TAILIEUCHUNG - Management of Organic Waste Part 5

Tham khảo tài liệu 'management of organic waste part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 52 Management of Organic Waste Picture 1. Polyurethane carrier with adhered A. simm eggs Picture 2. Perforated plastic nets with the carriers The samples were examined for the pH 1 10 water extract using a pH electrode HACH Company Loveland Colorado USA . Dry matter drying at 105 C to a constant weight residum-on-ignition 550 C for 4 h and water soluble ammonium nitrogen NHU by titration Mulvaney 1996 . Soluble and insoluble substances were determined by evaporation of the known amount of homogeneous sample filtrate on a water bath after The Sanitation of Animal Waste Using Anaerobic stabilization 53 absorption of insoluble substances on a filter drying the evaporation residue at 105 C and determining its weight. COD was determined on the basis of organic substances oxidation in sample by potassium dichromate in sulfuric acid medium during 2-hour boiling in a COD reactor HACH Company Loveland Colorado USA . Portion of samples for Nt determinations were digested using a HACH-Digesdahl apparatus HACH Company Loveland Colorado USA . Nt was distilled with NaOH 40 Bremner 1996 . The c content was calculated according to the content of OM by the method of Navarro et al. 1993 to obtain the C N ratio. Statistical analysis The physical and chemical properties pH DM IM OM NHe Nt of solid animal wastes as well as the number of demaged eggs were expressed as mean values standard deviation X SD . Significance of differences between experimental and control groups of parasites were determined using Student t-test ANOVA and Dunnet Multiple Comparison test at the levels of significance and Statistica . Results a Anaerobic stabilisation of liquid animal wastes Investigations were carried out under operating conditions of the large-capacity pig farm in Slovak Republic Picture 3 . Technological equipment for anaerobic treatment of pig slurry on the principle of methanogenesis with the production of biogas was built up on the farm Picture 4 . Pig slurry was .

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