Optimization of the vermidegradation of cow dung – waste paper mixtures
- Authors: Unuofin, Frank Oshioname
- Date: 2014
- Subjects: Biodegradation , Vermicomposting , Waste paper , Earthworm culture , Phosphatic fertilizers
- Language: English
- Type: Thesis , Doctoral , PhD (Soil Science)
- Identifier: vital:11966 , http://hdl.handle.net/10353/d1021276 , Biodegradation , Vermicomposting , Waste paper , Earthworm culture , Phosphatic fertilizers
- Description: Vermicomposting is an eco-friendly waste management strategy. Its successful performance necessitate that key functioning parameters like earthworm stocking density, nutrient enrichment be established for each target waste/waste mixture. One main target waste mixture in South Africa, and in the University of Fort Hare in particular is waste paper mixed with cow dung and rock phosphate (RP) for phosphorus (P) enrichment. This study was carried out to address the following specific objectives, to determine (i) the effect of Eisenia fetida stocking density on the bioconversion of cow dung waste paper mixtures enriched with rock phosphate, (ii) an optimum application rate of low grade South African Rock Phosphate and time required for efficient vermicomposting of cow dung-waste paper mixtures, and (iii) to determine if the phosphorus in RP is responsible for improved biodegradation during the vermicomposting of cow dung-waste paper mixtures. Results of this study revealed that bioconversion of cow dung waste paper mixtures enriched with RP was highly dependent on E. fetida stocking density and time. The stocking density of 12.5 g-worms kg-1 feedstock of the mixtures resulted in highest earthworm growth rate and humification of the waste mixture as reflected by a C: N ratio of < 12, polymerization index (PI) or humic acid/fulvic acid ratio of > 1.9, and a humification index of >13 for the cow dung waste paper mixtures. A germination test carried out also revealed that the resultant vermicompost had no inhibitory effect on the germination of tomato, carrot, and radish. Extractable P increased with stocking density up to 22.5 g-worm kg-1 feedstock, suggesting that for maximum P release from RP enriched wastes, a high stocking density should be considered. Informed by an earlier study which demonstrated that RP improved vermidegration, a follow up study was done to determine the optimum amount of rock phosphate necessary for efficient vermidegradation of cow dung waste paper mixtures while ensuring a phosphorus rich vermicompost. The results showed that addition of RP at rates ≤ 1% P as RP efficiently enhanced the bioconversion of cow dung waste paper mixtures as reflected by low C: N ratio, high polymerization index (PI), HI and HR used as maturity indicators for matured compost. Final vermicompost products obtained at minimum amounts of RP application rates resulted highly humified vermicompost with finer morphological structure, with no inhibitory effect on the germination of tomato, carrot, and radish similar to the ones obtained at higher RP rates. The findings suggest that 1%P as RP application rate is optimum for efficient vermidegradation of cow dung waste paper mixtures. Since P or Ca happen to be the most prevalent elements in most rock phosphate used for compost enrichment, a study was carried out to determine if P or Ca in RP is predominantly responsible for the improved biodegradation of cow-dung waste paper mixture observed during vermicomposting. Phosphorus sources in form of triple superphosphate (TSP), phosphoric acid (PHA) and Ca in form of calcium chloride (CaCl2) salt were compared with rock phosphate. The results from the study indicated that TSP, a water soluble P source, resulted in greater and faster degradation of the waste mixtures than RP while the Ca source had the least effect. With TSP incorporation the compost maturity C: N ratio of 12 was reached within 28 days while RP, PHA and CaCl2 needed 42, 56 and more than 56 days, respectively. The results indicated that P was largely responsible for the enhanced bioconversion of the waste mixtures. This appeared linked to the effect of P to stimulate microbial growth as reflected by higher microbial biomass carbon levels where water soluble P sources were applied. The C: N ratios of the final vermicomposts at day 56 were 10, 11.5, 13, 14, and 23 for TSP, RP,PHA, Control (No P added) and CaCl2 treatments, respectively. Although TSP gave superior superior performance, RP may still be the preferred additive in the vermicomposting of cow dung waste paper mixtures as it is cheaper and produces mature compost in a shorter period of 8 weeks. Generally, the results of this study have shown that the vemidegradation of cow dung waste paper mixtures can be optimized through adoption of an E. fetida stocking density of 12.5g- worm kg-1 and an RP incorporation rate of 1% P as RP. However, higher rates of RPincorporation may be adopted where final vermicomposts with higher P fertilizer value are desired. Phosphorus appears to be the RP constituent responsible for its ability to enhance the vermidegradation of cow dung waste paper mixtures. Future studies should explore the effectiveness of other P-bearing minerals for their effectiveness in enhancing vemidegradation.
