Role of rural solid waste management in non-point source pollution control of Dianchi Lake catchments, China

Abstract

In recent years, with control of the main municipal and industrial point pollution sources and implementation of cleaning for some inner pollution sources in the water body, the discharge of point source pollution decreased gradually, while non-point source pollution has become increasingly distressing in Dianchi Lake catchments. As one of the major targets in non-point source pollution control, an integrated solid waste controlling strategy combined with a technological solution and management system was proposed and implemented based on the waste disposal situation and characteristics of rural solid waste in the demonstration area. As the key technology in rural solid waste treatment, both centralized plant-scale composting and a dispersed farmer-operated waste treating system showed promise in rendering timely benefits in efficiency, large handling capacity, high quality of the end product, as well as good economic return. Problems encountered during multi-substrates co-composting such as pathogens, high moisture content, asynchronism in the decomposition of different substrates, and low quality of the end product can all be tackled. 92.5% of solid waste was collected in the demonstration area, while the treating and recycling ratio reached 87.9%, which prevented 32.2 t nitrogen and 3.9 t phosphorus per year from entering the water body of Dianchi Lake after implementation of the project.

References

1. Feng J A remotesensing study on the soil erosion disaster of Dianchi area in YunnanRemote Sensing Technology and Application 1994 9(2)2629(in Chinese)
2. Yin K Xu B Water resource protection forDianchi basin and its sustainable utilizationResources and Environment in the Yangtze Valley 1995 4(4)331336(in Chinese)
3. Liu Z Peng J Primary investigation of waterquality of the agricultural area in the Dianchi BasinYunnan Environmental Sciences 1996 16(2)69(in Chinese)
4. Yang W Yang S Study on divisions of non pointpollution sources in Dianchi basinYunnanEnvironmental Sciences 1996 15(3)37(in Chinese)
5. Chen N Hong H Cao W et al.Assessment of management practices in a small agriculturalwatershed in southeast ChinaJournal ofEnvironmental Science and Health, Part A 2006 41(7)12571269(in Chinese)
6. Gikas G D Yiannakopoulou T Tsihrintzis V A Water quality trends in a coastal lagoon impacted by non-pointsource pollution after implementation of protective measuresHydrobiologia 2006 563385406
7. Guo Q Ma K Yang L Main sources of urban non-point source pollution and controlmeasures for classified catchmentsEnvironmentalScience 2006 27(11)21702175(in Chinese)
8. O'Geen A T Maynard J J Efficacy of constructed wetlandsto mitigate non-point source pollution from irrigation tailwatersin the San Joaquin Valley, California, USAWater Sci. Technol. 2007 55(3)5561
9. Lu W Wang H Huang D et al.Effect of inoculating flower stalk and vegetablewaste with ligno-cellulolytic microorganisms on the composting processThe Journal of Environmental Science and Health,Part B 2004 B39(5)873889(in Chinese)
10. Chen C Wang Y Ke F Technological research on fermentation efficiency improvementwith straw fertilizerChinese Journal ofSoil Science 1994 25(7)5760(in Chinese)
11. Gao Y Zhu W Chen W The relationship between soil microbial biomass and thetransformation of plant nutrients in straw mulched no-tillage soilsChina Agricultural Sciences 1994 27(6)4149(in Chinese)
12. Wen H Resourceregeneration of agricultural solid waste and barn manure in BeijingBeijing Agricultural Sciences 1995 13(5)811(in Chinese)
13. Kalyunzhnyi S Sklyar V Fedorovich V The development of biological methods for utilization andtreatment of diluted manure streamsWaterSci. Technol. 1999 40(1)223229
14. Li G Sun Y Ding X Effects of composting organic compound fertilizers on vegetablesand soil environmentAgro-environmentalProtection 2000 19(4)200203(in Chinese)
15. Zhang F Dou F Zhou Y Breakthrough on industrialization technology of organicfertilizerSoil Fertilizer 2002 24041(in Chinese)
16. Gogolck P E G Issues and approaches in animal waste utilization in CanadaProceedings of Annual International Pittsburgh CoalConference 2000 1716621670
17. Duan Y Zhang N Analysis on current statusof rural area non-point pollution in Dianchi Lake basinNature ecological conservation 2003 72830(in Chinese)