Phosphorus Fixation in the Sludge Treatment System of a Biological Phosphorus Removal Process

Fujimoto, Naoshi; Mizuochi, T.; Togami, Y.

doi:10.2166/wst.1991.0513

Cited by 48 publications

(17 citation statements)

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“…The precipitation of struvite was reported to be an effective method for the recovery of nitrogen and phosphorus in several anaerobically digested wastewaters such as swine and calf wastewater, coke manufacturing, landfill leachate, leather tanning, dairy manure, etc. (Fujimoto et al, 1991;Battistoni et al, 1997Battistoni et al, , 2000Li et al, 1999;Schuiling and Andrade, 1999;Munch and Barr, 2001;Nelson et al, 2003;Uludag-Demirer et al, 2005). However, there is only one study reported in which struvite precipitation was carried out during the AD of a food waste in a digester (Lee et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Anaerobic digestion of dairy manure with enhanced ammonia removal

Uludağ-Demirer

Demirer

Frear

et al. 2008

Journal of Environmental Management

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Section: Introductionmentioning

confidence: 99%

Anaerobic digestion of dairy manure with enhanced ammonia removal

Uludağ-Demirer

Demirer

Frear

et al. 2008

Journal of Environmental Management

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“…As for the required alkaline condition of an elevated pH in the MAP system, it can be achieved by alkaline addition or pre-aeration (Battistoni et al, 1998). A study performed by Fujimoto et al (1991) has demonstrated that addition of NaOH is more effective than addition of lime or Mg(OH) 2 .…”

Section: Introductionmentioning

confidence: 99%

Recovery of ammonium-nitrogen from landfill leachate as a multi-nutrient fertilizer

Zhao

2003

Ecological Engineering

168

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This is the Pre-Published Version. 2 chard (Brassica rapa var. chinensis), water spinach (Ipomoea aquatica) and water convolvulus (Ipomea aquatica, I. reptans), were planted in completely decomposed granite soil and the MAP precipitate was applied as a fertilizer. The germination and growth of the selected vegetables in the pots with MAP showed significantly greater rates than those in the pots without MAP as control tests. The experiment also demonstrated that over-dosing about 2-8 times of MAP in the soil did not cause any problems with water spinach (Ipomoea aquatica) growth, due to its limited solubility in water. MAP application as a fertilizer did not result in more heavy metals in the vegetables than those from soil and model fertilizer, whereas the higher levels of P and Mg in the vegetables would stimulate vegetables' growth.This study confirmed the feasibility of recovering NH 4 + -N from landfill leachate effectively by chemical precipitation, and also the feasibility of applying the MAP precipitate as a multinutrient fertilizer for vegetable growth.

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“…Chemically bound P in soil could become available to plant under certain biogeochemical conditions, serving as a natural reservoir of "slow-release" P 13 . However, the slow release characteristics of soil bound P are affected by many uncontrollable factors, such as temperature, humidity, organic acid secreted by crop roots, soil pH, and soil mineral composition [14][15][16][17] . Thus, P released under these conditions cannot fulfill the crop P demand, especially during the critical growth period.…”

mentioning

confidence: 99%

Water Polishing improved controlled-release characteristics and fertilizer efficiency of castor oil-based polyurethane coated diammonium phosphate

Lu¹,

Tian²,

Zhang³

et al. 2020

Sci Rep

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The production cost of controlled-release fertilizers is an important factoring limiting their applications. To reduce the coating cost of diammonium phosphate (DAP) and improve its nutrition release characteristics, the fertilizer cores were modified by water polishing with three dosages at 1, 2, and 3%. The effects of modification were evaluated in terms of particle hardness, size distribution, angle of repose and specific surface area. Castor oil-based polyurethane was used as coating material for fertilizer performance evaluation. A pot experiment was conducted to verify the fertilizer efficiency of coated diammonium phosphate (CDAP) with maize. The results showed that polishing with 2% water reduced the angle of repose by 2.48-10.57% and specific surface area by 5.70-48.76%, making it more suitable for coating. The nutrient release period of CDAP was significantly prolonged by 5.36 times. Soil available phosphorous, enzyme activities, maize grain yield, and phosphorous use efficiency were all improved through the blending application of coated and normal phosphate fertilizer. This study demonstrated that water-based surface modification is a low-cost and effective method for improvement and promotion of controlled release P fertilizers. Phosphorus (P) is an essential nutrient for maintaining healthy crop growth, reproduction and yield 1-3 . However, farmers tend to apply excessive amount of P fertilizers in order to obtain high yields 4 , resulting in degradation of microbial community activity and soil tilth 5 , decrease in crop quality 6 , and varying forms of water pollution 7 . Meanwhile, P fertilizers are mainly derived from P rock, a non-renewable resource. With the increasing use of P fertilizer, the global P reserve is facing serious concerns 8 . Innovative technologies for improving the utilization efficiency and reducing the production cost of P fertilizers are urgently needed.Controlled-release fertilizers have been proved to improve the utilization efficiency of both nitrogen (N) and P fertilizer 9,10 . While much research has been conducted on controlled-release N fertilizers 11,12 , relatively much less work has focused on controlled-release P fertilizers. Chemically bound P in soil could become available to plant under certain biogeochemical conditions, serving as a natural reservoir of "slow-release" P 13 . However, the slow release characteristics of soil bound P are affected by many uncontrollable factors, such as temperature, humidity, organic acid secreted by crop roots, soil pH, and soil mineral composition [14][15][16][17] . Thus, P released under these conditions cannot fulfill the crop P demand, especially during the critical growth period. Recent research indicated that the fixed rate of soil P was closely related to the concentration of P in soil solution 18 . Coated P fertilizers have advantages over conventional P fertilizers in that the polymer coating prevents direct contact between soil and fertilizer, thus the controlled release of P promotes uptake by plants and reduces P fix...

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Phosphorus Fixation in the Sludge Treatment System of a Biological Phosphorus Removal Process

Cited by 48 publications

References 0 publications

Anaerobic digestion of dairy manure with enhanced ammonia removal

Anaerobic digestion of dairy manure with enhanced ammonia removal

Recovery of ammonium-nitrogen from landfill leachate as a multi-nutrient fertilizer

Water Polishing improved controlled-release characteristics and fertilizer efficiency of castor oil-based polyurethane coated diammonium phosphate

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