The Experts below are selected from a list of 13782 Experts worldwide ranked by ideXlab platform
Zengqiang Zhang - One of the best experts on this subject based on the ideXlab platform.
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new insight of tertiary amine modified bentonite amendment on the nitrogen transformation and volatile fatty acids during the chicken manure Composting
Bioresource Technology, 2018Co-Authors: Xiuna Ren, Mukesh Kumar Awasthi, Quan Wang, Junchao Zhao, Hongyu Chen, Sanjeev Kumar Awasthi, Zengqiang ZhangAbstract:Abstract In this study, the main objective was to investigate the potential effect of tertiary-amine modified bentonite (TAMB) on the nitrogen transformation and the volatile fatty acids (VFAs) degradation during the chicken manure (CM) Composting. Six dosages of TAMB (0%, 2%, 4%, 6%, 8% and 10%) were amended into the mixture of CM and wheat straw and then Composted for 50 days. The results revealed the TAMB amendment could prolong the thermophilic phase and enhance the organic matter (OM) degradation. With the increasing dosage of TAMB, the ammonia volatilization was reduced by 15.41%–65.35%. Meanwhile, the TAMB addition had a positive effect on VFAs degradation and reducing odor unitMAX (OUMAX) by 17.61%–59.24%. Moreover, CH4 was reduced by 12.15%–32.78% in TAMB applied treatments compared to control. Finally, combined with all results, it indicated that TAMB amendment could reduce VFAs, CH4 emission and nitrogen loss to improve the Compost Quality.
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beneficial effect of mixture of additives amendment on enzymatic activities organic matter degradation and humification during biosolids co Composting
Bioresource Technology, 2018Co-Authors: Mukesh Kumar Awasthi, Quan Wang, Xiuna Ren, Junchao Zhao, Meijing Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Zengqiang ZhangAbstract:The objective of this study was to identify the effect of mixture of additives to improve the enzymatic activities, organic matter humification and diminished the bioavailability of heavy metals (HMs) during biosolids co-Composting. In this study, zeolite (Z) (10%, 15% and 30%) with 1%lime (L) (dry weight basis of biosolids) was blended into the mixture of biosolids and wheat straw, respectively. The without any amendment and 1%lime applied treatments were run for comparison (Control). The Z+L addition resulted rapid organic matter degradation and humification with maximum enzymatic activities. In addition, higher dosage of Z+1%L amendment reduced the bioavailability of HMs (Cu and Zn) and improved the end product Quality as compared to control and 1%L applied treatments. However, the 30%Z+1%L applied treatment showed maximum humification and low bioavailability of HMs but considering the economic feasibility and Compost Quality results, the treatment with 10%Z+1%L is recommended for biosolids co-Composting.
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comparison of biochar zeolite and their mixture amendment for aiding organic matter transformation and nitrogen conservation during pig manure Composting
Bioresource Technology, 2017Co-Authors: Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Meijing Wang, Zhen Wang, Hongyu Chen, Zengqiang ZhangAbstract:The aim of this work was to compare the impact of biochar, zeolite and their mixture on nitrogen conservation and organic matter transformation during pig manure (PM) Composting. Four treatments were set-up from PM mixed with wheat straw and then applied 10% biochar (B), 10% zeolite (Z) and 10% biochar+10% zeolite (B+Z) into Composting mixtures (dry weight basis), while treatment without additives applied used as control. Results indicated that adding B, Z and B+Z could obviously (p<0.05) improve the organic matter degradation and decrease the nitrogen loss. And combined addition of B and Z further promoted the organic matter humification and reduced the heavy metals mobility. Meanwhile the highest mitigation of ammonia (63.40%) and nitrogen dioxide (78.13%) emissions was observed in B+Z added treatment. Comparison of organic matter transformation, nitrogen conservation and Compost Quality indicated that the combined use of biochar and zeolite could be more useful for PM Composting.
