7种常用渔药对海水闭合循环系统生物滤器硝化作用的影响

Effects of seven chemotherapeutic agents on nitrification of closed seawater culture system

在海水闭合循环系统中加入常用剂量的呋喃唑酮 (C8H7N3 O5)、甲苯咪唑 (C16H13 N3 O3 )、土霉素 (C2 2 H2 4N2 O5.2H2 O)、氯霉素 (C11H12 O5N2 Cl2 )、CuSO4+FeSO4合剂、强氯精 (C3 Cl3 N3 O3 ,有效氯 6 2 .5 % )、甲醛 (CH2 O)等 7种常用渔药 ,确定系统把 10mg/L总氨氮 (NH4+ N)硝化至较低水平 (CNH4 N<0 .0 5mg/L ,CNO2 N<0 .0 1mg/L)所需的时间及氧化过程中各主要水质指标的变化 ,并以此作为判断生物滤器的硝化能力是否受到影响的依据。结果表明 ,分别加入甲苯咪唑至 1、2、3mg/L(全水体质量浓度 ,其他同此 )、CuSO4+FeSO4合剂 (0 .5 +0 .2 )mg/L、土霉素 1mg/L、氯霉素 1、2、3mg/L均对生物滤器硝化作用无明显影响 ;土霉素 2、3mg/L、强氯精 1mg/L或甲醛 10、2 0、30、4 0mg/L影响生物滤器对亚硝酸氮的氧化 ;分别以呋喃唑酮 1、2、3mg/L、重复添加氯霉素至 3mg/L、重复或直接添加强氯精至 2mg/L都影响氨氮。

The effects of seven commonly used chemotherapeutic agents, forazolidonum(C 8H 7N 3O 5),mebendazolum(MBZ, C 16 H 13 N 3O 3),oxytetracyclinum(C 22 H 24 N 2O 5·2H 2O),chloramphenicolum(C 11 H 12 O 5N 2Cl 2),mixture of CuSO 4 and FeSO 4,acidum trichloroisocyanuras(TCCA, C 3Cl 3N 3O 3) and formaldehyde (CH 2O),on nitrification in closed seawater culture systems were evaluated by monitoring concentrations and oxidation time of total ammonia nitrogen(NH 4 + N) and NO 2 N before and during the treatment. The experiments results show that MBZ at concentrations of 1,2 or 3 mg/L( the whole water concentration,the same below) , oxytetracyclinum at concentration of 1 mg/L,chloramphenicolum at concentrations of 1,2 or 3 mg/L,the mixture of CuSO 4 and FeSO 4 at (0.5+0.2) mg/L does not produce significant effects on nitrification of the system; while,oxytetracyclinum at 2 and 3 mg/L,TCCA (effective Cl - 62.5%) at 2 mg/L,formaldehyde at 10,20,30 or 40 mg/L, respectively, can inhibit the oxidation of NO 2 N; furazolidonum at 1,2 or 3 mg/L,chloramphenicolum at 3 mg/L added repeatedly or TCCA at 2 mg/L can produce significant effects on nitrification.