Journal Title
Title of Journal: Ecotoxicology
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Abbravation: Ecotoxicology
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Authors: Shuo Liu Qiusha Ma Baozhen Wang Jifu Wang Ying Zhang
Publish Date: 2014/02/28
Volume: 23, Issue: 4, Pages: 689-698
Abstract
A largescale combined pondswetland system was applied for advanced treatment of refractory pollutants in petrochemical industrial wastewater The system was designed to enhance bioactivity and biological diversity which consisted of anaerobic ponds APs facultative ponds FPs aerobic pond and wetland The refractory pollutants in the petrochemical wastewater to be treated were identified as alkanes chloroalkanes aromatic hydrocarbons and olefins which were significantly degraded and transformed along with the influent flowing through the enhanced bioactive ponds–wetland system 8 years of recent operational data revealed that the average removal rate of stable chemical oxygen demand COD was 427 and that influent COD varied from 923 to 1956 mg/L Final effluent COD could reach 658 mg/L average COD removal rates were high in the APs and FPs and accounted for 75 of the total amount removed This result indicated that the APs and FPs degraded refractory pollutants through the facilitation of bacteria growth The changes in the community structures of major microbes were assessed by 16SrDNA—denaturing gradient gel electrophoresis The same analysis was used to identify the main bacterial function for the removal of refractory pollutants in the APs and FPs The APs and FPs displayed similar microbial diversities and some of the identified bacteria degraded and removed refractory pollutants The overall results proved the applicability stability and high efficiency of the pondswetland system with enhanced bioactivity in the advanced removal of refractory pollutants from petrochemical industrial wastewaterThe study received financial support from the PhD Programs Foundation of the Ministry of Education of China No 20122329120002 the Special Fund Projects for Harbin Science and Technology Innovation Talents No 2013RFQXJ132 the National Natural Science Foundation of China No 41071332 the Reserve Talents of Universities Overseas Research Program of Heilongjiang No 2012381 and the Program for the Science and Technology Innovation Team in Universities and Colleges of Heilongjiang Province
Keywords:
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