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首页> 外文会议>8th IAWQ International Conference on Design, Operation and Economics of Large Wastewater Treatment Plants, held in Budapest, Hungary, 6-9 September, 1999 >Aerobic treatment of industrial waste water-experiences with the dosage of nitrogen and phosphorus
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Aerobic treatment of industrial waste water-experiences with the dosage of nitrogen and phosphorus

机译：氮磷配比对好氧工业废水的处理

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摘要

In industrial wastewater, especially from food industry, the concentrations of the organic compounds are usually high, whereas the contents of nitrogen and phosphorus are often low. For the aerobic treatment, the addition of nutrients to the industrial wastewater can be required. For ecological and economic reasons, this nutrient addition must be kept to a minimum. Unintentional nitrification and denitrification lead to an additional demand of nitrogen and should therefore be avoided at such plants. Observations from two treatment plants (50 000 m~3/d, 40 t COD/d) proved that the nitrogen dosage can be controlled by monitoring the ammonia concentration. If the control procedure aso considers the N/COD ratio in the raw wastewater (including the N dosage) and the organic sludge load of the last couple of days, very low effluent concentrations (NH_4-N in the range of 0.3-0.5 mg/l) can be achieved and the nitrogen dosage is low. If there are periods with nitrogen in excess, too, a minimum nitrification capacity has to be maintained by means of nitrogen addition in periods of deficiency. A control procedure for phosphorus addition is to keep a fixed P/COD-ratio in the raw wastewater (including P dosage). The PO_4-P concentration is monitored in order to limit the maximum phosphorus dosage. Following this procedure, considerable savings of phosphorus have been achieved, keeping very low effluent concentrations (average Total-P<0.3 mg/l).
机译：在工业废水中，尤其是食品工业废水中，有机化合物的浓度通常较高，而氮和磷的含量通常较低。对于好氧处理，可能需要向工业废水中添加营养。出于生态和经济原因，必须将这种营养物添加量降至最低。意外的硝化和反硝化会导致对氮的额外需求，因此在此类工厂中应避免使用。来自两个处理厂（50 000 m〜3 / d，40 t COD / d）的观察结果证明，可以通过监测氨气浓度来控制氮的用量。如果控制程序还考虑了原始废水中的N / COD比（包括N剂量）和最近几天的有机污泥负荷，则废水浓度非常低（NH_4-N范围为0.3-0.5 mg / l）可以达到且氮用量低。如果也有氮过量的时期，则在缺乏时期必须通过添加氮来维持最小的硝化能力。添加磷的控制程序是在原废水中保持固定的P / COD比（包括P剂量）。监测PO_4-P浓度以限制最大磷剂量。按照该程序，磷的节省量可观，同时保持了非常低的废水浓度（平均Total-P <0.3 mg / l）。

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