EMMC technology for treatment/reuse of dilute dairy wastewater

A rural dairy farm located on the island of Oahu, Hawaii needed to upgrade current lagoon treatment system for further reuse as floor flushing and crop irrigation. This is a comprehensive bench scale and pilot plant study to evaluate the potential biological treatment and reuse systems. Systems evaluated include: (1) pre-existing lagoon system, (2) integrated anaerobic BIO-NEST/aerobic EMMC (entrapped mixed microbial cell) system, (3) aerobic EMMC reactor only system. Based upon a comprehensive economic evaluation and sensitivity analysis, the EMMC-only system achieved the best effluent quality for simultaneous removal of carbon and nitrogen. The pilot study of the EMMC-only reactor achieved an overall of 78% TCOD, 63% SCOD, 65% TN, and 96% soluble NH3-N removal efficiencies (HRT 12 h, continuous aeration). Implementing this system would cost about $0.25 a cow/day to remove a ton of organic TCOD ($88.10/cow/year). The information presented provides a model for animal producers to consider in evaluating alternatives to upgrade existing waste management facilities.

[1]  P. Yang,et al.  EMMC process for combined removal of organics, nitrogen and an odor producing substance. , 2003, Journal of environmental management.

[2]  Liangjie Dong.  An integrated treatment and reuse system of dairy wastewater - a case study in the state of Hawaii , 2003 .

[3]  Luo-Ting Lin,et al.  Comparison of different technologies for dilute milk parlor wastewater treatment and reuse , 2007 .

[4]  P. Yang,et al.  Packed entrapped mixed microbial cell process for removal of phenol and its compounds , 1991 .

[5]  Ping-Yi Yang,et al.  Simultaneous removal of carbon and nitrogen using an entrapped-mixed-microbial-cell process , 1997 .

[6]  N. Bolan,et al.  Nutrient removal from farm effluents. , 2004, Bioresource technology.

[7]  Z. Wang,et al.  Removal of Organic and Nitrogen and Molecular Weight Distribution of Residual Soluble Organic from Entrapped Mixed Microbial Cells and Activated Sludge Processes , 2006, Water environment research : a research publication of the Water Environment Federation.

[8]  K. Cao,et al.  Entrapped Mixed Microbial Cell Process for Combined Secondary and Tertiary Wastewater Treatment , 2002, Water environment research : a research publication of the Water Environment Federation.

[9]  Piyalerg Kongsil.  Engineering and economic evaluation of innovative bioreactor for milk parlor wastewater treatment/reuse , 2006 .

[10]  Y. Watanabe,et al.  Simultaneous Nitrification and Denitrification in Micro-Aerobic Biofilms , 1992 .

[11]  R. Surampalli,et al.  Water reclamation and reuse criteria in the U.S. , 1996 .

[12]  T. Maekawa,et al.  Evaluation of Direct Removal of Nitrate with Entrapped Mixed Microbial Cell Technology Using Ethanol as the Carbon Source , 2001, Water environment research : a research publication of the Water Environment Federation.

[13]  H. D. Stensel,et al.  Wastewater Engineering: Treatment and Reuse , 2002 .