采用中试规模的裂解-隐蔽生长系统结合超声/堿性破碎和水解/产酸预处理实现剩余污泥的减量化。
Excess sludge reduction using pilot-scale lysis-cryptic growth system integrated ultrasonic/alkaline disintegration and hydrolysis/acidogenesis pretreatment.
机构信息
School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
出版信息
Bioresour Technol. 2012 Jul;116:441-7. doi: 10.1016/j.biortech.2012.03.091. Epub 2012 Apr 4.
A pilot-scale lysis-cryptic growth system was built and operated continuously for excess sludge reduction. Combined ultrasonic/alkaline disintegration and hydrolysis/acidogenesis were integrated into its sludge pretreatment system. Continuous operation showed that the observed biomass yield and the sludge reduction efficiency of the lysis-cryptic growth system were 0.27 kg VSS/kg COD consumed and 56.5%, respectively. The water quality of its effluent was satisfactory. The sludge pretreatment system performed well and its TCOD removal efficiency was 7.9% which contributed a sludge reduction efficiency of 2.1%. The SCOD, VFA, TN, NH(4)(+)-N, TP and pH in the supernatant of pretreated sludge were 1790 mg/L, 1530 mg COD/L, 261.1mg/L, 114.0mg/L, 93.1mg/L and 8.69, respectively. The total operation cost of the lysis-cryptic growth system was $ 0.186/m(3) wastewater, which was 11.4% less than that of conventional activated sludge (CAS) system without excess sludge pretreatment.
建立并连续运行了一个中试规模的溶胞-隐晦生长系统以实现剩余污泥的减量。超声/堿性破碎和水解/产酸被整合到污泥预处理系统中。连续运行表明，溶胞-隐晦生长系统的观测到的生物量产率和污泥减量效率分别为 0.27kgVSS/kgCOD 消耗和 56.5%。其出水水质令人满意。污泥预处理系统运行良好，其 TCOD 去除效率为 7.9%，对污泥减量效率的贡献为 2.1%。预处理污泥上清液中的 SCOD、VFA、TN、NH(4)(+)-N、TP 和 pH 值分别为 1790mg/L、1530mgCOD/L、261.1mg/L、114.0mg/L、93.1mg/L 和 8.69。溶胞-隐晦生长系统的总运行成本为 0.186 美元/m(3)废水，比未经剩余污泥预处理的传统活性污泥（CAS）系统低 11.4%。
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