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Hong J Di - One of the best experts on this subject based on the ideXlab platform.
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a new method to treat farm dairy effluent to produce Clarified Water for recycling and to reduce environmental risks from the land application of effluent
Journal of Soils and Sediments, 2019Co-Authors: K C Cameron, Hong J DiAbstract:There is increasing public concern about the amount of fresh Water used on New Zealand dairy farms and the adverse impacts that farm dairy effluent (FDE) has on the environment. FDE mainly consists of fresh Water (99%) with a small amount of solid material (1%). There is an opportunity to treat FDE to remove the colloidal solid material and recycle the Water to wash the farm yard. A new method of treating FDE has been developed. The method uses a coagulant to flocculate and settle the colloidal particles in the FDE and thus produce the Clarified Water for recycling. The research and development programme involved three stages: (i) standard laboratory jar tests to establish the amount of coagulant required to treat the FDE, (ii) large tank tests to confirm the effectiveness of the coagulant at a larger scale and (iii) construction and testing of two pilot plants. A pasture field trial was conducted to test the effect of the Clarified Water and treated effluent on plant production. The new method of treating FDE was highly successful in removing the colloidal material and producing Clarified Water that can be recycled to wash the farm yard. The average turbidity of the Clarified Water from the first pilot plant was 52 nephelometric turbidity units (NTU) (a 97% reduction in NTU compared to the original FDE) and the average Escherichia coli concentration was 9 cfu per 100 mL (a 99.99% reduction compared to the original untreated FDE). The average total-phosphorus (P) concentration of the Clarified Water was 1.8 g m−3 (94% reduction), dissolved reactive phosphorus (DRP) was 70% (from 200 to 61 g m−3). The average turbidity of the Clarified Water from the second pilot plant was < 20 NTU (a 99.5% reduction). There was no adverse impact from the land application of the Clarified Water or the treated FDE on plant growth. A new method for treating farm dairy effluent was successfully developed that produced Clarified Water that could be recycled to wash the farm yard and had a lower potential risk of environmental impacts when applied to land than untreated FDE. Land application of the Clarified Water or the treated FDE had no adverse impact on plant growth.
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A new method to treat farm dairy effluent to produce Clarified Water for recycling and to reduce environmental risks from the land application of effluent
Journal of Soils and Sediments, 2019Co-Authors: K C Cameron, Hong J DiAbstract:Purpose There is increasing public concern about the amount of fresh Water used on New Zealand dairy farms and the adverse impacts that farm dairy effluent (FDE) has on the environment. FDE mainly consists of fresh Water (99%) with a small amount of solid material (1%). There is an opportunity to treat FDE to remove the colloidal solid material and recycle the Water to wash the farm yard. Materials and methods A new method of treating FDE has been developed. The method uses a coagulant to flocculate and settle the colloidal particles in the FDE and thus produce the Clarified Water for recycling. The research and development programme involved three stages: (i) standard laboratory jar tests to establish the amount of coagulant required to treat the FDE, (ii) large tank tests to confirm the effectiveness of the coagulant at a larger scale and (iii) construction and testing of two pilot plants. A pasture field trial was conducted to test the effect of the Clarified Water and treated effluent on plant production. Results and discussion The new method of treating FDE was highly successful in removing the colloidal material and producing Clarified Water that can be recycled to wash the farm yard. The average turbidity of the Clarified Water from the first pilot plant was 52 nephelometric turbidity units (NTU) (a 97% reduction in NTU compared to the original FDE) and the average Escherichia coli concentration was 9 cfu per 100 mL (a 99.99% reduction compared to the original untreated FDE). The average total-phosphorus (P) concentration of the Clarified Water was 1.8 g m^−3 (94% reduction), dissolved reactive phosphorus (DRP) was 70% (from 200 to 61 g m^−3). The average turbidity of the Clarified Water from the second pilot plant was