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improvement of pig manure Compost lignocellulose degradation organic matter humification and Compost Quality with medical stone
Bioresource Technology, 2017Co-Authors: Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Meijing Wang, Zhen Wang, Zengqiang ZhangAbstract:The present study aimed to investigate the effect of different concentrations (0%, 2.5%, 5.0%, 7.5% and 10.0%) of medical stone (MS) on the lignocellulose degradation and organic matter humification during pig manure (PM) Composting. The results indicated that the addition of MS drastically promoted the organic carbon and lignin degradation. Compared to the control, the decomposition rate of hemicellulose and cellulose was increased by 9.64-27.08% and 2.11-12.07% in MS added treatments. Meanwhile, MS amendment significantly improved the humification of Composting process, and the humic acid contents in MS added treatments were 5.58-9.75% higher than control. The FTIR and synchronous fluorescence spectra indicated that the aromatization of final Compost was promoted with increasing the MS amount. In addition, the application of MS blended Composts could significantly improve the biomass and chlorophyll content of pachoi (Brassica chinensis L.). Due to the effective performance of MS, the 10.0% MS was suggested for PM Composting.
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evaluation of biochar amended biosolids co Composting to improve the nutrient transformation and its correlation as a function for the production of nutrient rich Compost
Bioresource Technology, 2017Co-Authors: Mukesh Kumar Awasthi, Quan Wang, Xiuna Ren, Junchao Zhao, Meijing Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Di Guo, Xining Sun, Zengqiang ZhangAbstract:The influence of biochar amended dewatered fresh sewage sludge (DFSS)-wheat straw co-Composting on nutrients transformation and end products Quality was investigated. This is the first study to examine the biochar applied Compost Quality with different kgha-1 TKN on Brassica rapa L. growth. Seven mixtures were Composted over 8-weeks period in 130-L reactor using the same DFSS with different concentration of biochar (2%, 4%, 6%, 8%, 12% and 18% on dry weight basis) and without additive added treatment served as control. The results indicated that Compost with 8-12% biochar became more humified within 35days of Composting, and the Compost maturity parameters also showed that this could be much more feasible approach to increased water-soluble nutrients including NO3, DOC, DON, PO43-, K+ and Na+, but bioavailability of Cu, Zn, Ni and Pb content reduced as compared to control. Finally, results showed that 8-12% biochar was recommended for DFSS Composting and 150kgha-1 TKN of Compost dosages for organic farming.
Mukesh Kumar Awasthi - One of the best experts on this subject based on the ideXlab platform.
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new insight of tertiary amine modified bentonite amendment on the nitrogen transformation and volatile fatty acids during the chicken manure Composting
Bioresource Technology, 2018Co-Authors: Xiuna Ren, Mukesh Kumar Awasthi, Quan Wang, Junchao Zhao, Hongyu Chen, Sanjeev Kumar Awasthi, Zengqiang ZhangAbstract:Abstract In this study, the main objective was to investigate the potential effect of tertiary-amine modified bentonite (TAMB) on the nitrogen transformation and the volatile fatty acids (VFAs) degradation during the chicken manure (CM) Composting. Six dosages of TAMB (0%, 2%, 4%, 6%, 8% and 10%) were amended into the mixture of CM and wheat straw and then Composted for 50 days. The results revealed the TAMB amendment could prolong the thermophilic phase and enhance the organic matter (OM) degradation. With the increasing dosage of TAMB, the ammonia volatilization was reduced by 15.41%–65.35%. Meanwhile, the TAMB addition had a positive effect on VFAs degradation and reducing odor unitMAX (OUMAX) by 17.61%–59.24%. Moreover, CH4 was reduced by 12.15%–32.78% in TAMB applied treatments compared to control. Finally, combined with all results, it indicated that TAMB amendment could reduce VFAs, CH4 emission and nitrogen loss to improve the Compost Quality.
