化工学报 ›› 2015, Vol. 66 ›› Issue (6): 2248-2255.DOI: 10.11949/j.issn.0438-1157.20150111

• 能源和环境工程 • 上一篇    下一篇

木质框架土壤渗滤系统处理养猪废水厌氧消化液的效能

赵博玮, 李建政, 邓凯文, 孟佳   

  1. 哈尔滨工业大学城市水资源与水环境国家重点实验室, 黑龙江 哈尔滨 150090
  • 收稿日期:2015-01-22 修回日期:2015-03-07 出版日期:2015-06-05 发布日期:2015-03-16
  • 通讯作者: 李建政
  • 基金资助:

    黑龙江省应用技术研究与开发计划项目(GC13C303);国家水体污染控制与论理科技重大专项(2013ZX07201007)。

Efficiency of wood-chip-framework soil infiltration system in treating anaerobically digested swine wastewater

ZHAO Bowei, LI Jianzheng, DENG Kaiwen, MENG Jia   

  1. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
  • Received:2015-01-22 Revised:2015-03-07 Online:2015-06-05 Published:2015-03-16
  • Supported by:

    supported by the Science and Technology Department of Heilongjiang Province(GC13C303) and the Major Science and Technology Program for Water Pollution Coutrol and Management (2013ZX07201007).

摘要:

为处理高氨氮、低C/N比的养猪废水厌氧消化液, 构建了具有缓释碳源特性的木质框架土壤渗滤系统(WFSI), 并通过运行测试了进水浓度和表面水力负荷(SHL)对系统处理效能的影响。在SHL为0.2 m3·m-2·d-1条件下, 当进水COD和NH4+-N平均浓度分别从152和175.5 mg·L-1提高到421和788.7 mg·L-1时, 系统对COD的去除率从52.3%提高到61.2%, NH4+-N去除率从84.2%下降到61.5%, TN去除率从28.6%提高到了33.5%, NH4+-N和TN去除负荷分别达到了75.5和41.7 g·m-3·d-1。当SHL提高为0.32 m3·m-2·d-1时, 系统仍能维持运行, 但处理效能受到显著影响。在进水COD 和NH4+-N分别为265和465 mg·L-1左右时, COD、NH4+-N及TN的去除率分别平均为56.5%、53.3%和20.9%。木质填料及其附着层形成的NH4+-N浓度梯度, 可使系统承受较高的SHL的同时获得缓释碳源, 并保护氨氧化细菌免受自由氨毒性。

关键词: 养猪废水, 厌氧消化液, 废物处理, 填充床, 渗透, 脱氮

Abstract:

A wood-chip-framework soil infiltrator (WFSI) with slow-release of carbon source was constructed and used to treat an anaerobically digested swine wastewater characterized with high NH4+-N and low C/N ratio. Pollutant removal efficiency of the WFSI was investigated under various influent concentration and varying surface hydraulic load (SHL). Under SHL of 0.2 m3·m-2·d-1, influent averaged COD and NH4+-N increased from 152 and 175.5 mg·L-1 to 421 and 788.7 mg·L-1, respectively. The resultant COD, NH4+-N and TN removal by the system was 52.3% to 61.2%, 84.2% to 61.5% and 28.6% to 33.5%, respectively. Meanwhile, NH4+-N and TN removal loading reached 75.5 and 41.7 g·m-3·d-1, respectively. Though SHL was as high as 0.32 m3·m-2·d-1, the system still performed but its efficiency was remarkably influenced. When influent COD and NH4+-N was around 265 and 465 mg·L-1, COD, NH4+-N and TN removal was about 56.5%, 53.3% and 20.9%, respectively. The wood carrier observably worked as a slow-release carbon source, and protected the ammonia oxidizing bacteria from free ammonia toxicity due to the concentration gradient of NH4+-N in the adhesive layers.

Key words: swine wastewater, anaerobically digested liquor, waste treatment, packed bed, permeation, nitrogen removal

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