天津市原位生物化学法治理修复黑臭底泥的试验研究

研究采用室内模拟的方法, 探讨了黑臭底泥生物2化学法原位修复中自制生物2化学复合药剂( 以/ 反硝化细 菌2硝酸钙0 为主要原料) 投加量对底泥理化性质变化及上覆水水质变化的影响。综合考虑, 最终确定适合底泥致黑 臭污染物去除且节约成本的最佳处理剂投加量为2 000 mg / L( 以硝酸钙2N 计) 。以此投加量将底泥处理剂埋入试 验用底泥 30 d 后, 上覆水( 400 m l) T P 由 01 50 mg/ L 降至 01 36 mg/ L; CODCr、氨氮、硝态氮、亚硝态氮分别由 31 mg / L、01 10 mg / L、01 65 mg / L、01 07 mg/ L 增加至 325 mg / L、301 27 mg/ L、41 91 mg/ L、131 55 mg/ L, 底泥 AVS 由 11 31 Lmo l/ g 降至 01 35 Lmo l/ g; 底泥外观疏松膨胀、由黑变黄。判断此投加量下底泥处理剂对黑臭底泥治理情况 好, 可以此为依据进一步进行天津市某河道黑臭底泥原位修复中试研究, 以确定最优投加量。 In this study, we used t he labor ator y simulation method to investig ate the changes of the phy sical and chemical pro per2 ties o f bot tom sediment and the overly ing wat er qualit y as a function of the dosage of self2made bio2chemical compounding ag ent ( w ith "denitrifying bacteria2calcium nitrate" as the main raw material) in the in2 situ biochemical remediation o f black2odor sedi2 ment. Based on comprehensive consider atio n, we determined t hat t he o ptimal and cost2saving do sag e of treatment ag ent for the remov al o f black2o do r pollutants should be 2 000 mg / L ( calculated as calcium nitr ate2N) . After bury ing the sediment tr eatment agent in the test sediment fo r 30 day s, w e fo und the T P of the ov erlying w ater ( 400 ml) w as r educed fr om 01 50 mg/ L to 01 36 mg/ L; CODCr , ammonia nitr og en, nitr ate nitr og en, and nitrite nitr og en respect ively increased from 31 mg/ L, 01 10 mg/ L, 01 65 mg/ L, and 01 07 mg / L to 325 mg / L, 301 27 mg / L, 41 91 mg/ L, and 131 55 mg/ L; the sediment AVS w as r educed from 11 31 Lmo l/ g t o 01 35 Lmol/ g ; the sediment looked loo se and ex panded, and tur ned from black to yellow . We judged that this dosag e wo rked w ell on the treatment of black2odor sediment. It can be used as the basis fo r furt her pilo t st udy o n the in2situ remedia2 tion of black2odor sediment in a river co urse in Binhai New Area o f Tianjin, in or der to determine the optimal dosag e. 2017 年天津市生态环境治理科技示范工程项目( 17ZXST SF00100)