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beneficial effect of mixture of additives amendment on enzymatic activities organic matter degradation and humification during biosolids co Composting
Bioresource Technology, 2018Co-Authors: Mukesh Kumar Awasthi, Quan Wang, Xiuna Ren, Junchao Zhao, Meijing Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Zengqiang ZhangAbstract:The objective of this study was to identify the effect of mixture of additives to improve the enzymatic activities, organic matter humification and diminished the bioavailability of heavy metals (HMs) during biosolids co-Composting. In this study, zeolite (Z) (10%, 15% and 30%) with 1%lime (L) (dry weight basis of biosolids) was blended into the mixture of biosolids and wheat straw, respectively. The without any amendment and 1%lime applied treatments were run for comparison (Control). The Z+L addition resulted rapid organic matter degradation and humification with maximum enzymatic activities. In addition, higher dosage of Z+1%L amendment reduced the bioavailability of HMs (Cu and Zn) and improved the end product Quality as compared to control and 1%L applied treatments. However, the 30%Z+1%L applied treatment showed maximum humification and low bioavailability of HMs but considering the economic feasibility and Compost Quality results, the treatment with 10%Z+1%L is recommended for biosolids co-Composting.
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comparison of biochar zeolite and their mixture amendment for aiding organic matter transformation and nitrogen conservation during pig manure Composting
Bioresource Technology, 2017Co-Authors: Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Meijing Wang, Zhen Wang, Hongyu Chen, Zengqiang ZhangAbstract:The aim of this work was to compare the impact of biochar, zeolite and their mixture on nitrogen conservation and organic matter transformation during pig manure (PM) Composting. Four treatments were set-up from PM mixed with wheat straw and then applied 10% biochar (B), 10% zeolite (Z) and 10% biochar+10% zeolite (B+Z) into Composting mixtures (dry weight basis), while treatment without additives applied used as control. Results indicated that adding B, Z and B+Z could obviously (p<0.05) improve the organic matter degradation and decrease the nitrogen loss. And combined addition of B and Z further promoted the organic matter humification and reduced the heavy metals mobility. Meanwhile the highest mitigation of ammonia (63.40%) and nitrogen dioxide (78.13%) emissions was observed in B+Z added treatment. Comparison of organic matter transformation, nitrogen conservation and Compost Quality indicated that the combined use of biochar and zeolite could be more useful for PM Composting.
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improvement of pig manure Compost lignocellulose degradation organic matter humification and Compost Quality with medical stone
Bioresource Technology, 2017Co-Authors: Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Meijing Wang, Zhen Wang, Zengqiang ZhangAbstract:The present study aimed to investigate the effect of different concentrations (0%, 2.5%, 5.0%, 7.5% and 10.0%) of medical stone (MS) on the lignocellulose degradation and organic matter humification during pig manure (PM) Composting. The results indicated that the addition of MS drastically promoted the organic carbon and lignin degradation. Compared to the control, the decomposition rate of hemicellulose and cellulose was increased by 9.64-27.08% and 2.11-12.07% in MS added treatments. Meanwhile, MS amendment significantly improved the humification of Composting process, and the humic acid contents in MS added treatments were 5.58-9.75% higher than control. The FTIR and synchronous fluorescence spectra indicated that the aromatization of final Compost was promoted with increasing the MS amount. In addition, the application of MS blended Composts could significantly improve the biomass and chlorophyll content of pachoi (Brassica chinensis L.). Due to the effective performance of MS, the 10.0% MS was suggested for PM Composting.
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evaluation of biochar amended biosolids co Composting to improve the nutrient transformation and its correlation as a function for the production of nutrient rich Compost
Bioresource Technology, 2017Co-Authors: Mukesh Kumar Awasthi, Quan Wang, Xiuna Ren, Junchao Zhao, Meijing Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Di Guo, Xining Sun, Zengqiang ZhangAbstract:The influence of biochar amended dewatered fresh sewage sludge (DFSS)-wheat straw co-Composting on nutrients transformation and end products Quality was investigated. This is the first study to examine the biochar applied Compost Quality with different kgha-1 TKN on Brassica rapa L. growth. Seven mixtures were Composted over 8-weeks period in 130-L reactor using the same DFSS with different concentration of biochar (2%, 4%, 6%, 8%, 12% and 18% on dry weight basis) and without additive added treatment served as control. The results indicated that Compost with 8-12% biochar became more humified within 35days of Composting, and the Compost maturity parameters also showed that this could be much more feasible approach to increased water-soluble nutrients including NO3, DOC, DON, PO43-, K+ and Na+, but bioavailability of Cu, Zn, Ni and Pb content reduced as compared to control. Finally, results showed that 8-12% biochar was recommended for DFSS Composting and 150kgha-1 TKN of Compost dosages for organic farming.
