Thesis (M.S.)--University of Wisconsin--Madison, 1982. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 70-78).

Thesis (M.S.)--Ohio State University, 1985. / Includes bibliographical references (leaves 73-76). Available online via OhioLINK's ETD Center

Thesis (Ph. D.)--Ohio State University, 1974. / Includes bibliographical references (leaves 201-205). Available online via OhioLINK's ETD Center

Liquid anaerobic waste collected from a swine finishing barn was chemically investigated. Various phenols, amines, sulfides and organic acids were identified in the waste and were shown to contribute to its odor. The rapid reduction in odor intensity brought about by short term aeration of the waste was studied with respect to these different compounds. The effectiveness of odor reduction by aeration was found to be contingent on the waste's pH. Reasons for this phenomenon are presented in terms of ionization constants for solutes, previously shown to be present in the waste. / Land and Food Systems, Faculty of / Graduate

A series of batch tests were conducted to evaluate the effect of dissolved oxygen concentration on the aerobic stabilization of swine waste. The batch tests were conducted over a 14 day period and the effect of oxygen concentration was measured by changes in Chemical Oxygen Demand (COD) of the waste. Three, five litre capacity, digesters were used and were held at the following dissolved oxygen concentrations; high O₂ level (15-20 mg/1), medium O₂ level (5-8 mg/1) and low O₂ level (.5- 2 mg/1). The reduction in COD of the waste at the end of one week of oxidation was 48.7% for the high O₂ level, 35.3% for the medium O₂ level and 15.6% for the low O₂ level. The reduction in COD at the end of 14 days of oxidation was 57.8%, 50.7% and 38.9% respectively for the three levels of oxygen. The addition of one litre of aerated swine waste to four litres of the raw swine waste did not appreciably alter the reduction in COD noted in the above tests. The reduction in COD for this batch test was 60.9 for the high O₂ level, 34.6 for the medium O₂ level, and 31.1 for the low O₂ level. In this test all three levels of dissolved oxygen removed approximately the same percentage of filtered COD during the first two days of oxidation. In the high and medium O₂ level digesters this was accompanied by a reduction in total COD. A similar reduction in total COD did not occur at the low O₂ level. Correlations were made with the COD determination and determinations for Total Organic Carbon. These correlations were very high (regression coefficient = .93) when the sample was prepared using a mechanized tissue grinder. Grinding the sample resulted in a higher value for total organic carbon as well as an increase in precision. / Applied Science, Faculty of / Chemical and Biological Engineering, Department of / Graduate

No description available.

Thesis (Ph. D.)--University of Hong Kong, 1996. / Includes bibliographical references (leaf 195-203).

Thesis (Ph.D.)--University of Hong Kong, 1996. / Includes bibliographical references (leaf 195-203). Also available in print.

No description available.

Integrating an intermittent aeration for the treatment of combined dilute and anaerobic digested swine wastewater in a field swine wastewater treatment system was investigated. Four operations models in term of ratio of aeration to no-aeration of 60:36, 5:1, 4:2 and 3:3 hour were evaluated. At the HRT of 3.2 days and ration of aeration to non-aeration of 3:3, the removal efficiency of BOD5, Total-N, TSS and Total-P of 98.0%, 92.4%, 95.6% and 59.4% could be achieved, respectively. The effluent quality of BOD5, NO3ˉ–N, NH4+–N and TSS concentrations were 35±12mg/l, 2.6±0.8 mg/l, 36±28 mg/l and 78±13 mg/l, respectively. The operational criteria were developed for integrating the intermittent aeration in the swine wastewater treatment system (including anaerobic reactors and sedimentation unit). Economical evaluation of the swine wastewater treatment system integrating the intermittent aeration unit was conducted. It was found that break even point was the operation of 166 pigs if the biogas and stabilized sludge were utilized. If the byproducts were not utilized, the cost of the treatment system are $12.30, $7.92, $7.21, $7.06 and $6.09 for the operation of 300, 1000, 2000, 3000 and 5000 pigs per year, respectively. Integrating the intermittent aeration unit in the swine waste treatment system provides the effective odor control, reduction of energy cost and treated wastewater reuse without creating the deterioration of environmental quality. / Thesis (M. S.)--University of Hawaii at Manoa, 1997. / Includes bibliographical references (leaves 172-180).UHM: Has both book and microform. / U.S Geological Survey/ Water Resource Research Institute (FY 95/96)