Characterization of dairy waste streams, current treatment practices, and potential for biological nutrient removal

被引:139
作者
Danalewich, JR
Papagiannis, TG
Belyea, RL
Tumbleson, ME
Raskin, L [1 ]
机构
[1] Univ Illinois, Dept Civil Engn, Urbana, IL 61801 USA
[2] Univ Missouri, Dept Anim Sci, Columbia, MO 65211 USA
[3] Univ Illinois, Dept Vet Biosci, Urbana, IL 61801 USA
关键词
dairy wastewater; enhanced biological phosphorus removal; biological nutrient removal;
D O I
10.1016/S0043-1354(98)00160-2
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Fifteen milk processing plants in the Upper Midwest of the United States participated in a study to obtain information on general process operation, waste generation and treatment practices, chemical usage, and wastewater characteristics. Long term data on wastewater characteristics were obtained for 8 of the 15 dairy plants, and a 24-h composite wastewater sample was characterized in detail for each plant. Wastewater flow rates and characteristics varied greatly among and within plants and were not easily predictable even when detailed information on processing operations was available. In addition, the contribution of milk and milk products to the waste streams was underestimated by plant operators. The use of caustic soda, phosphoric acid, and nitric acid for cleaning had a significant impact on wastewater characteristics, despite the implementation of changes in chemical usage practices during recent years. In particular, the use of phosphoric acid based cleaning products has been reduced to eliminate or decrease discharge fines. It was determined that most of the on site treatment facilities require renovations and/or operational changes to comply with current and future discharge regulations, especially with respect to nutrient (nitrogen and phosphorus) levels in their waste streams. It was concluded that biological nutrient removal of dairy wastewaters should be feasible given the relatively high concentrations of easily degradable organics, the generally favorable organic matter to total phosphorus ratio, and the very favorable organic matter to nitrogen ratio. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:3555 / 3568
页数:14
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