竹炭-微生物联合法对沼液中氨氮的去除
Ammonia nitrogen removal from biogas slurry by bamboo charcoal microbe
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摘要: 采用竹炭 微生物联合法，考察了竹炭用量、菌液用量、进水氨氮浓度、pH、DO、HRT等因素对氨氮废水处理效果的影响；同时采用对比实验，初步探讨了竹炭 微生物联合法处理沼液的作用机理。结果表明，竹炭 微生物法去除沼液氨氮的最优条件推荐为：竹炭用量30 g/L，微生物活性液用量3%，pH 7.0~8.0，DO为2 mg/L，HRT为48 h。竹炭 微生物法对沼液氨氮的去除过程可用一级反应动力学模型C=272.56e-0.0148描述，其去除效果来源于竹炭吸附和生物降解的协同作用，协同程度为48.45%。Abstract: An experiment was carried out to establish the optimal operating conditions for a combined treatment of bamboo charcoal and microbes (BCM) to remove ammonia nitrogen from biogas slurry. The treatment showed a high removal efficiency when the bamboo charcoal was applied at the rate of 30 g/L， inoculated bacterium solution was at the concentration of 3%， pH value between 7.0~8.0， DO at the value of 2 mg/L， and HRT of 48 h. The removal dynamics could be described as a first order equation (i.e. C=272.56e-0.0148). The synergistic reaction between bamboo charcoal adsorption and microbial degradation (48.45%) could be one major reason that BCM showed a great removal efficiency when compared with the separated treatment by bamboo-charcoal or microbes.
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Key words:
- bamboo charcoal /
- microorganism /
- biogas slurry /
- ammonia nitrogen
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