8 1 Vol. 8 No. 1 0 1 4 1 Chinese Journal of Environmental Engineering Dec. 0 1 4 UASB 1 1 1* 1. 100085. 980-8579 UASB HRT COD COD 10 000 mg /L ph 6. 8 7. 1 UASB 6 g COD / L d UASB COD 73. 5% COD 600 mg /L ph 7. 4 8. 0 VFA 500 mg /L UASB UASB X703 A 1673-9108 014 1-5156-05 Investigation on anaerobic biodegradability of pharmaceutical wastewater and anaerobic treatment using UASB reactor Li Weicheng 1 Tian Zhe 1 Qi Weikang Niu Qigui Liu Yuyu Li YuYou Gao Yingxin 1 1. State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China. Department of Civil and Environmental Engineering Graduate School of Engineering Tohoku University Sendai Miyagi 980-8579 Japan Abstract In this study anaerobic biodegradability of high strength pharmaceutical wastewater from six main departments in a pharmaceutical manufacturer was firstly evaluated by a series of batch experiments. Based on the experimental data two stage-uasbs were applied to treat the wastewater containing effluent from all manufacturing departments. The influence of organic loading rate OLR from initial 1. 0 g COD / L d to maximum 1. 0 g COD / L d on the performance of reactor was investigated through step-decreasing HRT. Influent COD was diluted to 10 000 mg /L with the adjustment of ph to 6. 8 ~ 7. 1. Total COD removal efficiency of 73. 5% with the effluent COD of 600 mg /L was noticed at OLR of 6. 0 g COD / L d maximum OLR for practical engineering application. Satisfactory organic compound removal efficiency during the long term run indicted the feasibility of two-stage UASBs for treatment of this kind of pharmaceutical wastewater effluent. Key words pharmaceutical wastewater anaerobic biodegradability UASB reactor 13 1 3 % 1 4 5 6 7 8 9 10-1 863 01AA063401 014-04 - 1 014-05 - 5 1973 E-mail hnkf014@ yahoo. com * E-mail gyx@ rcees. ac. cn
1 UASB 5157 UASB 1 1. 1 1 Fig. 1 Schematic diagram of batch experiment on methane production UASB 3 mol /L NaOH 1 1 51. 5 g VSS /L Table 1 Quality of main departments effluent and volume of discharge per day 1 / 35 ~ 38 m 3 /d ph COD mg /L 303 1- -3-53. 8 0 000 304 73. 8 1. 6 100 305 17 1. 3 35 000 306 1 3 5-177 6. 80 000 308 7 1. 4 6 00 310 3-95 7. 6 5 000 1. 1.. 1 1 UASB Fig. Schematic diagram of the two stage UASB COD 3 000 ~ 3 400 mg /L50 ml 51. 5 g VSS /L 30 ml 1. 3 g COD 1. 5 g NaH- COD ph METTLER CO 3 ph 6. 9 ~ 7. 0 TOLEDO FE 0 ph VFA 35 3% NaOH H S CO. 1 1.. UASB 3 1 d 3 UASB UASB 1 3 5-306 140 mm 6 L 190 ml
5158 8 COD /COD 6. 3% UASB 6 g COD / L d 304 180 ml 1- -3-303 135 ml Fig. 3 3 Methane production in the batches with time 1 UASB 1 g COD / L d 1 UASB 4 50 d 0 ~ 30 d 1 g COD / L d g COD / L d HRT 10 d 5 d COD 64. 5% 30 ~ 100 d HRT 1 g COD / L d HRT 0. 83 4 a 4 b COD 6 g COD / L d 60 ~ 70 d COD 48. 3% 1 g COD / L d 80 ~ 100 d COD 38. % COD HRT 305 16 3-310 90 ml 1 L / L d 101 ml 30% 6 g COD / L d 6 L / L d 35% 308 8 g COD / L d 64 ml 4 d 308 310 1 g COD / L d 7. 5 g COD / 3- L d 9. 9 g COD / L d4 d 305 4 e VFA 450 mg /L VFA 305 ph 8. 3 7. 3 4 3 c COD 6 g 168 ml 60. 4% COD / L d ph. 1 UASB 1 17 COD 60 000 SO - 4 + 4H H mg /L 10 000 mg /L COD /S = 11 S + H O + OH - UASB COD /S > 10 VFA 500 mg /L 18 3 14 15 100 ~ 10 d COD 500 ~ 3 000 mg /L 6 g COD / L d 4 UASB 0 d ph 6. 9 ~ 7. 1 1 g COD 1. 5 g NaHCO 3. 3 UASB UASB 1 1 UASB COD 40 UASB 1 ph 6. 9 ~ 7. 1 UASB COD UASB 1 HRT OLR 5 a 5 d HRT UASB COD 38. 8% ~
1 UASB 5159 Fig. 4 4 UASB 1 Performance of UASB 1 with the stepwise increase of OLR Fig. 5 5 UASB Performance of UASB with the stepwise increase of OLR 47. 6% 500 mg /L ph 0. 5 L / L d 5 1 UASB e UASB VFA 5 c 1
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