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Jiangxi Nonferrous Metals Society
ISSN：1674-9669
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CODEN YJKYA9
Volume 4 Issue 1
Feb.  2013
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CHAI Li-yuan, LUO Xian-ping, DING Li-chao, CHEN Yun-nen. The treatment of medium-low concentrated ammonium-nitrogen wastewater by sewage sludge modified by ferric chloride[J]. Nonferrous Metals Science and Engineering, 2013, 4(1): 53-56. DOI: 10.13264/j.cnki.ysjskx.2013.01.019
Citation: CHAI Li-yuan, LUO Xian-ping, DING Li-chao, CHEN Yun-nen. The treatment of medium-low concentrated ammonium-nitrogen wastewater by sewage sludge modified by ferric chloride[J]. Nonferrous Metals Science and Engineering, 2013, 4(1): 53-56. DOI: 10.13264/j.cnki.ysjskx.2013.01.019
shu

The treatment of medium-low concentrated ammonium-nitrogen wastewater by sewage sludge modified by ferric chloride

  • 1.

    School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

  • 2.

    School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China

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  • Received Date: November 05, 2012
  • Published Date: February 27, 2013
    Graphical Abstract
    • Abstract
  • Uncontrolled discharge of untreated or incompletely treated nitrogenous pollutants has caused a great deal of harm to the environment. The traditional technologies are inefficient for treating medium -low ammonium -nitrogen. Using residual activated sludge from sewage plant modified 2 h by ferric chloride as adsorbent, wastewater containing medium -low ammonium -nitrogen was treated. The experimental results indicate that the removal rate of ammonium-nitrogen can attain above 95 % with 0.15 mol/L ferric chloride, 5 g/L dosage (pH=9) after 40 min reaction at room temperature. The adsorption process accords with pseudo second-order kinetics equation. Under the experimental conditions, initial ammonium-nitrogen concentration and COD being 102.68 mg/L and 362 mg/L, was reduced to 9.2 mg/L and 83 mg/L for NH4+ and COD respectively, after adsorption treatment in actual industrial wastewater. The discharged waste water has achieved < Integrated wastewater discharge standard>(NH4+ < 15 mg/L and COD < 100 mg/L).
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    • References (16)
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