Dissertation > Excellent graduate degree dissertation topics show

Research on Removal Efficiency and Removal Pathways of Carbon, Nitrogen, Phosphorus from Piggery Wastewater in Multi-Soil-Layering System

Author: ZhangChunZuo
Tutor: LuoAnCheng
School: Zhejiang University
Course: Plant Nutrition
Keywords: Multi-soil-layering system organic matter removal nitrogen phosphorus piggery wastewater hydraulic loading rate
CLC: X703
Type: Master's thesis
Year: 2010
Downloads: 54
Quote: 0
Read: Download Dissertation

Abstract


As the development of breeding, people pay more attention to the environment pollution that caused by the piggery wastewater, and to the sewage treatment method which utilize of soil resources. In this study, we use the method which used the soil as the main material in the system developed in Japan, it is important for the wastewater treatment in China.The efficiency and the pathway of organic matter, nitrogen, phosphous removal from piggery wastewater was investigated by using MSL system (500 mm x 100 mm×700 mm) made of acrylic. The experiment with 4 MSL systems lasted for 148 days at loading rate of 50,100,200, and 300 L·m-2·day-1. The results obtained were summarized as follows:1. The mean removal rates of organic matter were 74.8%、72.6%、59.5%和33.4% under different loading rates. The result of amounts of organic matter removed in the system showed that remained stable under low loading rates (50、100 L·m-2·day-1) and fluctuated under high loading rates (200、300 L·m-2·day-1). It could be concluded that organic matter in the wastewater could be efficiently removed by the MSL system, and the hydraulic loading rate is an important factor in terms of organic matter removal. The result indicated that biological decomposition process of microorganism is important for the organic matter removal, and adsorption of organic matter onto substrates is also an important process for organic matter removal. It is strongly suggested that MSL with appropriate substrates and at a proper hydraulic loading rate could be applied in the wastewater treatment for organic matter removal.2. The mean removal rates of ammonium nitrogen were 82.1%,71.0%,30.0%, and 18.9%, and the mean removal rates of total nitrogen 44.6%,42.7%,28.4%, and 21.2% under different loading rates, respectively. The result of amounts of nitrogen removed in the system showed that the highest nitrogen removal in quantity occurred at the loading rate of 100 L·m-2·day-1, that’s 94.4 g·m-2·day-1. It could be concluded that nitrogen in the wastewater could be efficiently removed by the MSL system, and the hydraulic loading rate is an important factor in terms of nitrogen removal. The result indicated that adsorption of ammonium nitrogen onto substrates and followed by a nitrification/denitrification process could account for nitrogen removal mechanism. It is strongly suggested that MSL with appropriate substrates and at a proper hydraulic loading rate be applied in the wastewater treatment for nitrogen removal.3. The mean removal rates of phosphorus were 61.4%、56.0%、39.1%和23.0% under different loading rates. The result of amounts of phousphorus removed in the system showed that the phosphorus removal in quantity not very different under different loading rates except in the first three weeks. It could be concluded that phosphorus in the wastewater could be efficiently removed by the MSL system, and the hydraulic loading rate is an important factor in terms of phosphorus removal. The result indicated that adsorption of phosphorus onto substrates could account for nitrogen removal mechanism, and the process of metal irons oxidized into ferric hydroxides is a key factor for adsorption of phosphorus. It is strongly suggested that MSL with appropriate substrates and at a proper hydraulic loading rate be applied in the wastewater treatment for phosphorus removal.

Related Dissertations

  1. Experimental Research on Influence of Coal Reburning Reaction Conditions on NO_x Reduction by Non-Catalytic Reduction of Ammonia,X701
  2. Phosphorus pentoxide composite ammoniated condensing agent preparation of ammonium polyphosphate,TQ314.248
  3. Lake Sediment Accumulation Areas of Yunnan Altiplano Ecological Conditions of Phosphorus and Nitrogen Interactions,X131.2
  4. Cultivation and Effects of Environmental Factors on Carrying WSSV Virus of Litopenaeus Vannamei,S945
  5. Effects of Light, Temperature and Nitrogen on the Growth of Three Kinds of Aquatic Plants,Q945
  6. Yellow phosphorus storage tank area of Safety Evaluation,TQ126.317
  7. Design, Synthesis and Antitumor Activities Study of Quinoxaline-1,4-dioxide Derivatives,R914
  8. Research on the Laws of Nitrogen and Phosphorus Loss and Control Scheme in Eryuan Rural,X712
  9. Effects of Nitrogen Fertilizer on Morphological Development of Alfalfa Root,S541.9
  10. Effects of Water and Nitrogen Coupling on the Water and Nitrogen of Soil and Yield and Quality of Flue-cured Tobacco in Luzhou,S572
  11. Effects of the Nitrogen Management and Interactions with Leaf Number on Growth Yield and Quality of Burley Tobacco,S572
  12. Influence of Biochar Amendments on Decomposition of Soil Organic Carbon and Morphology of Heavy Metal in Red Paddy Soil,S153.6
  13. The Effect of Nitrogen Phosphate and Potassium Proportion Fertilizers on Tea Tree Physiological Metabolism and Tea Quality,S571.1
  14. Optimization Design Andapplication of Extracting Methods of Maize (Zea Mays L.) Volatile Compounds,S513
  15. Nitrogen Regulation and Management on High-yield Wheat-maize Rotation System,S512.1
  16. Effect of Nitrogenapplication Patterns on Variation of Soil Nitrate-N and Grain Yield of Wheat and Maize,S512.11
  17. Concentrations of Lipids in Grains of Japonica Rice: In Response to Nitrogen Fertilizer and in Relation to Physicochemical Properties of Rice Flour,S511.22
  18. Coparative Analyses of Carbon and Nitrogen Metabolism of Flue-cured Tobacco Growing in Henan and Yunnan,S572
  19. Studies on Key Planting Skills of Cigar-Wrapper Tabacco,S572
  20. Study on Nitrogen Accumulation Characteristics of Winter Wheat with Yield of 10t/ha, Diagnosis and Nitrogen Application Technologies,S512.1
  21. Study on Effect of Nutritional Regulation on Pig Production Performance and Discharge of Nitrogen and Phosphorus,S828.5

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
© 2012 www.DissertationTopic.Net  Mobile