New process for simultaneous removal of nitrogen and sulphur under anaerobic conditions
New process for simultaneous removal of nitrogen and sulphur under anaerobic conditions
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DOI：
10.1016/s0043-1354(00)00474-7
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发表时间：
2001-03-01
期刊：
影响因子：
12.8
通讯作者：
Villaverde, S
中科院分区：
文献类型：
--
作者：
Fdz-Polanco, F;Fdz-Polanco, M;Villaverde, S
一个处理甜菜糖蜜乙醇蒸馏厂酒糟的颗粒活性炭（GAC）厌氧流化床反应器运行了90天，启动的前40天，之后在1.7克化学需氧量/升·天的恒定有机负荷率下运行了50天。该反应器在有机物去除方面表现良好，但在沼气中分子氮浓度异常高这方面表现异常。对不同含氮和含硫化合物的分析以及这些化合物在液相和气相中的质量平衡清楚地表明，反应器中氮和硫的演变不寻常。以凯氏氮（TKN）总量形式进入反应器的氮约有50%从液相中去除，以N₂形式出现在气相中。同时，最初存在于进水中的硫酸根（S - SO₄²⁻）只有20%以硫化物（S - S²⁻）形式出现在出水中或以硫化氢（S - H₂S）形式出现在沼气中，这表明80%的硫被去除。这种现象此前在文献中未曾报道过。这些观察结果可能表明存在一种新的氨和硫酸盐厌氧去除工艺，其依据的是一种涉及同时进行厌氧氨氧化和硫酸盐还原的不寻常机制。（C）2001爱思唯尔科学有限公司。版权所有。
A granular activated carbon (GAC) anaerobic fluidised-bed reactor treating vinasse from an ethanol distillery of sugar beet molasses was operated for 90 days, the first 40 days of start-up followed by 50 days of operation at constant organic loading rate of 1.7g COD/Ld. The reactor showed good performance in terms of organic matter removal but an anomalous behaviour in terms of unusual high concentrations of molecular nitrogen in the biogas. The analysis of the different nitrogenous and sulphur compounds and the mass balances of these compounds in the liquid and gas phases clearly indicated an uncommon evolution of nitrogen and sulphur in the reactor. About 50% of the nitrogen entering the reactor as total Kjeldahl nitrogen (TKN) was removed from the liquid phase appearing as N-2 in the gas phase. Simultaneously, only 20% of the S-SO42- initially present in the influent appears as S-S2- in the effluent or S-I-IS in the biogas, indicating that 80% of the sulphur is removed. This behaviour has not been reported previously in the literature. These observations may suggest a new anaerobic removal process of ammonia and sulphate according to an uncommon mechanism involving simultaneous anaerobic ammonium oxidation and sulphate reduction. (C) 2001 Elsevier Science Ltd. Ail rights reserved.