- Full Text:
- Date Issued: 2014
- Authors: Unuofin, Frank Oshioname
- Date: 2014
- Subjects: Biodegradation , Vermicomposting , Waste paper , Earthworm culture , Phosphatic fertilizers
- Language: English
- Type: Thesis , Doctoral , PhD (Soil Science)
- Identifier: vital:11966 , http://hdl.handle.net/10353/d1021276 , Biodegradation , Vermicomposting , Waste paper , Earthworm culture , Phosphatic fertilizers
- Description: Vermicomposting is an eco-friendly waste management strategy. Its successful performance necessitate that key functioning parameters like earthworm stocking density, nutrient enrichment be established for each target waste/waste mixture. One main target waste mixture in South Africa, and in the University of Fort Hare in particular is waste paper mixed with cow dung and rock phosphate (RP) for phosphorus (P) enrichment. This study was carried out to address the following specific objectives, to determine (i) the effect of Eisenia fetida stocking density on the bioconversion of cow dung waste paper mixtures enriched with rock phosphate, (ii) an optimum application rate of low grade South African Rock Phosphate and time required for efficient vermicomposting of cow dung-waste paper mixtures, and (iii) to determine if the phosphorus in RP is responsible for improved biodegradation during the vermicomposting of cow dung-waste paper mixtures. Results of this study revealed that bioconversion of cow dung waste paper mixtures enriched with RP was highly dependent on E. fetida stocking density and time. The stocking density of 12.5 g-worms kg-1 feedstock of the mixtures resulted in highest earthworm growth rate and humification of the waste mixture as reflected by a C: N ratio of < 12, polymerization index (PI) or humic acid/fulvic acid ratio of > 1.9, and a humification index of >13 for the cow dung waste paper mixtures. A germination test carried out also revealed that the resultant vermicompost had no inhibitory effect on the germination of tomato, carrot, and radish. Extractable P increased with stocking density up to 22.5 g-worm kg-1 feedstock, suggesting that for maximum P release from RP enriched wastes, a high stocking density should be considered. Informed by an earlier study which demonstrated that RP improved vermidegration, a follow up study was done to determine the optimum amount of rock phosphate necessary for efficient vermidegradation of cow dung waste paper mixtures while ensuring a phosphorus rich vermicompost. The results showed that addition of RP at rates ≤ 1% P as RP efficiently enhanced the bioconversion of cow dung waste paper mixtures as reflected by low C: N ratio, high polymerization index (PI), HI and HR used as maturity indicators for matured compost. Final vermicompost products obtained at minimum amounts of RP application rates resulted highly humified vermicompost with finer morphological structure, with no inhibitory effect on the germination of tomato, carrot, and radish similar to the ones obtained at higher RP rates. The findings suggest that 1%P as RP application rate is optimum for efficient vermidegradation of cow dung waste paper mixtures. Since P or Ca happen to be the most prevalent elements in most rock phosphate used for compost enrichment, a study was carried out to determine if P or Ca in RP is predominantly responsible for the improved biodegradation of cow-dung waste paper mixture observed during vermicomposting. Phosphorus sources in form of triple superphosphate (TSP), phosphoric acid (PHA) and Ca in form of calcium chloride (CaCl2) salt were compared with rock phosphate. The results from the study indicated that TSP, a water soluble P source, resulted in greater and faster degradation of the waste mixtures than RP while the Ca source had the least effect. With TSP incorporation the compost maturity C: N ratio of 12 was reached within 28 days while RP, PHA and CaCl2 needed 42, 56 and more than 56 days, respectively. The results indicated that P was largely responsible for the enhanced bioconversion of the waste mixtures. This appeared linked to the effect of P to stimulate microbial growth as reflected by higher microbial biomass carbon levels where water soluble P sources were applied. The C: N ratios of the final vermicomposts at day 56 were 10, 11.5, 13, 14, and 23 for TSP, RP,PHA, Control (No P added) and CaCl2 treatments, respectively. Although TSP gave superior superior performance, RP may still be the preferred additive in the vermicomposting of cow dung waste paper mixtures as it is cheaper and produces mature compost in a shorter period of 8 weeks. Generally, the results of this study have shown that the vemidegradation of cow dung waste paper mixtures can be optimized through adoption of an E. fetida stocking density of 12.5g- worm kg-1 and an RP incorporation rate of 1% P as RP. However, higher rates of RPincorporation may be adopted where final vermicomposts with higher P fertilizer value are desired. Phosphorus appears to be the RP constituent responsible for its ability to enhance the vermidegradation of cow dung waste paper mixtures. Future studies should explore the effectiveness of other P-bearing minerals for their effectiveness in enhancing vemidegradation.
