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Showing 1 to 20 of 23 for “"ammonia N"”.
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Analysis of temporal trends in southern Nevada wastewater pond parameters with an emphasis on ammonia removal
… dissolved oxygen (DO), phosphorus, nitrates, and ammonia. Data on each pond and pond system are presented including pond system comparisons; A major focus of this paper is on ammonia-N removal. Individual pond ammonia-N removal performance is compared to published models. A model based solely on …
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Observations on the Ruminal Protein Degradation Products and the Absorption of Ruminally Derived Free and Peptide-Bound Amino Acids via Ovine Forestomach Epithelia in Vitro
Production of ammonia N, a-amino N, and peptide N was investigated following in vitro ruminal incubation of solvent soybean meal (SBM), dehydrated alfalfa, corn gluten feed, fish meal, distillers dried grains with solubles (DDG), cotton seed meal, brewers fried grains, meat and bone meal, blood …
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Low temperature biological treatment of a high ammonia municipal landfill leachate
… system, has proved to be an efficient method for ammonia nitrogen removal. However, because of the sensitivity of microbial growth to temperature changes, this process may be seriously affected at low temperatures. The objective of this project was to study the effects of low operating …
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Acute toxicity of ammonia and nitrite to Pacific White Shrimp (Litopenaeus vannamei) at low salinities
… in the literature pertaining to the toxicity of ammonia and nitrite to shrimp. This study was conducted to investigate the individual and combined effects of ammonia and nitrite on L. vannamei postlarvae (25-45 days old) at 10 ppt salinity, 28 C and a pH of 7.8. The independent variables were …
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Performance Evaluation of the Town of Monterery Wastewater Treatment Plant Utilizing Subsurface Flow Constructed Wetlands
… (CBOD5) by the SF wetlands and a poor removal of ammonia-N throughout the system. The decreasing removal of CBOD5 appeared to be caused by clogging of the wetland bed media by accumulated solids. The inability to remove the accumulated solids by pumping was shown. Analysis of field data also …
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Intake, Digestibility, Insitu Disappearance and Ruminal Fermentation of Bermuda Grass Hay by Lactating Beef Cows Offered Corn or Hominy Feed as Supplements
… of volatile fatty acids (VFA) and rumen ammonia-N. Hay dry matter intake (DMI) was not affected (<em>P</em> = 0.35) by supplement. Total DMI (kg/d and % of BW) were greater (<em>P</em> < 0.05) for MC and MH compared with the other treatments. Dry matter digestibility did not differ …
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Treatment of Wet Fish Sludge with Vermicomposting
… total phosphorus (TP), sulfate, chlorides, and ammonia-N were greater in filter beds with worms than beds without worms. The worms were crucial to maintaining porosity in the filter beds, hence keeping the filters functioning over time. Worm filter beds removed approximately 100% of the TS, VS, …
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Grazing and Feeding Management of Lactating Dairy Cows
… rumen fluid samples were collected to determine ammonia N and VFA. While grazing, this was repeated at 0.5, 1, 2, 3,...8 h post-corn feeding (0 h). Ruminal pH was similar for both corn supplements and was lowest (5.9 and 5.8) at 5 and 8 h, respectively. Rumen ammonia N concentrations started to …
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Partitioning of nitrogen by lactating cows fed diets varying in nonfibrous carbohydrate and rumen undegradable protein
… containing 27% RUP increased (P ±.01) ruminal ammonia and plasma urea nitrogen (N) with 41 % NFC eliciting higher ammonia N concentrations at each RUP level. Bacterial yields (averaging 220 g/d) were slightly higher when 41% NFC diets were consumed with no dietary effects on efficiency. Flow of …
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Ruminal degradation of protein and carbohydrate using a batch culture system, and response to roughage removal, rumen modifier inclusion and postruminal amino acid supply in feedlot cattle
… cottonseed meal (CSM) and fish meal (FM), and ammonia release was used as an indicator of N degradation. Starch experiments (72-h incubation) used ground corn (GC), steam flaked corn (SFC), barley grain (BG) and wheat middlings (WM), and k[subscript d] was determined by DM disappearance and …
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Yield and nutritional value of orchardgrass as influenced by nitrogen and sulphur fertilization and associated red clover
… and crude protein digestibility. Rumen fluid ammonia-N was increased (P<.05) and butyric acid concentration was decreased (P<.05) linearly by N fertilization.
