가죽의류 제조공업 1차 화학슬러지로부터 건설자재원료의 생산 = PRODUCTION OF CONSTRUCTIONAL MATERIAL FROM PRIMARY CHEMICAL SLUDGE GENERATED FROM A GARMENT LEATHER MANUFACTURING INDUSTRY

국문 초록 (Abstract)

가죽의류 제조공업으로부터 발생된 폐수는 COD 3094mg/l, BOD 980mg/l, TOC 1133mg/l, VFA 840mg/l, 게다가 pH 산도 5.65와 타닌 50mg/l 를 함유한다. 폐수의 물리적처리 구성은 화학적 처리
COD 1890mg/l, BOD 690mg/l, TOC 734mg/l, 타닌 10mg/l 로 감소하였다. 슬러지는 가죽의류제조 1ton당 800kg 이 발생한다. 1차 화학슬러지로부터 다른 pH의 침출수는 BOD 100-240mg/l, COD 351-2544 mg/l, 타닌 44-161 mg/l, Cr3+ 0.5-19 mg/l, 철 2-25 mg/l, pH1-11 로 나타났다. 토양 침출수의 환경부하는 batch 와 고정식 흡착실험에 의해 조사 되었다.
침출수의 요소는 공동확산작용, 활성에너지, COD, TDS, Chromium, 타닌에 의해 결정되어졌다. 1차 화학슬러지에서 생산된 석회가루는 시멘트, 비산재,석회의 같은 비율의 무게로 혼합하였다. 혼합구성; 생석회슬러지: 점토: 시멘트, 생석회슬러지: 비산재 : 시멘트, 생석회슬러지 : 비산재: 석회 : 시멘트, 생석회슬러지 : 비산재 : 점토 : 시멘트, 생석회슬러지 : 비산재 : 점토: 시멘트 : 석회.
위의 혼합으로 주조한 벽돌은 습한 대기상태에서 28일간 양생 되었다. 벽돌은 중금속과 유기물에 관계된 다른pH상태에서 침출수 특성과 압축강도 시험을 하였다.
1차 화학슬러지에서 석회와 벽돌제조의 처분의 경제성에 대해 토의한다.

다국어 초록 (Multilingual Abstract)

Wastewater generated from garment leather manufacturing industry contained COD 3094mg/l, BOD 980mg/l, TOC 1133mg/l, VFA 840mg/l, in addition to acidic pH 5.65 and tannin 50 mg/1. Physical treatment of wastewater consisted of equalization cum settling followed by chemical treatment with Ferric Chloride to remove tannin and lime to neutralize the wastewater. COD was reduced to 1890, BOD to 690 mg/1 and TOC to 734 mg/1 and tannin to 10 mg/1. The sludge production was 800 Kg per ton of the garment leather manufactured. The leachates at different pH from the primary chemical sludge was characterized were BOD 100-240 mg/1, COD 351-2544 mg/1, Tannin 44-161 mg/1, Cr3+ the range of 0.5 - 19 mg/1 and Iron in the range of 2-25 mg/1 over the pH range of 1-11. The environmental impact of the leachates on soil was investigated under batch and fixed bed adsorption studies. The diffusion coefficient and energy of activation of the leachate components in terms of COD, TDS, Chromium and tannin were determined. The primary chemical sludge was calcined under controlled atmosphere in an electric furnace. The calcined product of the primary chemical sludge was blended by Portland cement, Fly ash, Lime in the following combination; Calcined sludge: Clay: Cement, Calcined sludge: Fly ash : Cement, Calcined sludge : Fly ash: Lime: Cement, Calcined sludge : Fly ash : Clay : Cement, Calcined sludge : Fly ash: Clay: Cement: Lime in fixed ratio by weight. The bricks casts from the above mixtures were cured for 28 days under controlled humid atmosphere. The bricks were tested for their compressive strength and leaching characteristics under different pH conditions with reference to heavy metals and organics. The economics of the disposal of primary chemical sludge through calcinations and brick making is discussed.