Hilles Ahmed H, Abu Amr Salem S, Hussein Rim A, Arafa Anwar I, El-Sebaie Olfat D
Department of Environmental Health, High Institute of Public Health, Alexandria University, Egypt; Environment Quality Authority, Palestine.
School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
Waste Manag. 2015 Oct;44:172-7. doi: 10.1016/j.wasman.2015.07.046. Epub 2015 Aug 3.
The current study investigated the effects of S2O8(2-) and S2O8(2-)/H2O2 oxidation processes on the biodegradable characteristics of an anaerobic stabilized leachate. Total COD removal efficiency was found to be 46% after S2O8(2-) oxidation (using 4.2 g S2O8(2-)/1g COD0, at pH 7, for 60 min reaction time and at 350 rpm shaking speed), and improved to 81% following S2O8(2-)/H2O2 oxidation process (using 5.88 g S2O8(2-) dosage, 8.63 g H2O2 dosage, at pH 11 and for 120 min reaction time at 350 rpm). Biodegradability in terms of BOD5/COD ratio of the leachate enhanced from 0.09 to 0.1 and to 0.17 following S2O8(2-) and S2O8(2-)/H2O2 oxidation processes, respectively. The fractions of COD were determined before and after each oxidation processes (S2O8(2-) and S2O8(2-)/H2O2). The fraction of biodegradable COD(bi) increased from 36% in raw leachate to 57% and 68% after applying S2O8(2-) and S2O8(2-)/H2O2 oxidation, respectively. As for soluble COD(s), its removal efficiency was 39% and 78% following S2O8(2-) and S2O8(2-)/H2O2 oxidation, respectively. The maximum removal for particulate COD was 94% and was obtained after 120 min of S2O8(2-)/H2O2 oxidation. As a conclusion, S2O8(2-)/H2O2 oxidation could be an efficient method for improving the biodegradability of anaerobic stabilized leachate.
本研究考察了S2O8(2-)及S2O8(2-)/H2O2氧化过程对厌氧稳定化渗滤液生物降解特性的影响。经S2O8(2-)氧化后（在pH值为7、反应时间60分钟、振荡速度350转/分钟的条件下，使用4.2克S2O8(2-)/1克COD0），总化学需氧量（COD）去除率为46%；而在S2O8(2-)/H2O2氧化过程后（使用5.88克S2O8(2-)用量、8.63克H2O2用量、pH值为11、反应时间120分钟、振荡速度350转/分钟），该去除率提高至81%。渗滤液的生化需氧量与化学需氧量之比（BOD5/COD）所体现的生物降解性，在S2O8(2-)和S2O8(2-)/H2O2氧化过程后分别从0.09提高至0.1和0.17。在每次氧化过程（S2O8(2-)和S2O8(2-)/H2O2）前后测定了COD的各组分。可生物降解COD（bi）的占比从原渗滤液中的36%分别增至S2O8(2-)和S2O8(2-)/H2O2氧化后的57%和68%。至于可溶性COD（s），其去除率在S2O8(2-)和S2O8(2-)/H2O2氧化后分别为39%和78%。颗粒态COD的最大去除率为94%，在S2O8(2-)/H2O2氧化120分钟后获得。总之，S2O8(2-)/H2O2氧化可能是提高厌氧稳定化渗滤液生物降解性的有效方法。
