The Effect Analysis of Pollution Sources Clearance in Yingnahe Reservoir Area in Dalian / 环境与健康杂志

ABSTRACT

Objective To evaluate the method and result of pollution sources clearance in the reservoir area. Methods Calculated the areas of pollution sources such as pigsties, livestock barns, lavatories, holes for sewage and tombs in the reservoir area of the Yingnahe River, Dalian City after cleared them up in 2002. Collected the soil samples which were not disinfected after clearing up, and the samples disinfected with quicklime or bleaching powder. Evaluation was done according to the GB7959-1987 Standard for the Non-hazardous Treatment of Night Soil. Results The area of pollution source of each livestock barn, pigsty, lavatory, birdhouse, hole for sewage, tomb was 77.4, 74.2, 31.7, 32.1, 36.3 and 158.5 m2 respectively. The qualification rates of the E.coli and the egg of worm counts in the soil samples collected from pollution sources of pigsties disinfected and not disinfected after clearance were 85.94%, 90.31% and 96.88%, 99.38% respectively, the differences were significant. The qualification rates of the E.coli(95.78%)and the egg of worm(99.85%)in the disinfected soil samples collected from the pollution sources in the reservoir area after clearance were close with that of the control collected from the hillside wasteland in the reservoir area. Conclusion Clearance combined with disinfection can make the clearance of pollution sources in the reservoir area meet the request of related standard.