title: Studies on affecting factors and mechanism of treating decentralized domestic sewage by a novel anti-clogging soil infiltration system.
abstract: The effects of bore diameter and particle size of polyurethane (PU) foam on soil wastewater infiltration system as well as its anti-clogging mechanism were investigated in this study. Different types of PU were used to determine the effect of bore diameter and particle size on the chemical oxygen demand (COD) removal. The results revealed that bore diameter showed little effects and the optimal size of PU should be not less than 10 mm. The formation of strong hydrophilic group on the outer layer of hydrophobic PU foam was fixed with active ingredient Al2O3, leading to good anti-clogging effect. Denaturing gradient gel electrophoresis fingerprint profiles and cluster analysis showed that the microbial community in the bottom was different from that in other places of the normal column, while it in the top has obvious differences from that in other places of the clogging column. Furthermore, the dominant microbial species of the normal column was Betaproteobacteria while Alphaproteobacteria in the clogging column.
authors.affiliation: a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai , People's Republic of China.
authors.forename: Haiping
authors.initials: H
authors.lastname: Yuan
authors.affiliation: a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai , People's Republic of China.|b Shanghai Municipal Engineering Design Institute (Group) Co., Ltd , Shanghai , People's Republic of China.
authors.forename: Junying
authors.initials: J
authors.lastname: Nie
authors.affiliation: a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai , People's Republic of China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gu
authors.affiliation: a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai , People's Republic of China.
authors.forename: Nanwen
authors.initials: N
authors.lastname: Zhu
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D000641:Ammonia; D001419:Bacteria / Q000235:genetics / Q000302:isolation & purification; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000032:analysis; D058645:Denaturing Gradient Gel Electrophoresis; D009584:Nitrogen; D010316:Particle Size; D010758:Phosphorus; D011140:Polyurethanes / Q000737:chemistry*; D016062:Porosity; D012722:Sewage; D012987:Soil; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D011140:Polyurethanes; D012722:Sewage; D012987:Soil; D010758:Phosphorus; D000641:Ammonia; C028279:polyurethane foam; D000537:Aluminum Oxide; D009584:Nitrogen
keywords: PCR-DGGE; Soil wastewater infiltration system (SWIS); anti-clogging; decentralized domestic sewage; mechanism