Quan Wang - One of the best experts on this subject based on the ideXlab platform.
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new insight of tertiary amine modified bentonite amendment on the nitrogen transformation and volatile fatty acids during the chicken manure Composting
Bioresource Technology, 2018Co-Authors: Xiuna Ren, Mukesh Kumar Awasthi, Quan Wang, Junchao Zhao, Hongyu Chen, Sanjeev Kumar Awasthi, Zengqiang ZhangAbstract:Abstract In this study, the main objective was to investigate the potential effect of tertiary-amine modified bentonite (TAMB) on the nitrogen transformation and the volatile fatty acids (VFAs) degradation during the chicken manure (CM) Composting. Six dosages of TAMB (0%, 2%, 4%, 6%, 8% and 10%) were amended into the mixture of CM and wheat straw and then Composted for 50 days. The results revealed the TAMB amendment could prolong the thermophilic phase and enhance the organic matter (OM) degradation. With the increasing dosage of TAMB, the ammonia volatilization was reduced by 15.41%–65.35%. Meanwhile, the TAMB addition had a positive effect on VFAs degradation and reducing odor unitMAX (OUMAX) by 17.61%–59.24%. Moreover, CH4 was reduced by 12.15%–32.78% in TAMB applied treatments compared to control. Finally, combined with all results, it indicated that TAMB amendment could reduce VFAs, CH4 emission and nitrogen loss to improve the Compost Quality.
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beneficial effect of mixture of additives amendment on enzymatic activities organic matter degradation and humification during biosolids co Composting
Bioresource Technology, 2018Co-Authors: Mukesh Kumar Awasthi, Quan Wang, Xiuna Ren, Junchao Zhao, Meijing Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Zengqiang ZhangAbstract:The objective of this study was to identify the effect of mixture of additives to improve the enzymatic activities, organic matter humification and diminished the bioavailability of heavy metals (HMs) during biosolids co-Composting. In this study, zeolite (Z) (10%, 15% and 30%) with 1%lime (L) (dry weight basis of biosolids) was blended into the mixture of biosolids and wheat straw, respectively. The without any amendment and 1%lime applied treatments were run for comparison (Control). The Z+L addition resulted rapid organic matter degradation and humification with maximum enzymatic activities. In addition, higher dosage of Z+1%L amendment reduced the bioavailability of HMs (Cu and Zn) and improved the end product Quality as compared to control and 1%L applied treatments. However, the 30%Z+1%L applied treatment showed maximum humification and low bioavailability of HMs but considering the economic feasibility and Compost Quality results, the treatment with 10%Z+1%L is recommended for biosolids co-Composting.
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comparison of biochar zeolite and their mixture amendment for aiding organic matter transformation and nitrogen conservation during pig manure Composting
Bioresource Technology, 2017Co-Authors: Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Meijing Wang, Zhen Wang, Hongyu Chen, Zengqiang ZhangAbstract:The aim of this work was to compare the impact of biochar, zeolite and their mixture on nitrogen conservation and organic matter transformation during pig manure (PM) Composting. Four treatments were set-up from PM mixed with wheat straw and then applied 10% biochar (B), 10% zeolite (Z) and 10% biochar+10% zeolite (B+Z) into Composting mixtures (dry weight basis), while treatment without additives applied used as control. Results indicated that adding B, Z and B+Z could obviously (p<0.05) improve the organic matter degradation and decrease the nitrogen loss. And combined addition of B and Z further promoted the organic matter humification and reduced the heavy metals mobility. Meanwhile the highest mitigation of ammonia (63.40%) and nitrogen dioxide (78.13%) emissions was observed in B+Z added treatment. Comparison of organic matter transformation, nitrogen conservation and Compost Quality indicated that the combined use of biochar and zeolite could be more useful for PM Composting.