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A new method to treat farm dairy effluent to produce Clarified Water for recycling and to reduce environmental risks from the land application of effluent
Journal of Soils and Sediments, 2019Co-Authors: K C Cameron, Hong J DiAbstract:There is increasing public concern about the amount of fresh Water used on New Zealand dairy farms and the adverse impacts that farm dairy effluent (FDE) has on the environment. FDE mainly consists of fresh Water (99%) with a small amount of solid material (1%). There is an opportunity to treat FDE to remove the colloidal solid material and recycle the Water to wash the farm yard. A new method of treating FDE has been developed. The method uses a coagulant to flocculate and settle the colloidal particles in the FDE and thus produce the Clarified Water for recycling. The research and development programme involved three stages: (i) standard laboratory jar tests to establish the amount of coagulant required to treat the FDE, (ii) large tank tests to confirm the effectiveness of the coagulant at a larger scale and (iii) construction and testing of two pilot plants. A pasture field trial was conducted to test the effect of the Clarified Water and treated effluent on plant production. The new method of treating FDE was highly successful in removing the colloidal material and producing Clarified Water that can be recycled to wash the farm yard. The average turbidity of the Clarified Water from the first pilot plant was 52 nephelometric turbidity units (NTU) (a 97% reduction in NTU compared to the original FDE) and the average Escherichia coli concentration was 9 cfu per 100 mL (a 99.99% reduction compared to the original untreated FDE). The average total-phosphorus (P) concentration of the Clarified Water was 1.8 g m−3 (94% reduction), dissolved reactive phosphorus (DRP) was 70% (from 200 to 61 g m−3). The average turbidity of the Clarified Water from the second pilot plant was
K C Cameron - One of the best experts on this subject based on the ideXlab platform.
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a new method to treat farm dairy effluent to produce Clarified Water for recycling and to reduce environmental risks from the land application of effluent
Journal of Soils and Sediments, 2019Co-Authors: K C Cameron, Hong J DiAbstract:There is increasing public concern about the amount of fresh Water used on New Zealand dairy farms and the adverse impacts that farm dairy effluent (FDE) has on the environment. FDE mainly consists of fresh Water (99%) with a small amount of solid material (1%). There is an opportunity to treat FDE to remove the colloidal solid material and recycle the Water to wash the farm yard. A new method of treating FDE has been developed. The method uses a coagulant to flocculate and settle the colloidal particles in the FDE and thus produce the Clarified Water for recycling. The research and development programme involved three stages: (i) standard laboratory jar tests to establish the amount of coagulant required to treat the FDE, (ii) large tank tests to confirm the effectiveness of the coagulant at a larger scale and (iii) construction and testing of two pilot plants. A pasture field trial was conducted to test the effect of the Clarified Water and treated effluent on plant production. The new method of treating FDE was highly successful in removing the colloidal material and producing Clarified Water that can be recycled to wash the farm yard. The average turbidity of the Clarified Water from the first pilot plant was 52 nephelometric turbidity units (NTU) (a 97% reduction in NTU compared to the original FDE) and the average Escherichia coli concentration was 9 cfu per 100 mL (a 99.99% reduction compared to the original untreated FDE). The average total-phosphorus (P) concentration of the Clarified Water was 1.8 g m−3 (94% reduction), dissolved reactive phosphorus (DRP) was 70% (from 200 to 61 g m−3). The average turbidity of the Clarified Water from the second pilot plant was < 20 NTU (a 99.5% reduction). There was no adverse impact from the land application of the Clarified Water or the treated FDE on plant growth. A new method for treating farm dairy effluent was successfully developed that produced Clarified Water that could be recycled to wash the farm yard and had a lower potential risk of environmental impacts when applied to land than untreated FDE. Land application of the Clarified Water or the treated FDE had no adverse impact on plant growth.
