渔业科学进展2018，Vol.39Issue(3)：80-88,9.DOI:10.19663/j.issn2095-9869.20170309001
不同耐盐植物人工湿地净化养殖外排水效果
Purification Efficiency of Mariculture Wastewater in Constructed Wetlands with Two Salt-Tolerant Plants
摘要
Abstract
As an eco-friendly wastewater treatment method, constructed wetlands have been widely used in purifying aquaculture wastewater. However, due to the effects of salt stress of seawater, the feasibility of treating mariculture wastewater in constructed wetland with different plants needs further study. To investigate the water contaminant removal efficiency, two integrated vertical flow constructed wetlands (IVCW) were constructed. Phragmites australis and Spartina alterniflora were selected as the constructed wetland plants. The salinity tolerance of P. australis was significantly different from that of S. alterniflora. The content of ammonia nitrogen (NH4-N), nitrite nitrogen (NO2-N), nitrate nitrogen (NO3-N), phosphorus, total phosphorus (TP), and potassium permanganate index (CODMn) were determined for 14 d. The two constructed wetland were filled with fine sand, vermiculite, and corallite. The results showed that the optimum salinity of P. australis was 20 and that of S. alterniflora was less than 35. The physical and chemical properties of the purified water were: temperature (28.60±0.71)℃, pH 7.60±0.04, and dissolved oxygen (DO) (5.32±0.45) mg/L. This demonstrated that the efficiency of P. australis wetland and S. alterniflora wetland in the removal of NH4-N and CODMn was (85.48±0.50)％and (57.74±4.40)％; and (95.01±1.18)％ and (72.84±2.64)％, respectively. The efficiency in the removal of phosphate and TP were 40.00％～50.00％ by both the constructed wetlands. These results suggested that the salt tolerance of S. alterniflora was better than P. australis. There were significant differences in NH4-N and CODMn between P. australis wetland and S. alterniflora wetland (P<0.05). However, the difference between the wetlands was not significant for phosphate and TP (P>0.05). In the short term, the efficiency of the removal of NH4-N and CODMn from mariculture effluents by S. alterniflora wetland was better than by the P. australis wetland. Under high-salinity stress, S. alterniflora had strong salt tolerance and grew better in seawater, and had better purification efficiency than P. australis. However, the efficiency in the removal of phosphate and TP exhibited no significant difference between the two wetlands.关键词
人工湿地/耐盐植物/氮磷去除率Key words
Constructed wetland/Salt-tolerant plant/Removal efficiencies of nitrogen and phosphorus分类
农业科技引用本文复制引用
许永辉,崔正国,曲克明,王艳艳,王加鹏,李悦悦,胡清静..不同耐盐植物人工湿地净化养殖外排水效果[J].渔业科学进展,2018,39(3):80-88,9.基金项目
中国水产科学研究院基本科研业务费(2016HY-ZD04)、山东省重点研发计划(2016ZDJS06A07)、国家自然科学基金(31101906)和青岛市博士后研究人员应用研究项目(Q51201610)共同资助[This work was supported by Central Public-Interest Scientific Institution Basal Research Fund, CAFS (2016HY-ZD04), the Major Research and Development Project of Shandong Province (2016ZDJS06A07), National Natural Science Foundation of China (31101906), and Postdoctoral applied research project of Qingdao (Q51201610)]. （2016HY-ZD04）