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improvement of pig manure Compost lignocellulose degradation organic matter humification and Compost Quality with medical stone
Bioresource Technology, 2017Co-Authors: Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Meijing Wang, Zhen Wang, Zengqiang ZhangAbstract:The present study aimed to investigate the effect of different concentrations (0%, 2.5%, 5.0%, 7.5% and 10.0%) of medical stone (MS) on the lignocellulose degradation and organic matter humification during pig manure (PM) Composting. The results indicated that the addition of MS drastically promoted the organic carbon and lignin degradation. Compared to the control, the decomposition rate of hemicellulose and cellulose was increased by 9.64-27.08% and 2.11-12.07% in MS added treatments. Meanwhile, MS amendment significantly improved the humification of Composting process, and the humic acid contents in MS added treatments were 5.58-9.75% higher than control. The FTIR and synchronous fluorescence spectra indicated that the aromatization of final Compost was promoted with increasing the MS amount. In addition, the application of MS blended Composts could significantly improve the biomass and chlorophyll content of pachoi (Brassica chinensis L.). Due to the effective performance of MS, the 10.0% MS was suggested for PM Composting.
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evaluation of biochar amended biosolids co Composting to improve the nutrient transformation and its correlation as a function for the production of nutrient rich Compost
Bioresource Technology, 2017Co-Authors: Mukesh Kumar Awasthi, Quan Wang, Xiuna Ren, Junchao Zhao, Meijing Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Di Guo, Xining Sun, Zengqiang ZhangAbstract:The influence of biochar amended dewatered fresh sewage sludge (DFSS)-wheat straw co-Composting on nutrients transformation and end products Quality was investigated. This is the first study to examine the biochar applied Compost Quality with different kgha-1 TKN on Brassica rapa L. growth. Seven mixtures were Composted over 8-weeks period in 130-L reactor using the same DFSS with different concentration of biochar (2%, 4%, 6%, 8%, 12% and 18% on dry weight basis) and without additive added treatment served as control. The results indicated that Compost with 8-12% biochar became more humified within 35days of Composting, and the Compost maturity parameters also showed that this could be much more feasible approach to increased water-soluble nutrients including NO3, DOC, DON, PO43-, K+ and Na+, but bioavailability of Cu, Zn, Ni and Pb content reduced as compared to control. Finally, results showed that 8-12% biochar was recommended for DFSS Composting and 150kgha-1 TKN of Compost dosages for organic farming.
Lu Zhang - One of the best experts on this subject based on the ideXlab platform.
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influence of sugar beet pulp and paper waste as bulking agents on physical chemical and microbial properties during green waste Composting
Bioresource Technology, 2018Co-Authors: Lu ZhangAbstract:Abstract Composting is considered to be a natural, sustainable, and highly beneficial method for solid waste disposal. The objective of this study was to investigate the two-stage Composting of green waste (GW) as affected by the addition of sugar beet pulp (SBP; at 0, 25, and 35%) and/or paper waste (PW; at 0, 5, and 10%) as bulking agents. The combination of SBP and PW greatly improved the Composting conditions and the final Compost Quality in terms of Composting temperature; pH; emissions of ammonia, nitrite nitrogen, and carbon dioxide; lignocellulose degradation; microbial abundance; enzyme activities; particle-size distribution; the ratio of water-soluble organic carbon to organic nitrogen; and phytotoxicity. The optimal two-stage Composting process of GW and the highest Quality Compost product were obtained with the combination of 25% SBP and 10% PW. This optimal combination of bulking agents produced a mature and stable final Compost product in only 20 days.
