal rates of TN and TP were 83%, 77%, 48%, and 57%, respectively.