{"title":"Long- term Irrigation with Dairy Factory Wastewater Influences Soil Quality","authors":"Yen-Yiu Liu, Richard J. Haynes","volume":46,"journal":"International Journal of Nutrition and Food Engineering","pagesStart":782,"pagesEnd":787,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/14004","abstract":"
The effects of irrigation with dairy factory wastewater on soil properties were investigated at two sites that had received irrigation for > 60 years. Two adjoining paired sites that had never received DFE were also sampled as well as another seven fields from a wider area around the factory. In comparison with paired sites that had not received effluent, long-term wastewater irrigation resulted in an increase in pH, EC, extractable P, exchangeable Na and K and ESP. These changes were related to the use of phosphoric acid, NaOH and KOH as cleaning agents in the factory. Soil organic C content was unaffected by DFE irrigation but the size (microbial biomass C and N) and activity (basal respiration) of the soil microbial community were increased. These increases were attributed to regular inputs of soluble C (e.g. lactose) present as milk residues in the wastewater. Principal component analysis (PCA) of the soils data from all 11sites confirmed that the main effects of DFE irrigation were an increase in exchangeable Na, extractable P and microbial biomass C, an accumulation of soluble salts and a liming effect. PCA analysis of soil bacterial community structure, using PCR-DGGE of 16S rDNA fragments, generally separated individual sites from one another but did not group them according to irrigation history. Thus, whilst the size and activity of the soil microbial community were increased, the structure and diversity of the bacterial community remained unaffected.<\/p>\r\n","references":"[1] T. J. Britz, C. van Schalkwyk, and Y. Hung, \"Treatment of dairy\r\nprocessing wastewaters,\" in Waste Treatment in the Food Processing\r\nIndustry, L. K. Wang, Y. Hung, H.H. Lo, and C. Yapijakis, Eds. Boca\r\nRaton, Taylor Francis, 2006, pp. 1-28.\r\n[2] R. J. Durham, and J. A. Hourigan, \"Waste management and co-product\r\nrecovery in dairy processing,\" in: Handbook of Waste Management and\r\nCo-product Recovery in Food Processing, Vol. 1, K. Waldron, Ed.\r\nCambridge, Woodhead Publishing, 2007, pp. 332-387.\r\n[3] B. P. Degens, L. A. Shipper, J. J. Claydon, J. M. Russell, and G. W.\r\nYeates, \"Irrigation of an allophanic soil with dairy factory effluent for\r\n22 years: response of nutrient storage and soil biota,\" Aust. J. Soil Res.,\r\nvol. 38, pp. 25-35, 2000.\r\n[4] G. P. Sparling, L. A. Shipper, and J. M. Russell, \"Changes in soil\r\nproperties after application of dairy factory effluent to New Zealand\r\nTreatment Microbial biomass C Microbial biomass N Basal respiration Metabolic quotient\r\nmg kg-1 mg kg-1 \u256c\u255dg C g-1 day-1 \u256c\u255dg C mg-1 day-1\r\nControl (1) 164b 30.3a 25.8a 0.16ns\r\nIrrigated control 126a 50.7b 22.3a 0.12\r\nLong-term DFE (1) 261c 70.4c 36.5b 0.14\r\nLong-term DFE (2) 282c 72.8c 34.8b 0.12\r\n(a) (b)\r\nvolcanic ash and pumice soils,\" Aust. J. Soil Res., vol 39, pp. 505-518,\r\n2001.\r\n[5] D. L. Karlen, M. J. Mausbach, J. W. Doran, R. G. Cline, R. F. Harris,\r\nand G. E. Schuman, \"Soil quality: a concept, definition and framework\r\nfor evaluation,\" Soil Sci. Soc. Amer. J., vol. 61, pp. 4-10, 1997.\r\n[6] J. W. Doran, and T. B. Parkin, \"Defining and assessing soil quality,\" in:\r\nDefining Soil Quality for a Sustainable Environment, J. W. Doran, D. C.\r\nColeman, D. F. Bezdiek, and B. A. Stewart, Eds. Madison, Wisconsin,\r\nSoil Science Society of America Special Publication No 35, 1994, pp.3-\r\n21.\r\n[7] E. G. Gregorich, M. R. Carter, J. W. Doran, C. E. Pankhurst, and L. M.\r\nDwyer, \"Biological attributes of soil quality,\" in: Soil Quality for Crop\r\nProduction and Ecosystem Health, E. G. Gregorich, and M. R. Carter,\r\nEds. Amsterdam, Elsevier, 1997, pp. 81-113.\r\n[8] R. F. Isbell, The Australian Soil Classification. Collingwood, Victoria,\r\nCSIRO Publishing, 2002.\r\n[9] C. Gourley, I. Awty, and J. Collins, \"Waste water applications by Bega\r\nCheese and assessment of impacts on soil characteristics,\" Victoria\r\nDepartment of Primary Industries Report to Bega Cheese. Ellinbank,\r\nDepartment of Primary Industries, 2007.\r\n[10] G. E. Rayment, and F. R. Higginson, Australian Laboratory Handbook\r\nof Soil and Water Chemical Methods. Melbourne, Inkata Press, 1992.\r\n[11] G. Muyzer, E. De Waal, and A. G. Uitterlinden, \"Profiling of complex\r\nmicrobial populations by denaturing gradient gel electrophoresis\r\nanalysis of polymerase chain reaction-amplified genes coding for 16S\r\nrRNA,\" Appl. Environ. Microbiol. vol. 59, pp. 695-700, 1993.\r\n[12] fefewa R. F. Isbell, \"The use of sodicity in Australian soil classification\r\nsystems,\" in Australian Sodic Soils. Distribution, Properties and\r\nManagement, R. Naidu, M. E. Sumner, and P. Rengasamy, Eds.\r\nMelbourne, CSIRO Publishing, 1995, pp. 41-45.\r\n[13] R. J. Haynes, and M. H. Beare, \"Aggregation and organic carbon\r\nstorage in meso-thermal, humid soils,\" in Advances in Soil Science.\r\nStructure and Organic Matter Storage in Agricultural Soils, M. R.\r\nCarter, and B. A. Stewart, Eds. Boca Raton, CRC Press, 1996, pp. 213-\r\n262.\r\n[14] K. C. Cameron, H. J. Di, and M. R. Anwar, \"The \"critical\" ESP value:\r\ndoes it change with land application of dairy factory effluent?\" N. Z. J.\r\nAgric. Res. vol. 46, pp.147-154, 2003.\r\n[15] N. Hesketh and P. C. Brookes, \"Development of an indicator for risk of\r\nphosphorus leaching,\" J. Environ. Qual, vol. 29, pp. 105-110, 2000.\r\n[16] J. C. Menneer, C. D. A. McLay, and R. Lee, \"Effects of sodiumcontaminated\r\nwastewater on soil permeability of two New Zealand\r\nsoils,\" Aust. J. Soil Res. vol. 39, pp. 877-882, 2001.\r\n[17] J. C. Wardle, and A. Ghani, \"A critique of the microbial metabolic\r\nquotient (qCO2) as a bioindicator of disturbance and ecosystem\r\ndevelopment,\" Soil Biol. Biochem. vol. 27, pp. 1601-1610, 1995.\r\n[18] Y-Y. Liu, and R. J. Haynes, \"Origin, nature and treatment of effluents\r\nfrom dairy and meat processing factories and the effects of their\r\nirrigation on the quality of agricultural soils\" Crit. Rev. Environ. Sci.\r\nTechnol., to be published, 2010.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 46, 2010"}