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addition of fish pond sediment and rock phosphate enhances the Composting of green waste
Bioresource Technology, 2017Co-Authors: Lu ZhangAbstract:Abstract The objective of this work was to study the two-stage Composting of green waste (GW) as affected by addition of fish pond sediment (FPS; at 0, 25, and 35%) and/or rock phosphate (RP; at 0, 10, and 15%). The combined addition of FPS and RP greatly accelerated GW degradation and improved Compost Quality in terms of Composting temperature, windrow volume, pH, electrical conductivity (EC), cation exchange capacity (CEC), NH 3 emission, microbial biomass, enzyme activities, nutrient content, and seed germination. The two-stage Composting was optimal with the combined addition of 25% FPS and 15% RP. In addition to producing the highest Quality Compost product, the optimal combination resulted a mature Compost in only 22 days rather than in the 90–270 days required with traditional Composting.
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changes in physical chemical and microbiological properties during the two stage co Composting of green waste with spent mushroom Compost and biochar
Bioresource Technology, 2014Co-Authors: Lu Zhang, Xiangyang SunAbstract:This research determined whether the two-stage co-Composting can be used to convert green waste (GW) into a useful Compost. The GW was co-Composted with spent mushroom Compost (SMC) (at 0%, 35%, and 55%) and biochar (BC) (at 0%, 20%, and 30%). The combined addition of SMC and BC greatly increased the nutrient contents of the Compost product and also improved the Compost Quality in terms of Composting temperature, particle-size distribution, free air space, cation exchange capacity, nitrogen transformation, organic matter degradation, humification, element contents, abundance of aerobic heterotrophs, dehydrogenase activity, and toxicity to germinating seeds. The addition of 35% SMC and 20% BC to GW (dry weight % of initial GW) and the two-stage co-Composting technology resulted in the production of the highest Quality Compost product in only 24 days rather than the 90-270 days required with traditional Composting.
Xiuna Ren - One of the best experts on this subject based on the ideXlab platform.
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new insight of tertiary amine modified bentonite amendment on the nitrogen transformation and volatile fatty acids during the chicken manure Composting
Bioresource Technology, 2018Co-Authors: Xiuna Ren, Mukesh Kumar Awasthi, Quan Wang, Junchao Zhao, Hongyu Chen, Sanjeev Kumar Awasthi, Zengqiang ZhangAbstract:Abstract In this study, the main objective was to investigate the potential effect of tertiary-amine modified bentonite (TAMB) on the nitrogen transformation and the volatile fatty acids (VFAs) degradation during the chicken manure (CM) Composting. Six dosages of TAMB (0%, 2%, 4%, 6%, 8% and 10%) were amended into the mixture of CM and wheat straw and then Composted for 50 days. The results revealed the TAMB amendment could prolong the thermophilic phase and enhance the organic matter (OM) degradation. With the increasing dosage of TAMB, the ammonia volatilization was reduced by 15.41%–65.35%. Meanwhile, the TAMB addition had a positive effect on VFAs degradation and reducing odor unitMAX (OUMAX) by 17.61%–59.24%. Moreover, CH4 was reduced by 12.15%–32.78% in TAMB applied treatments compared to control. Finally, combined with all results, it indicated that TAMB amendment could reduce VFAs, CH4 emission and nitrogen loss to improve the Compost Quality.
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beneficial effect of mixture of additives amendment on enzymatic activities organic matter degradation and humification during biosolids co Composting
Bioresource Technology, 2018Co-Authors: Mukesh Kumar Awasthi, Quan Wang, Xiuna Ren, Junchao Zhao, Meijing Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Zengqiang ZhangAbstract:The objective of this study was to identify the effect of mixture of additives to improve the enzymatic activities, organic matter humification and diminished the bioavailability of heavy metals (HMs) during biosolids co-Composting. In this study, zeolite (Z) (10%, 15% and 30%) with 1%lime (L) (dry weight basis of biosolids) was blended into the mixture of biosolids and wheat straw, respectively. The without any amendment and 1%lime applied treatments were run for comparison (Control). The Z+L addition resulted rapid organic matter degradation and humification with maximum enzymatic activities. In addition, higher dosage of Z+1%L amendment reduced the bioavailability of HMs (Cu and Zn) and improved the end product Quality as compared to control and 1%L applied treatments. However, the 30%Z+1%L applied treatment showed maximum humification and low bioavailability of HMs but considering the economic feasibility and Compost Quality results, the treatment with 10%Z+1%L is recommended for biosolids co-Composting.