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A new method to treat farm dairy effluent to produce Clarified Water for recycling and to reduce environmental risks from the land application of effluent
Journal of Soils and Sediments, 2019Co-Authors: K C Cameron, Hong J DiAbstract:Purpose There is increasing public concern about the amount of fresh Water used on New Zealand dairy farms and the adverse impacts that farm dairy effluent (FDE) has on the environment. FDE mainly consists of fresh Water (99%) with a small amount of solid material (1%). There is an opportunity to treat FDE to remove the colloidal solid material and recycle the Water to wash the farm yard. Materials and methods A new method of treating FDE has been developed. The method uses a coagulant to flocculate and settle the colloidal particles in the FDE and thus produce the Clarified Water for recycling. The research and development programme involved three stages: (i) standard laboratory jar tests to establish the amount of coagulant required to treat the FDE, (ii) large tank tests to confirm the effectiveness of the coagulant at a larger scale and (iii) construction and testing of two pilot plants. A pasture field trial was conducted to test the effect of the Clarified Water and treated effluent on plant production. Results and discussion The new method of treating FDE was highly successful in removing the colloidal material and producing Clarified Water that can be recycled to wash the farm yard. The average turbidity of the Clarified Water from the first pilot plant was 52 nephelometric turbidity units (NTU) (a 97% reduction in NTU compared to the original FDE) and the average Escherichia coli concentration was 9 cfu per 100 mL (a 99.99% reduction compared to the original untreated FDE). The average total-phosphorus (P) concentration of the Clarified Water was 1.8 g m^−3 (94% reduction), dissolved reactive phosphorus (DRP) was 70% (from 200 to 61 g m^−3). The average turbidity of the Clarified Water from the second pilot plant was
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Effect of treated farm dairy effluents, with or without animal urine, on nitrous oxide emissions, ammonia oxidisers and denitrifiers in the soil
Journal of Soils and Sediments, 2019Co-Authors: Siyu Chen, K C Cameron, Hong Jie Di, Andriy Podolyan, Ju-pei Shen, Ji-zheng HeAbstract:Purpose In New Zealand, the application of farm dairy effluent (FDE) on pasture soils is the third largest source of nitrous oxide (N2O) emissions from grazed grassland. Recently, new FDE treatment technologies have been developed to produce Clarified Water (CW) and treated effluent (TE) to recycle Water and reduce the volume of fresh Water used at the farm dairy. The aim of this study was to compare the effects of CW and TE with those of FDE on N2O emissions and the growth of ammonia-oxidising bacteria (AOB), ammonia-oxidising archaea (AOA) and denitrifiers, when the effluents were applied to a grazed pasture soil.
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A new method to treat farm dairy effluent to produce Clarified Water for recycling and to reduce environmental risks from the land application of effluent
Journal of Soils and Sediments, 2019Co-Authors: K C Cameron, Hong J DiAbstract:There is increasing public concern about the amount of fresh Water used on New Zealand dairy farms and the adverse impacts that farm dairy effluent (FDE) has on the environment. FDE mainly consists of fresh Water (99%) with a small amount of solid material (1%). There is an opportunity to treat FDE to remove the colloidal solid material and recycle the Water to wash the farm yard. A new method of treating FDE has been developed. The method uses a coagulant to flocculate and settle the colloidal particles in the FDE and thus produce the Clarified Water for recycling. The research and development programme involved three stages: (i) standard laboratory jar tests to establish the amount of coagulant required to treat the FDE, (ii) large tank tests to confirm the effectiveness of the coagulant at a larger scale and (iii) construction and testing of two pilot plants. A pasture field trial was conducted to test the effect of the Clarified Water and treated effluent on plant production. The new method of treating FDE was highly successful in removing the colloidal material and producing Clarified Water that can be recycled to wash the farm yard. The average turbidity of the Clarified Water from the first pilot plant was 52 nephelometric turbidity units (NTU) (a 97% reduction in NTU compared to the original FDE) and the average Escherichia coli concentration was 9 cfu per 100 mL (a 99.99% reduction compared to the original untreated FDE). The average total-phosphorus (P) concentration of the Clarified Water was 1.8 g m−3 (94% reduction), dissolved reactive phosphorus (DRP) was 70% (from 200 to 61 g m−3). The average turbidity of the Clarified Water from the second pilot plant was
Yu. V. Chudova - One of the best experts on this subject based on the ideXlab platform.
