Biodegrading Polycyclic Aromatic Hydrocarbons by Composting of Municipal Sewage Sludge and Rapeseed Meal
The goal of these studies was to determine the fate of 16 polycyclic aromatic hydrocarbons (PAHs) during 94 days of composting of municipal sewage sludge with rapeseed meal. The total PAHs calculated from the sum of the amounts of the 16 PAHs in the initial mixture of municipal sewage sludge was about 1.792 mg·kg-1. Then the content of total 16 PAHs was 0.153 mg·kg-1 at the final of composting. The treatment by composting led to a decrease of all PAHs mainly in the stabilization phase, but some differences could be observed between PAHs with three or fewer aromatic rings (N ≤ 3) and those with four or more (N ≥ 4). The PAHs with N of three or fewer (except phenanthrene) exhibited a continuous decrease, which the PAHs with with N of four or more and phenanthrene showed increases between the 31-46 days. This indicates the high potential sorption mainly of PAHs with high molecular weight (N ≥ 4) plus phenanthrene, their tight adsorption makes them inaccessible for biodegradation. The high molecular weight PAHs showed a greater reduction of their bioavailability than low molecular weight. This is in agreement with the fact that the adsorption is less reversible with increased numbers of fused aromatic rings or an increase of their hydrophobicity.
PAHs sewage sludge rapeseed meal composting biodegradation
PAN Fei CHEN Wu LIUYang ZHANG Yaqing YING Caoming ZENG Qingfu
School of Environmental Science & Engineering,Donghua University,Shanghai 201620,China Engineering R Engineering Researchfor Clean Production of Textile Dyeing and Printing,Ministry of Education,Wuhan Engineering Research for Clean Production of Textile Dyeing and Printing,Ministry of Education,Wuhan
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
2251-2256
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）