- Full Text:
- Date Issued: 2014
The use of performance information in the department of transport, Eastern Cape
- Authors: Mrawusi, Lindelwa Theodorah
- Date: 2014
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:11729 , http://hdl.handle.net/10353/d1018183
- Description: In a global sphere where public management performance has to be monitored and governments held accountable for their performance, performance information use has been advocated to be stratagem to promote accountability and efficient public sector performance. The South African government has also in a bid to ensure accountable, responsive, transparent, participatory, effective and efficient service delivery promoted the use of performance information use. It is in this regard that the current study sought to It is this argument and scholarly contradictions that have given rise to the current study, which sought to investigate the usage of performance information systems (PIs) by managers and public sector officials in promoting good governance, decision making, transparency, accountability and reporting in the transport department in King Williams’ town. It was established from the current study that there is interplay of various factors for the proper utilization of PIs within the public sector and the findings of the study also indicated that PIs are mainly utilized by the top management for making decisions, planning and evaluation. In order to order to carry out the study, deductive logic was used using a quantitative survey methodology. Data was collected through the use of self administered Likert‐styled questionnaires within the King Williams Town Transport Department. The study utilized stratified sampling in selecting the respondents of the study.
- Full Text:
- Date Issued: 2014
- Authors: Mrawusi, Lindelwa Theodorah
- Date: 2014
- Language: English
- Type: Thesis , Masters , MPA
- Identifier: vital:11729 , http://hdl.handle.net/10353/d1018183
- Description: In a global sphere where public management performance has to be monitored and governments held accountable for their performance, performance information use has been advocated to be stratagem to promote accountability and efficient public sector performance. The South African government has also in a bid to ensure accountable, responsive, transparent, participatory, effective and efficient service delivery promoted the use of performance information use. It is in this regard that the current study sought to It is this argument and scholarly contradictions that have given rise to the current study, which sought to investigate the usage of performance information systems (PIs) by managers and public sector officials in promoting good governance, decision making, transparency, accountability and reporting in the transport department in King Williams’ town. It was established from the current study that there is interplay of various factors for the proper utilization of PIs within the public sector and the findings of the study also indicated that PIs are mainly utilized by the top management for making decisions, planning and evaluation. In order to order to carry out the study, deductive logic was used using a quantitative survey methodology. Data was collected through the use of self administered Likert‐styled questionnaires within the King Williams Town Transport Department. The study utilized stratified sampling in selecting the respondents of the study.
- Full Text:
- Date Issued: 2014
An investigation into factors contributing towards teenage pregnancy in secondary schools: a case study in the Elliotdale sub-district
- Authors: Konkco, Eunice Xoliswa
- Date: 2010
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16206 , http://hdl.handle.net/10353/d1016151
- Description: The focus for this study was to determine the factors that contribute towards teenage pregnancy in the Elliotdale sub-district in secondary schools, in the Eastern Cape. The researcher used the qualitative approach to obtain data from a sample of 8 pregnant learners, two departmental officials, four principals, four school governing body members, and four educators in this research. Interviews were conducted to gain first hand information regarding factors that are contributing towards teenage pregnancy in four secondary schools in Elliotdale, a rural area of the Eastern Cape. The theoretical construct framing this study is grounded in the theories of Bandura and Bronfenbrenner who shape an understanding of social cognitive theory and ecological systems theory. In the study poverty was a contributory factor as a result of unemployment. Ignorance, as well as the attitude of the learners towards moral values, were the major concerns and findings noted by the respondents in this study. The study revealed that the Elliotdale district officials are determined to find ways of eliminating the rate of teenage pregnancy in secondary schools; however, the approach by the district towards the implementation of the existing programmes is not effective. The school principals are unaware of the current policies on preventative measures regarding teenage pregnancy in schools.
- Full Text:
- Date Issued: 2010
- Authors: Konkco, Eunice Xoliswa
- Date: 2010
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16206 , http://hdl.handle.net/10353/d1016151
- Description: The focus for this study was to determine the factors that contribute towards teenage pregnancy in the Elliotdale sub-district in secondary schools, in the Eastern Cape. The researcher used the qualitative approach to obtain data from a sample of 8 pregnant learners, two departmental officials, four principals, four school governing body members, and four educators in this research. Interviews were conducted to gain first hand information regarding factors that are contributing towards teenage pregnancy in four secondary schools in Elliotdale, a rural area of the Eastern Cape. The theoretical construct framing this study is grounded in the theories of Bandura and Bronfenbrenner who shape an understanding of social cognitive theory and ecological systems theory. In the study poverty was a contributory factor as a result of unemployment. Ignorance, as well as the attitude of the learners towards moral values, were the major concerns and findings noted by the respondents in this study. The study revealed that the Elliotdale district officials are determined to find ways of eliminating the rate of teenage pregnancy in secondary schools; however, the approach by the district towards the implementation of the existing programmes is not effective. The school principals are unaware of the current policies on preventative measures regarding teenage pregnancy in schools.
- Full Text:
- Date Issued: 2010
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