水产学报2012，Vol.36Issue(4)：568-575,8.DOI:10.3724/SP.J.1231.2012.27762
人工湿地联合塘内设施调控生产性虾塘水环境的效果与技术
The effect and application of treatment for wastewater of productive shrimp aquaculture by constructed wetlands combined with pond facilities
摘要
Abstract
Wastewater treatment technologies with constructed wetlands and pond facilities for freshwater Litopenaeus vannamei culture were conducted and the effects were measured. The wetlands consist of free water surface (FWS) and subsurface horizontal flow (SF) wetlands. Ponds facilities contain aerators and artificial water purifying nets. During the middle and late culture period (about 60 d later), shrimp ponds' wastewater was recirculated three times through the wetlands under hydraulic loading rate (HLR) of 1.65 m/d which effectively improved water quality in shrimp ponds and ensured a good harvest. At the same time, the outbreak of blue-green algae was controlled. NO-2 -N and BOD5 at outlet were significantly removed at different levels (P<0.0l and P<0.05). The removal percentage and removal rates were 72.6%, 0.467 g/m2·d and 29.7%, 2.651 g/(m2·d). The removal percentage and removal rates of PO3-4-P, TN and CODMn were 41.7%, 0.022g/(m2·d), 26.1% , 2.619 g/(m2·d) and 15.9%, 3.738 g/(m2·d) respectively. The removal percentage of NO-3 -N was only 3.6% but the removal rate was as high as 0.462 g/(m2·d). NO-2 -N and NO-3 -N were both significantly (P<0.01) reduced by 96.8% and 93.3% when effluents remained in the macrophytes unit for 4 d. The water chemical parameters were all maintained within a safe range during the culture period. The harvested shrimp in experimental pond had the mean body weight of 8.81 g and length of 9.36 cm. While the culture in control group had to terminate on the 60th day due to an outbreak of shrimp disease caused by microcystin and the harvested shrimp was only 3.06 g and 6.54 cm each. The results indicated that low frequency operation of the constructed wetlands under a higher HLR combined with pond facilities could effectively control water quality in shrimp pond under the conditions of no water exchange and no medicine use and then ensured a good harvest.关键词
凡纳滨对虾/生产性养殖/人工湿地/塘内设施/循环水处理/养殖废水Key words
Litopenaeus vannamei/ productive culture/ wetland/ facilities in pond/ recirculating water treatment/ aquaculture wastewater分类
农业科技引用本文复制引用
臧维玲,张煜,戴习林,刘永士,杨明,侯文杰,丁福江..人工湿地联合塘内设施调控生产性虾塘水环境的效果与技术[J].水产学报,2012,36(4):568-575,8.基金项目
上海市科委创新行动计划(073919102) （073919102）
