[pp.217-222]

‹Research Report›Wastewater Handling in Dairy Farm and Zero Emission Approach through Citizen Participatio

Taizo UCHIDA, Kenji NEKOMOTO and Shinji HOSHIBA （Kyushu Sangyo University / Rakuno Gakuen University）

Abstract:
Discharging dairy parlor/ milk house wastewater to surface waters has not been closely prohibited in current Japanese regulations. Investigating the effluent handling in dairy farms in Hamanaka Town representing dairy area of Japan, it was revealed that most of the farms have discharged the effluent to surface waters (79.4% of all). Moreover, such effluents had a tendency to be above the standard in BOD, COD, etc. On the other hand, zero emission approach through citizen participation has started in this town. The aim of this approach was to treat and purify the effluent with the constructed wetland planted Phragmites australis (Cav.) Trin. As an effect of the approach, BOD and COD of the effluent have been lowered with the constructed wetland. Furthermore, the utilization of P. australis in the constructed wetland, retaining nitrogen of the effluent, has also been programmed for producing reed screen, toy, etc. Such zero emission approach through citizen participation would play an important role in establishing a sound material-cycle society in this town.

Key Word:
dairy farm, wastewater treatment, constructed wetland, Phragmites australis (Cav.) Trin., citizen participation

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