한자가 중국에서 한국으로 전래된 후 한자의 학습과 사용을 편리하게 하기 위해 한자교육 방면의 동몽 독서물이 대량으로 정리되고 편찬되었다. 󰡔한국유학교육자료집해󰡕 제1권 󰡔동몽교 육편󰡕은 조선시대에 간행된 19종의 동몽 독본을 수록하여 조선시대 민중의 한자에 대한 인식과 문자 사용 실태를 전반적으로 이해하는 데 귀중한 자료를 제공한다. 19종의 한자 동몽 자료는 많은 이체 속자를 사용하여 중국의 한자 사용과 다른 특징을 보여준다. 총체적으로 볼 때 조선시 대 동몽 문헌에 보이는 속자는 크게 두 가지 유형이 있다. 하나는 필획의 증감, 필획의 형태 변화, 간접 부건과 기타 부건의 혼재, 부건 배치의 차이, 초서의 해서화 등의 요인으로 형성된 異寫俗字이고, 다른 하나는 조자 방법의 차이, 조자 방법은 같지만 부건이 다른 경우, 구조적 속성은 같지만 부건 수량이 다르거나 필사의 변이로 인한 구조의 차이 등의 요인으로 형성된 異構俗字이다. 조선시대 동몽 문헌의 속자 사용에서도 주목할 만한 특징이 나타난다. 예컨대 고문과 예서의 정서법을 많이 보존하고 있고, 중국 고대 속자의 변형된 정서법을 전승 및 사용하 고 있으며, 문자의 속자가 체계성을 갖추고 있는 등을 들 수 있다.

The purpose of this sudy is to get characteristics of water quality in separated sewer overflows. In dry weather the water quality of sewage in the outfall of the separated sewer was an average BOD of 2.7 mg/L, CODmn of 4.9 mg/L, TN of 3.8 mg/L, TP of 1.9 mg/L, and SS of 5.3 mg/L, Because the quality except for TP was less than the water quality standard of wastewater treatment plant (WTP), a prevention facility was needed to prevent the sewage inflow to interceptor. When the separated sewer overflows (SSO) were overflowed, the maximum pollutant load was be found to be about from 2.7 to 5.4 times as a BOD base, about from 3.2 to 4.6 times as a SS base higher than average load. There was a big difference according to rainfall intensity and rainfall continuous time. In case the quality of SSO was less than water quality standard or water quality in dry season, SSO was required to discharge to the stream not to inflow to WTP by operating the floodgate in the outfall with water quality data using sensors, such as turbidity sensor, etc. Because removal efficiency by an intercepter load was calculated as low as about 10~20% as a BOD base, removal efficiency could be increased by installing a separated wall within the sewer.

The purpose of this study is to get basic data for the application of coagulants for treating an industrial wastewater containing NBD COD. The NBD COD concentration of the target wastewater was calculated to be 61 mg/L, which was about 72% of the first stage treated water, and this shows that there must be advanced wastewater treatment process. When Alum(8%) was injected in raw the water, 150ppm was the best dosage and 41% CODmn removal efficiency was obtained. When Alum(8%) was injected in the discharge water, 150ppm was the best dosage, and 19% CODmn removal efficiency was obtained. When powdered activated carbon was injected, 40ppm was the best dosage, 26% CODmn removal efficiency was obtained. The method of injecting Alum(8%) in the discharge water was suitable, when the effluent exceeds the water quality standard by 20%, and the method of injecting the powdered activated carbon was suitable, when the effluent exceeds the water quality standard by 20~40%.