畜産廢水 Sludge의 有機物 除去를 위한 嫌氣性 處理에 관한 硏究 = A study on the Anaerobic Digestion for Organic matter exclusion of Livestock Wastewater Sludge

다국어 초록 (Multilingual Abstract)

Importance of livestock wastewater productions contain only 1％ from total occurrence quantities in our country, it should be prepared the provisions expeditiously because the pollutant loading rate is very high as 9％ from total pollutant loading of BOD.
In the characteristics of the piggery wastewater, it has become main sources of pollution, which is resulted eutrophication from rivers and lakes, as both organic and nitrogen concentrations are high. In this treatise, it should be considered as follows: first, the design parameters for effective treatment derives from observation of the physical-chemical characteristics of piggery wastewater and the concentration variation depends on seasonal change, second, the organics in the digestion tank during the digestion time of anaerobic digestion for the organic removal of high concentrations in the primary sedimentation tanks of piggery wastewater and the conduct if nutrient.
It should be also considered methane which is product of anaerobic digestion. The BOD removal of the digestion process about 12days in organics is 72％, resulted COD removal is 36％. Ammonia nitrogen removal of the digestion process of 20day 57％, according to the increase of ammonia nitrogen, one of the digestion process of 40day is 47％, therefore, removal efficiency is decreased.
It is considered that the difference of minimized point is wide range, according to mixing, difference of velocity reaches to maximum gas production is, however, narrow.
As the water use which is used in combined piggery enters to the primary sedimentation tank, pH of piggery wastewater is reported from 7.14 to 8.86.