Micronutrient supplements to enhance biological wastewater treatment of phosphorus-limited industrial effluent

被引:13
作者
Burgess, JE
Quarmby, J [1 ]
Stephenson, T
机构
[1] Cranfield Univ, Sch Ind & Mfg Sci, Cranfield MK43 0AL, Beds, England
[2] Cranfield Univ, Sch Water Sci, Cranfield MK43 0AL, Beds, England
基金
英国工程与自然科学研究理事会;
关键词
activated sludge; industrial wastewater; vitamins; trace metals; COD removal;
D O I
10.1205/095758299530071
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The chemical oxygen demand (COD) removal and respiration rates of several samples of activated sludge which were dosed with micronutrient supplements have been compared in this study. Six trace metals and three vitamins were used as chemical additives dosed into the mixed liquor. It was confirmed experimentally that a wastewater stream from a chemicals manufacturing plant did not contain a sufficient supply of macro- or micronutrients for efficient biological treatment. Some of the supplements increased the metabolic rate of the sludge while some decreased it, indicating a range of stimulatory and toxic effects; all of the supplements resulted in increased COD removal rates. Complex interactions between micronutrients that were dosed simultaneously were evident. Control sludge batches (receiving no micronutrient supplements) attained an average COD removal rate of 1.335 kg COD.kg MLSS-1 d(-1). Dosing micronutrients into the mixed liquor produced COD removal rates of up to 4.239 kg COD.kg MLSS-1 d(-1). It was concluded that micronutrient supplements have the potential to optimize biological treatment of industrial wastewaters which are nutrient limited or changeable.
引用
收藏
页码:199 / 204
页数:6
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