title: Preparation of ceramic filler from reusing sewage sludge and application in biological aerated filter for soy protein secondary wastewater treatment.
abstract: Dehydrated sewage sludge (DSS) and clay used as raw materials for preparation of novel media-sludge ceramic filler (SCF) and SCF employed in a lab-scale up-flow biological aerated filter (BAF) were investigated for soy protein secondary wastewater treatment. Single factor experiments were designed to investigate the preparation of SCF, and the characteristics (microstructure properties, toxic metal leaching property and other physical properties) of SCF prepared under the optimum conditions were examined. The influences of media height, hydraulic retention time (HRT) and air-liquid ratio (A/L) on chemical oxygen demand (CODcr) and ammonia nitrogen (NH4(+)-N) removal rate were studied. The results showed that the optimum addition of DSS was approximately 25.0 wt% according to the physical properties of SCF (expansion ratio of 53.0%, v/v, water absorption of 8.24 wt%, bulk density of 350.4 kg m(-3) and grain density of 931.5 kg m(-3)), and the optimum conditions of BAF system were media height of 75.0 cm, HRT of 10.0 h and A/L of 15:1 in terms of CODcr and NH4(+)-N removal rate (91.02% and 90.48%, respectively). Additionally, CODcr and NH4(+)-N (81.6 and 15.3 mg L(-1), respectively) in the final effluent of BAF system met the national standard (CODcr ≤ 100 mg L(-1), NH4(+)-N ≤ 25.0 mg L(-1), GB 18918-2002, secondary standard).
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Suqing
authors.initials: S
authors.lastname: Wu
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Yuanfeng
authors.initials: Y
authors.lastname: Qi
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China. Electronic address: qyyue@sdu.edu.cn.
authors.forename: Qinyan
authors.initials: Q
authors.lastname: Yue
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Baoyu
authors.initials: B
authors.lastname: Gao
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, PR China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Gao
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China.
authors.forename: Chunzhen
authors.initials: C
authors.lastname: Fan
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiaotong University, Shanghai 200240, PR China.
authors.forename: Shengbing
authors.initials: S
authors.lastname: He
mesh_terms: D000538:Aluminum Silicates; D002516:Ceramics / Q000737:chemistry*; D000077215:Clay; D005374:Filtration / Q000379:methods*; D019649:Food Industry; D012722:Sewage / Q000737:chemistry*; D030262:Soybean Proteins; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D000077215:Clay; D012722:Sewage; D030262:Soybean Proteins; D062065:Wastewater
keywords: Biological aerated filter; Ceramic filler; Secondary treatment; Sewage sludge; Soy protein processing wastewater