(PDF) Phosphogypsum Processing Method
The comparison of the developed phosphogypsum processing method with well-known national and foreign analogues showed that its cost-efficiency is 2-3 times higher; the area necessary for the plant ...
Reducing ammonia and greenhouse gas emission with …
Previous studies revealed that superphosphate fertilizer (SSP) as an additive in compost can reduce the nitrogen loss and improve the effectiveness of phosphorus during composting. However, few studies have explored the influence of adding SSP with high levels on ammonia and greenhouse gas emission and the suitable amount for SSP addition …
EPA'S OPPORTUNITY TO REVERSE THE FERTILIZER …
ever-expanding phosphogypsum stacks near the fertilizer facilities that generated them. 29. A phosphogypsum stack . can be more than one square mile wide. 30. and 500 feet tall, 31. and store more than one billion gallons of process waste-water. 32. More than 30 million tons of phosphogypsum per . year are produced in Florida alone, 33. and an ...
Effects of phosphogypsum on enzyme activity and microbial …
Phosphogypsum (PG) is a solid waste produced by sulfuric acid decomposing phosphate rock to produce phosphoric acid. The main component is calcium sulfate and …
Phosphate Primer
These discoveries gave American industry the opportunity to take the lead in the mining of rock phosphates and the production of superphosphate – a lead which has been maintained ever since." In a message to the United States Congress in 1938, President Franklin D. Roosevelt underscored the importance of phosphate to agriculture and people.
Role of phosphorous additives on nitrogen conservation and …
Adding phosphogypsum could significantly reduce NH 3 emission and total nitrogen loss, but increase N 2 O emission. Application of 10% superphosphate mitigated NH 3 …
Effects of phosphorus-containing additives on carbon …
Phosphogypsum and superphosphate were applied with the same amount of phosphorus (5% of the initial total nitrogen, molar basis) or weight (10% of initial dry matter) and compared to a control ...
Single Superphosphate
Single superphosphate (SSP) was the first commercial mineral fertilizer, and it led to the development of the modern plant nutrient industry. ... (MCP, also called calcium dihydrogen phosphate) and gypsum, no problems arise with phosphogypsum byproduct disposal unlike the manufacture of other common P fertilizers. SSP is also known as ordinary ...
Effects of phosphogypsum, superphosphate, and …
This study investigated the effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting. Results showed that phosphogypsum reduced ammonia (NH 3) and methane (CH 4) …
Effect of superphosphate addition on heavy metals …
Many studies reported that different kinds of phosphate amendments, such as, superphosphate (SSP), calcium magnesium phosphate (facilitating struvite crystallization), phosphate rock, phosphogypsum, etc., could effectively reduce nitrogen loss, increase phosphorus content, and improve the quality of compost product derived from livestock and ...
Effects of dicyandiamide, phosphogypsum and superphosphate …
This study investigated the effects of dicyandiamide, phosphogypsum and superphosphate on greenhouse gas emissions and compost maturity during pig manure composting. The results indicated that the addition of dicyandiamide and phosphorus additives had no negative effect on organic matter degradation, and could improve the compost maturity. ...
Effects of Dicyandiamide, Phosphogypsum, and Superphosphate …
Phosphogypsum and superphosphate were applied with the same amount of phosphorus (5% of the initial total nitrogen, molar basis) or weight (10% of initial dry matter) and compared to a control ...
Effects of phosphogypsum and superphosphate on compost …
Highlights: • Effect of phosphogypsum and superphosphate on composting gas emissions was studied. • The reduction mechanisms of composting gas were clarified in this …
Effects of phosphogypsum and superphosphate on compost …
This study investigated the effects of phosphogypsum and superphosphate on the maturity and gaseous emissions of composting kitchen waste. Two amended compost …
Microbial succession and molecular ecological networks …
This study assessed the effects of superphosphate (SPP) and phosphogypsum (PPG) on the bacterial and fungal community succession and molecular ecological networks during composting. Adding SPP and PPG had positive effects on the bacterial richness and diversity, negative effects on the fungal richness and diversity.
