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沈阳得利满AO工艺升级为改良A2 O工艺的可行性研究

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以国电东北环保产业集团有限公司北部污水处理厂20万t∕d沈阳得利满AO( SDAO)工艺为研究对象，通过将原SDAO工艺初沉池及污泥恢复区改造为厌氧区和预缺氧区的方式升级为改良A2 O工艺，并考察了升级工艺的处理效果。结果表明：在进水温度为(12．2±0．5)℃，CODCr∕TN为4．0~6．0，CODCr、TN和TP浓度分别为200、35．9和3．05 mg∕L条件下，以醋酸钠(折合CODCr为50 mg∕L)为外加碳源添加至进水，改良A2 O工艺出水的TN、NH4+-N、TP浓度及CODCr分别为11．8、1．34、0．17和31．7 mg∕L；改良A2 O工艺对CODCr和NH4+-N的去除率与原工艺相似，且均达到较好的去除效果；TN的去除率由35．5%提高至67．8%；原工艺不具备除磷功能，改良A2 O工艺对TP的去除率达94．3%。 SDAO工艺在未增设构筑物的条件下完成了工艺的升级，升级后的改良A2 O工艺实现了氮磷污染物的高效去除。
Feasibility Study on Modified A2 O Process to Upgrade and Reconstruct Shenyang Degremont Anoxic Oxic Process
Based on the 200 000 t∕d Shenyang Degremont Anoxic Oxic process ( SDAO ) of Guodian Shenyang North Wastewater Treatment Plant, the primary settling tank and the sludge recovery zone in SDAO process were transformed to anaerobic zone and pre-anoxic zone in modified A2 O process. The pollutants removal performances of the modified A2 O process were investigated. The results showed that the modified A2 O process effluent of TN, NH4+-N, TP and CODCr was 11. 8, 1. 34, 0. 17 and 31. 7 mg∕L, when influent temperature, CODCr∕TN ratio, CODCr, TN and TP were around (12. 2 ± 0. 5)℃, 4. 0-6. 0, 200 mg∕L, 35. 9 mg∕L and 3. 05 mg∕L with adding sodium acetate ( CODCr of 50 mg∕L) . Modified A2 O process removal performance of CODCr and NH4+-N was similar to SDAO process. However, TN removal ratio in the modified A2 O process could increase from 35. 5% to 67. 8%compared with the SDAO process. Moreover, TP removal ratio in the modified A2 O process could increase to 94. 3% by contrast with incompetent TP removal performance of SDAO process. In the condition without reconstruction of pre-anoxic zone and anaerobic zone, the upgrade was able to enhance nitrogen and phosphorus removal performance obviously.

Shenyang Degremont anoxic oxic ( SDAO) processmodified A2 O processbiological nutrients and phosphorus removalupgrade and reconstruct

赵蓉、郑涛、孙晨、王思宇、郭鹏翔、田智勇、向连城、李海波

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国电东北环保产业集团有限公司北部污水处理厂，辽宁 沈阳 110035

环境基准与风险评估国家重点实验室，中国环境科学研究院，北京 100012

中国环境科学研究院城市水环境科技创新基地，北京 100012

中国建筑技术集团有限公司，北京 100013

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沈阳得利满AO(SDAO)工艺 改良A2 O工艺 脱氮除磷 升级改造

国家水体污染控制与治理科技重大专项国家水体污染控制与治理科技重大专项

2012ZX07202-0052013ZX07202-010

2016

10.3969/j.issn.1674-991X.2016.06.079

环境工程技术学报
中国环境科学研究院

环境工程技术学报

CSTPCD
影响因子：1
ISSN：1674-991X
年,卷(期)：2016.6(6)
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