TOC 기반 가축분뇨 발생 원단위 산정
Estimation of Production Unit Loads of Livestock Manure Based on TOC
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초록
수질오염총량관리 대상물질로 총 유기탄소(Total Organic Carbon, TOC)항목의 적용을 검토 하고 있는 가운데 이 항목에대한 가축분뇨의 발생 및 배출 원단위 확보가 시급한 실정이다. 따라서 본 연구에서는 가축 분뇨 중 수질오염 기여도가가장 높은 것으로 알려진 양돈 분뇨에 대해 TOC를 포함한 원단위를 산정하였다. 4대강 수계의 56개 농장을 대상으로 수계별, 사육방식별, 축사의 형태 및 규모별 양돈 분뇨의 농도, 분뇨 발생량(세척수 포함) 및 부하를 산정하였다. 분뇨 발생량은 한강수계와 낙동강수계에서 모돈 사육이 밀집된 소규모 농장 내 스크래퍼 형태의 축사에서 많은 것으로 나타났고,양돈분뇨 발생량은 전체 수계 평균 7.4 L/두/d로 나타났다. 평균 발생 농도는 TOC가 16,037 mg/L, BOD가 10,559 mg/L,TN이 4,145 mg/L, TP가 503 mg/L로 조사되었으며, 이때 발생 부하는 TOC가 117.1 g/두/일, BOD가 77.1 g/두/일, TN이34.7 g/두/일 그리고 TP가 3.67 g/두/일로 도출되었다.
Abstract
Assessment of pollutant loads for livestock manure based on total organic carbon (TOC) is being required to apply TOC asan indicator in management of total maximum daily loads. In this study, TOC based unit loads of pig manure known ashighly contributing to water pollution assessed. The concentration of pig manure, amount of manure production includingcleaning water, and unit loads were investigated targeting 52 farms according to 4 major river basins, rearing form, farmscale, and piggery form. The manure production was highly generated in scraper type of piggery, in small scaled farmrearing sow, and in Han River basin and Nakdong River basin. The averaged manure production was 7.4 L/head/d in totalriver basins. Averaged concentrations were investigated as TOC 16,037 mg/L, BOD 10,559 mg/L, TN 4,145 mg/L, and TP503 mg/L. Corresponding unit loads were assessed as TOC 117.1 g/head/d, BOD 77.1 g/head/d, TN 34.7 g/head/d, and TP3.67 g/head/d.
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