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Choice of Filter Material for a Mechanical Filter for Purification of Water after Liming
Thermal Engineering, 2020Co-Authors: A. A. Panteleev, S. V. Aladushkin, A. S. Kasatochkin, M. M. Shilov, Yu. V. ChudovaAbstract:The possibility of using quartz sand as a filter material for mechanical filters in the schemes of preliminary Water treatment in Water treatment plants with coagulation and liming at thermal power plants is considered. Comparative experiments on filtering Water through quartz sand at the laboratory bench of an operating thermal power plant showed the absence of leaching of silicic acid from sand at pH = 10.0–10.2 and a filtration rate of 7 m/h. The turbidity of the filtrate is close to zero, and the quality of the Water obtained after filtering through quartz sand is higher than when filtering through hydroanthracite. Hydroanthracite is characterized by relatively high abrasion and increased cost in comparison with quartz sand. Model experiments were carried out in a wide pH range when filtering Water through sand, which showed the absence of a significant release of silicic acid into Water. We studied the long-term interaction of Water with quartz sand at pH 12, in which there is no intensive release of silicic acid compounds into Water. Studies of the quality of the filtrate of mechanical filters loaded with quartz sand and hydroanthracite at a high pH of the treated Water were performed. To prevent silicic acid compounds from entering Clarified Water, it is recommended that the first portion of the filtrate of the mechanical filters be discharged before being put into operation after a long period of inactivity. Recommendations on the use of quartz sand as a filter material in mechanical filters of the preliminary Water treatment scheme at thermal power plants are presented.
S.k. Kawatra - One of the best experts on this subject based on the ideXlab platform.
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Design of a continuous pilot-scale deslime thickener
Minerals & Metallurgical Processing, 2017Co-Authors: H.j. Haselhuhn, S.k. KawatraAbstract:Thickening is used during two primary mineral processing operations: Water removal and desliming. During Water removal, the pulp density is increased through the injection of flocculants. These flocs settle and create a dense pulp while Clarified Water is removed through the overflow. During desliming, fine particles are removed through the overflow. Desliming can also be used as a mineral separation process known as selective flocculation-dispersion, where valuable minerals are flocculated and gangue minerals remain dispersed and exit through the overflow.
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Design of a continuous pilot-scale deslime thickener
Minerals & Metallurgical Processing, 2017Co-Authors: H.j. Haselhuhn, S.k. KawatraAbstract:Thickening is used during two primary mineral processing operations: Water removal and desliming. During Water removal, the pulp density is increased through the injection of flocculants. These flocs settle and create a dense pulp while Clarified Water is removed through the overflow. During desliming, fine particles are removed through the overflow. Desliming can also be used as a mineral separation process known as selective flocculation-dispersion, where valuable minerals are flocculated and gangue minerals remain dispersed and exit through the overflow. There are many ways to analyze thickener performance on a laboratory scale, but these analyses often do not correlate well with full-scale performance. Some pilot-scale systems have been designed using a semicontinuous approach, but the amount of material required to perform their tests can make semicontinuous pilot thickeners impractical for most applications. This paper focuses on the design and optimization of a continuous pilot-scale deslime thickener that requires minimal material to operate. The design, optimization strategy, and an example study of reagent selection are demonstrated.
A. A. Panteleev - One of the best experts on this subject based on the ideXlab platform.
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Choice of Filter Material for a Mechanical Filter for Purification of Water after Liming
Thermal Engineering, 2020Co-Authors: A. A. Panteleev, S. V. Aladushkin, A. S. Kasatochkin, M. M. Shilov, Yu. V. ChudovaAbstract:The possibility of using quartz sand as a filter material for mechanical filters in the schemes of preliminary Water treatment in Water treatment plants with coagulation and liming at thermal power plants is considered. Comparative experiments on filtering Water through quartz sand at the laboratory bench of an operating thermal power plant showed the absence of leaching of silicic acid from sand at pH = 10.0–10.2 and a filtration rate of 7 m/h. The turbidity of the filtrate is close to zero, and the quality of the Water obtained after filtering through quartz sand is higher than when filtering through hydroanthracite. Hydroanthracite is characterized by relatively high abrasion and increased cost in comparison with quartz sand. Model experiments were carried out in a wide pH range when filtering Water through sand, which showed the absence of a significant release of silicic acid into Water. We studied the long-term interaction of Water with quartz sand at pH 12, in which there is no intensive release of silicic acid compounds into Water. Studies of the quality of the filtrate of mechanical filters loaded with quartz sand and hydroanthracite at a high pH of the treated Water were performed. To prevent silicic acid compounds from entering Clarified Water, it is recommended that the first portion of the filtrate of the mechanical filters be discharged before being put into operation after a long period of inactivity. Recommendations on the use of quartz sand as a filter material in mechanical filters of the preliminary Water treatment scheme at thermal power plants are presented.