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comparison of biochar zeolite and their mixture amendment for aiding organic matter transformation and nitrogen conservation during pig manure Composting
Bioresource Technology, 2017Co-Authors: Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Meijing Wang, Zhen Wang, Hongyu Chen, Zengqiang ZhangAbstract:The aim of this work was to compare the impact of biochar, zeolite and their mixture on nitrogen conservation and organic matter transformation during pig manure (PM) Composting. Four treatments were set-up from PM mixed with wheat straw and then applied 10% biochar (B), 10% zeolite (Z) and 10% biochar+10% zeolite (B+Z) into Composting mixtures (dry weight basis), while treatment without additives applied used as control. Results indicated that adding B, Z and B+Z could obviously (p<0.05) improve the organic matter degradation and decrease the nitrogen loss. And combined addition of B and Z further promoted the organic matter humification and reduced the heavy metals mobility. Meanwhile the highest mitigation of ammonia (63.40%) and nitrogen dioxide (78.13%) emissions was observed in B+Z added treatment. Comparison of organic matter transformation, nitrogen conservation and Compost Quality indicated that the combined use of biochar and zeolite could be more useful for PM Composting.
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improvement of pig manure Compost lignocellulose degradation organic matter humification and Compost Quality with medical stone
Bioresource Technology, 2017Co-Authors: Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Meijing Wang, Zhen Wang, Zengqiang ZhangAbstract:The present study aimed to investigate the effect of different concentrations (0%, 2.5%, 5.0%, 7.5% and 10.0%) of medical stone (MS) on the lignocellulose degradation and organic matter humification during pig manure (PM) Composting. The results indicated that the addition of MS drastically promoted the organic carbon and lignin degradation. Compared to the control, the decomposition rate of hemicellulose and cellulose was increased by 9.64-27.08% and 2.11-12.07% in MS added treatments. Meanwhile, MS amendment significantly improved the humification of Composting process, and the humic acid contents in MS added treatments were 5.58-9.75% higher than control. The FTIR and synchronous fluorescence spectra indicated that the aromatization of final Compost was promoted with increasing the MS amount. In addition, the application of MS blended Composts could significantly improve the biomass and chlorophyll content of pachoi (Brassica chinensis L.). Due to the effective performance of MS, the 10.0% MS was suggested for PM Composting.
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evaluation of biochar amended biosolids co Composting to improve the nutrient transformation and its correlation as a function for the production of nutrient rich Compost
Bioresource Technology, 2017Co-Authors: Mukesh Kumar Awasthi, Quan Wang, Xiuna Ren, Junchao Zhao, Meijing Wang, Hongyu Chen, Sanjeev Kumar Awasthi, Di Guo, Xining Sun, Zengqiang ZhangAbstract:The influence of biochar amended dewatered fresh sewage sludge (DFSS)-wheat straw co-Composting on nutrients transformation and end products Quality was investigated. This is the first study to examine the biochar applied Compost Quality with different kgha-1 TKN on Brassica rapa L. growth. Seven mixtures were Composted over 8-weeks period in 130-L reactor using the same DFSS with different concentration of biochar (2%, 4%, 6%, 8%, 12% and 18% on dry weight basis) and without additive added treatment served as control. The results indicated that Compost with 8-12% biochar became more humified within 35days of Composting, and the Compost maturity parameters also showed that this could be much more feasible approach to increased water-soluble nutrients including NO3, DOC, DON, PO43-, K+ and Na+, but bioavailability of Cu, Zn, Ni and Pb content reduced as compared to control. Finally, results showed that 8-12% biochar was recommended for DFSS Composting and 150kgha-1 TKN of Compost dosages for organic farming.