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Optimization of Biological Nitrogen Removal From Fermented Dairy Manure Using Low Levels of Dissolved Oxygen
… days and was designed to remove inorganic total ammonia nitrogen (TAN) from solids-separated dairy manure. An anaerobic fermenter, upstream of the N removal reactor, produced volatile fatty acids (VFAs), to be used as an electron donor to fuel denitrification, and TAN at a COD:N ratio of 18:1. …
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Using Oligonucleotide Probes to Characterize Nitrification in a Two-Stage Pilot Scale Biological Aerated Filter System
… two-stage (carbon oxidation stage one, ammonia oxidation stage two) fixed film biological aerated filter (BAF) process was operated on-site at a domestic wastewater treatment plant. Over the study period, hydraulic loadings to the system were varied, generating a range of organic and …
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Digestion and utilization of nutrients in diets containing feather meal and (or) supplemental fat by lactating dairy cows
… diets. No changes were seen in rumen pH, rumen ammonia-N, VFA's, or rumen bacteria AA. Intake and fecal output of total, essential, and non-essential AA were greater when cows were fed diets containing feather meal. However, flow of AA to the duodenum, AA absorbed, and AA digestibilities did not …
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Intake, digestion site, extent of digestion and digesta kinetics in grazing lactating cows
… the two diets. Supplemental corn reduced rumen ammonia-N (22 vs 17 mg/dl) and increased N recovery at the duodenum (86 vs 75% of N intake). True Nitrogen digestibility averaged 72% and microbial N flowing to the duodenum was 67% of the total N flow. This results indicated that grazing cows may …
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Varying rumen available carbohydrate and rumen available protein in diets of lactating cattle
… tract nutrient digestibilities, and ruminal pH, ammonia-N, and VFA concentrations in lactating cows. The first study was a response surface design utilizing nine dietary combinations of RAC and RAP. The response surfaces of all milk variables were saddle-shaped. Because of the saddle-shaped …
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Degradable intake protein supplementation through the inclusion of urea in finishing diets containing distillers grains: effects on feedlot cattle performance, ruminal fermentation, and feed digestibility
… cells. Synthesis of MCP basically requires ammonia-N (NH3-N), carbon skeletons, and energy. While the last two are mainly derived from fermentation of dietary carbohydrates, dietary N represents the main NH3-N source. Consequently, DIP requirements represent rumen-degradable N needs for MCP …
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Using cover crops to alleviate compaction in organic grain farms
… (WAS), total carbon (TC), nitrate (N-NO3), ammonia (N-NH4), bray phosphorus (P), and pH was determined each sampling time. Additionally, texture and Proctor determinations were conducted once at the beginning of the study. Greater PR and BD values in the CP areas verified compaction; these …
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Replacing Corn and Soybean Meal in Lactating Dairy Cow Diets with Field Peas (Pisum Sativum)
… to increasing inclusion of peas while rumen ammonia-N had a cubic response. Total volatile fatty acid had a quadratic response with FP24 being the greatest. Propionate and butyrate had cubic responses to increasing inclusion of FP. Acetate, valerate, iso-valerate, and acetate to propionate …
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Effects of supplementing beef cows grazing forages with wheat-based dried distillers’ grains with solubles on animal performance, forage intake & rumen metabolism
… affected (P = 0.20) by treatment diet, but rumen ammonia-N was increased (P < 0.01) by supplementation. The potentially degradable and undegradable forage fractions were affected (P < 0.02) by supplementation, reducing the extent of forage degradation. Also, there was a tendency (P = 0.06) for the …
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