Effects of external additives: Biochar, bentonite, phosphate, on …
Various forms of P can affect the composting process, such as low-grade rock, phosphate, phosphogypsum, superphosphate, etc. ... Phosphate (superphosphate: magnesium hydroxide in a molar ratio of 1.5:1) were added at 20% TN of the mixed composting materials based on CK treatment, which was denoted as "MP" treatment. Calcium bentonite …
Natural radioactivity in phosphate rock, phosphogypsum and phosphate
Phosphate deposits are generally characterized by enhanced radionuclide concentrations compared to natural levels. The mining and processing of this phosphate ore redistribute radionuclides throughout the environment and introduce them into phosphoric acid and phosphogypsum. Phosphoric acid is the starting material for triple superphosphate …
Effects of Dicyandiamide, Phosphogypsum, and Superphosphate …
Dicyandiamide combined with phosphogypsum or superphosphate could enhance mitigation of the total greenhouse gas (37.46% and 29.55%) and NH 3 emissions (18.28% and 21.48%). The combination of dicyandiamide and phosphogypsum exhibits the most pronounced emission reduction effect, simultaneously decreasing the NH 3, CH 4, and …
The natural radioactivity of the rock phosphates, phosphatic …
The radioactivity of the Minjingu phosphorite deposit in Arusha-Tanzania was determined by radiochemical and radiometric methods of analysis. The main radioisotopes analysed in the rock phosphate, phosphate concentrate (ground rock phosphate), phosphate fertilizers (superphosphate, and triple superphosphate) and phosphogypsum were 238 U, …
Effects of phosphogypsum on enzyme activity and microbial …
Lei, L. et al. Microbial succession and molecular ecological networks response to the addition of superphosphate and phosphogypsum during swine manure composting. J. Environ. Manage. 279, 111560 ...
Mitigating greenhouse gas emission and enhancing …
Furthermore, the combination of dicyandiamide with phosphogypsum or superphosphate has been found to enhance the mitigation of total greenhouse gas emissions by 29.5%–37.5% (F. Yang et al., 2022). Phosphorus slag (PS), the remaining by-product of phosphate ore extraction and processing, is underused as a resource ( Yong et al., 2022 ).
Effects of phosphogypsum, superphosphate, and …
DOI: 10.1016/j.biortech.2018.09.023 Corpus ID: 52879266; Effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting.
Phosphogypsum
Phosphogypsum is a waste by-product from the processing of phosphate rock in plants producing phosphoric acid and phosphate fertilizers, such as superphosphate. The wet chemical phosphoric acid treatment process, or 'wet process', in which phosphate ore is digested with sulfuric acid, is widely used to produce phosphoric acid and calcium ...
Radioactivity of Phosphate Ore, Superphosphate, and Phosphogypsum …
of 523, 473, and 134 Bq kg−1; 226Ra in concentrations of 514, 301, and 411 Bq kg−1; 232Th in concentrations of 37, 24, and 19 Bq kg−1; and 40K in concentrations of 19, 3, and 16 Bq kg−1 for the analyzed materials, respectively. The data are discussed and compared with those given in the literature for some other countries in light of permissible radiation dose rates. ©1994Health ...
Microbial succession and molecular ecological networks
This study assessed the effects of superphosphate (SPP) and phosphogypsum (PPG) on the bacterial and fungal community succession and molecular ecological networks during composting. Adding SPP and PPG had positive effects on the bacterial richness and diversity, negative effects on the fungal richne …
Effects of phosphate-containing additives and zeolite on …
Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste composting. Waste Manag., 36 (2015), pp. 70-76. View PDF View article View in Scopus Google Scholar. Yang et al., 2016. Z. Yang, A. Kappler, J. Jiang.
Effects of phosphogypsum and superphosphate on …
This study investigated the effects of phosphogypsum and superphosphate on the maturity and gaseous emissions of composting kitchen waste. Two amended compost treatments were conducted using phosphogypsum and superphosphate as additives with the addition of 10% of initial raw materials (dry weight). A control treatment was also studied. The treatments were …
Performance of phosphogypsum and calcium magnesium phosphate …
Phosphogypsum, the main byproduct from phosphoric acid production, has also widely been used to reduce gaseous emissions during composting. ... Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste composting. Waste Manage, 36 (2015), pp. 70-76. View PDF View article View …
Effects of phosphogypsum and superphosphate on …
Phosphogypsum and superphosphate had no negative effects on compost maturity, although superphosphate inhibited the temperature rise in the first few days. The addition of phosphogypsum and superphosphate drastically reduced CH{sub 4} emissions (by 85.8% and 80.5%, respectively) and decreased NH{sub 3} emissions (by 23.5% and 18.9% ...
David Chadwick's research works | Bangor University, Bangor …
David Chadwick's 4 research works with 335 citations and 280 reads, including: Effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage ...