科研之友
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摘要
Efficiencies of SBR and granular activated carbon (GAC)-SBR systems with textile industrial wastewater (TIW) containing basic dyes (Basic Red 46 (BR46) and Basic Blue 41 (BB41)) at hydraulic retention times (HRTs) of 3.0, 5.0, and 7.5d were investigated. The results showed that the basic dyes could be adsorbed onto bio-sludge but the adsorption yield depended on the molecular structure and weight of the basic dye. BR46 could be adsorbed onto the bio-sludge with higher yield than BB41. Also, the color adsorption yield of living bio-sludge was 22% higher than that of autoclaved bio-sludge (thermally treated bio-sludge). Moreover, the bio-sludge from a domestic wastewater treatment plant showed higher color adsorption yield than the bio-sludge from a textile wastewater treatment plant. The GAC-SBR system was more suitable than the SBR system to treat TIW. The highest color, COD, BOD5, total Kjeldahl nitrogen (TKN), and total nitrogen (TN) removal efficiencies of the GAC-SBR system with TIW at HRT of 5d (organic loading of 0.22kgBOD(5)/m(3)d and dye loading of 0.02kg/m(3)d) were 68.3 +/- 3.2, 88 +/- 1, 90 +/- 1, 80.6 +/- 6.8, and 55.9 +/- 3.2%, respectively. Moreover, its removal efficiency could be increased by adding organic matter (glucose). The color, COD, BOD5, TKN, and TN removal efficiencies with TIW containing 0.87g/L glucose at HRT of 5.0d (organic loading of 0.25kgBOD(5)/m(3)d) increased up to 80.0 +/- 0.7, 97 +/- 1%, 98 +/- 0, 83.3 +/- 0.0, and 58.9 +/- 0.2%, respectively. Moreover, it was the first study where nitrogen removal bacteria (nitrifying and denitrifying bacteria) were the main bacteria in basic dyes removing mechanism.
- 出版日期2016-12
