生菜水培系统对养鳖废水的净化与利用  

Purification and utilization of turtle-breeding wastewater in Lactuca sativa var.romana hydroponics system.

作　　者：劳善根[1] 

机构地区：[1]浙江大学环境工程系

出　　处：《农村生态环境》2004年第3期66-69,共4页Rural Eco-Environment

基　　金：国家自然科学基金资助项目(59775046)

摘　　要：将工厂化养鳖废水加1次硝酸,调节NO-3 N与NH+4 N含量的比例及初始pH后用作生菜(Lactucasativavar.romana)水培试验。结果表明,该处理系统在22～28℃运行2周,废水的SS与CODCr分别降至20与100mg·L-1以下,pH为6～9,达到GB8978—1996《污水综合排放标准》(一级标准),NH+4 N与TP含量分别降至22.1～30.3mg·L-1与0.64～0.69mg·L-1,接近或达到GB8978—1996《污水综合排放标准》(二级标准),且培养液中生菜长势良好,生物量增长率达19.9%～25.1%。Wastewater from an industrialized turtle-breeding farm,treated with a single application of nitric acid to adjust the ratio of NO^-3-N and NH^+4-N and initial pH,was tested as medium for hydroponics of cos lettuce(Lactuca sativa var.romana).Results show that after two weeks of operation under 22—28 ℃,SS and COD(Cr) in the wastewater with pH ranging between 6—9 was reduced to less than 20 mg·L^(-1) and 100 mg·L^(-1),respectively,meeting Grade 1 criteria of the 'Integrated Standard for Wastewater Discharge'(GB 8978—1996);and NH^+4-N and TP was lowered down to 22.1—30.3 (mg·)L^(-1) and 0.64—0.69 mg·L^(-1),respectively,approaching or meeting Grade 2 criteria of the standard(GB 8978—1996).Moreover, the cos lettuce grew quite well in the wastewater with a growth rate of 19.9%—25.1% in biomass.

关 键 词：废水 净化 养鳖废水 水培 生菜 

分 类 号：S966.5[农业科学—水产养殖] X703[农业科学—水产科学]