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 …
According to Yuan et al. (2018), phosphogypsum and dicyandiamide can reduce methane (CH 4) and N 2 O emissions by 75.6% and 86.4%, respectively; however, the NH 3 emission can increase by 22.0%. Jiang …
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 treatment without additives. Results show that phosphorous additives could effectively conserve nitrogen.
"Effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting," Bioresource Technology 270, 368-376. DOI: 10.1016/j.biortech.2018.09.023
The finding implicates that CaSSP application could be a potential strategy for N2O mitigation in manure windrow composting, and the revealed microbial mechanism …
In addition to control treatment (CK) without additive addition, other three treatments were performed to be added 10% of phosphogypsum as well as 2.5% and 10% of superphosphate based on dry mass (DM), which were named as PPG, SSP-L, and SSP-H, respectively. 10% phosphogypsum and 2.5% superphosphate had identical …
Gaseous emissions could potentially be avoided using additives such as phosphogypsum or superphosphate, but this approach has negative implications in terms of economic viability and process ...
Single superphosphate (SSP), also called normal or ordinary superphosphate, has been the principal phosphate fertiliser for more than a century and supplied over 60% of the world's phosphate in the mid 20th century. Since then its relative importance has declined steadily. The decline in actual tonnage has been small, but …
acid, 4–5 tons of phosphogypsum are produced (El Issiouy et al. 2013; Papastefanou et al. 2006). Currently, between 3 and 4 billion tons of phosphogypsum have been produced, with an annual rise of 300 million tons (Cuadri et al. 2021). The question of considering phosphogypsum as a waste or a resource has been
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 …
Phosphogypsum, a waste by-product from wet-acid production of phosphoric acid, contains variable levels of metal impurities (Cd, Zn, barium (Ba)) and radionuclides (mainly …
This study investigated the effects of phosphogypsum and superphosphate on the maturity and gaseous emissions of composting kitchen waste. Two amended compost …
The U.S. Department of Energy's Office of Scientific and Technical Information
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 ...
DOI: 10.1016/j.wasman.2014.11.012 Corpus ID: 9399950; Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste composting. @article{Yang2015EffectsOP, title={Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste …
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 ) emissions but increased nitrous oxide (N 2 O) emission. …
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 …
Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product of the phosphate fertilizer industry. It is produced in huge quantities (300 MT/year), but only 15% of the PG produced is recycled. ... (2015) Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste …
Phosphogypsum contains substantial quantities of P, which can be beneficial if large amounts of gypsum are applied. The levels of the other elements in the materials are so low that they are of little importance. Phosphogypsum from Florida contains 226 Ra and gives off radon (222 Rn) gas, which poses a potential health hazard (Mays and Mortvedt ...
However, the effect of phosphogypsum on phosphate fertilization efficiency is still unclear. A long-term field experiment was performed on an Oxisol in Parana State, Brazil to evaluate the effects of triple superphosphate (TSP) and phosphogypsum application rates on nutrition and grain yield of soybean, wheat, and black oat under no-till.
This study investigated the effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting. Results showed that phosphogypsum ...
Phosphogypsum is a solid waste byproduct from processing phosphate ore to make phosphoric acid that is later used in fertilizer. Phosphogypsum contains radium, which decays to form radon gas. Both radium and radon are radioactive and can cause cancer. The Clean Air Act regulations require that phosphogypsum be managed in …
This study investigated the effects of phosphogypsum, superphosphate, and dicyandiamide on gaseous emission and compost quality during sewage sludge composting. Results showed that phosphogypsum ...
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 …
It has been demonstrated that introducing chemical additives, e.g. dicyandiamide (DCD), phosphogypsum (PPG) and superphosphate (SSP) is an effective …
DOI: 10.1016/j.jenvman.2020.111560 Corpus ID: 226305349; Microbial succession and molecular ecological networks response to the addition of superphosphate and phosphogypsum during swine manure composting.
Superphosphate and phosphogypsum affected microbial community succession. • Superphosphate and phosphogypsum changed bacterial and fungal network structures. • pH was the main factor that affected bacterial and fungal communities. • Phosphogypsum had a greater effect on microorganisms than superphosphate.
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 CH4 emissions (by 85.8% and 80.5%, respectively) and decreased NH3 emissions (by 23.5% and 18.9%, …
Phosphogypsum (PG) is the primary byproduct generated during the production of phosphoric acid, an intermediate product in phosphate fertilizer production, from calcium phosphate (apatite) ore. PG also exists in very small amounts in nature where it is the result of natural guano processes as they took for instance place in the …
Phosphogypsum is the most significant industrial solid waste in the world. Phosphogypsum has a complex composition and its traditional storage methods occupy large areas of land and also damage the environment. Currently, phosphogypsum is mainly used for the direct preparation of construction materials and chemical auxiliary …
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 …
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.
Combination of superphosphate and dicyandiamide reduced NH 3, CH 4 and N 2 O emissions by 12.3%, 81.0% and 88.2%, respectively. More importantly, with the addition of 10% initial raw materials, phosphogypsum and superphosphate conserved nitrogen and improved compost quality by introducing additional nutrients.