Phosphorus Removal and Recovery from Digestate after Biogas Production

Lin, Hongjian; Gan, Jian; Rajendran, A.; Reis, Cristiano E. Rodrigues; Hu, Bo

doi:10.5772/60474

Cited by 26 publications

(14 citation statements)

References 142 publications

(189 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Digestion also leads to a significant raise of pH from the Cattle slurry to the related digestate DG Cattle on all dates. It is known that a raise in pH promotes the formation of dissociated phosphate ions, which then precipitate as insoluble Ca and Mg phosphates [5,13]. e same mechanism is used to recover phosphorus and nitrogen from wastewater and liquid digestates via enforced struvite (MgNH 4 PO 4 * 6H 2 O) formation [41][42][43].…”

Section: Resultsmentioning

confidence: 99%

“…is problem is not solved by anaerobic digestion in biogas plants: P may be lost during digestion due to leaching or retention via crystal deposition lignin, the reactor [11,12], but on the other hand, P concentrations rise as carbon is lost from the substrate via methane production. Overall losses are reported to be somewhere between 10 and 36%, but are usually on the lower end of this range [5,11,13]. Digestates therefore contain, in most cases, almost as much P as the original substrate.…”

Section: Introductionmentioning

confidence: 99%

“…In swine manure, for example, the N : P ratio ranges from 1 : 1 to 2 : 1, while the required N : P ratio of most crops is between 3 : 1 and 15 : 1. If these fertilizers are applied in an amount that satisfies the nitrogen demand of the crop, P is usually applied in excess [5,6]. e majority of this phosphorus is rapidly adsorbed and then absorbed by soil particles [7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Monitoring N : P Ratio and Cd, Cu, Pb, and Zn Contents in Different Types of Anaerobic Digestates: A Six-Year Study Case

Roß

Nielsen

Krieger

et al. 2020

International Journal of Agronomy

View full text Add to dashboard Cite

Depending on the quality of the input substrates, process parameters, and postfermentation treatments, digestates may contain a broad spectrum of potentially toxic elements. We suspected that these contents may vary on a broad scale even under seemingly stable process conditions at the biogas plant. Digestates from four biogas plants were therefore continuously analyzed for their contents of phosphorus, nitrogen, cadmium, copper, lead, and zinc over a period of six years. The input substrates varied between the plants (e.g., cattle and pig slurry and rye and maize silage), but were the same for each plant over the whole period. The N : P ratio of the digestates ranged from 2 to 24, with the digestate coming from cofermentation of pig slurry and energy crops (“DG Pig”) having the widest range of N : P ratio over the years. Heavy metal loads of all digestates and during all evaluations did not exceed the limits set by European or German legislation, but as previously expected, showed a large variability especially if cattle or pig manure were used as substrates. Copper content of Cattle slurry before digestion was 897.7 mg kg−1 DM in one case, and zinc content of DG Pig reached 590.2 mg kg−1 DM also once during the investigation. As a result, we strongly recommend to monitor especially phosphorus, copper, and zinc contents in digestates very closely and in short intervals.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Monitoring N : P Ratio and Cd, Cu, Pb, and Zn Contents in Different Types of Anaerobic Digestates: A Six-Year Study Case

Roß

Nielsen

Krieger

et al. 2020

International Journal of Agronomy

View full text Add to dashboard Cite

show abstract

“…Under aerobic conditions, degradation of PHAs leads to the generation of acetyl-CoA and propionyl-CoA, both of which enter TCA cycle as carbon and energy source for biomass growth, phosphate uptake and poly-P generation [29]. Thus, efficiency of aerobic metabolism of PAOs was evaluated based on phosphate uptake and PHA consumption rates during 6 h of continuous aeration.…”

Section: Effect Of 35-diclorophenol On Aerobic Metabolism Of Polyphomentioning

confidence: 99%

Assessment of enhanced biological phosphorus removal process inhibition

et al. 2020

View full text Add to dashboard Cite

Wastewater in industrial regions frequently contains substances which are potentially inhibitory to activated sludge treatment processes. Enhanced biological phosphorus removal (EBPR) is vulnerable to process inhibition mostly because of the location at the beginning of the treatment process and complex characteristics of influent. Much knowledge has been developed on the EBPR process; nonetheless, methods used for estimation of the process inhibition vary largely. There is no easily applicable and reliable method available for rapid determination of inhibition of the EBPR process. In this study, a method for evaluation of inhibition on the EBPR process was developed and controlled. In contrast with previous research, a fresh non-acclimated inoculum was used to enhance the possibility to predict the impact for wastewater treatment plant. The efficiency of the process was evaluated based on the values of orthophosphate release and uptake, synthesis and consumption of polyhydroxyalkanoates. 3,5-dichlorophenol (3,5-DCP) was used as a model inhibitory compound. It was found that the EBPR inhibition tests using a non-acclimated sludge need wastewater as the organic carbon source. Furthermore, the length of aerobic period substantially influenced the inhibition test resultsachieved maximum inhibitory concentration (IC 50) values were 2.4 times higher when aerobic phase was 6 h instead of 1.5 h. Consequently, extended aeration period was suggested to diminish the inhibition effect. Finally, the impact of the 3,5-DCP on different activated sludge treatment process using respective standard methods was tested and compared. It was found that EBPR process was similarly to the nitrification a sensitive activated sludge process.

show abstract

“…Compared with mineral P, organic inputs are beneficial to the conversion of moderately labile inorganic P to available P (Chen et al, 2021). Organic fertilizers contain a variety of P compounds, including a large proportion of orthophosphate (Lin et al, 2015;Liang et al, 2017). It also affect soil P dynamics by changing its P adsorption capacity (Gatiboni et al, 2019;Barnett, 1994).…”

Section: Introductionmentioning

confidence: 99%

The distribution of phosphorus from recycled fertilizers to different soil fractions determines the phosphorus availability in soil

Yuan

Zhang

Müller

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. Recycling of agricultural wastes to reduce mineral fertilizer input, in particular phosphorous (P), plays crucial role in sustainable agriculture production. Understanding the transformation of phosphorous (P) fractions and their bioavailability following soil application of different renewable P-contained fertilizers is very important for improving P use efficiency and reducing environmental risks. In this study, the effects of mineral P-fertilizer superphosphate and recycled P-fertilizers, i.e., poultry manure, cattle manure, maize straw and cattle bone meal, on their distribution to different soil P fractions, their transformation and the availability of soil P were determined by soil P sequential fractionation and 31P solution nuclear magnetic resonance (NMR). The results showed that addition of mineral P fertilizer, poultry manure and cattle manure increased P fixation in a red soil more than that in a fluvo-aquic soil. In both fluvo-aquic and red soils, cattle manure out-performed all other recycled P sources used in improving soil P availability. The concentration of Olsen-P in fluvo-aquic and red soils supplemented with cattle manure were increased by 41 %–380 % and 16 %–70 % than the other recycled P sources. A structural equation model (SEM) explained 95 % and 91 % of Olsen-P variation in fluvo-aquic and red soils, respectively. Labile P fractions had positive effects on Olsen-P of fluvo-aquic and red soils. 31P-NMR study showed that amount of orthophosphate was the main factor affecting the availability of P from different P sources. In summary, cattle manure was found to be a superior renewable source of P in improving bioavailable P in soil, and its use thus has considerable practical significance in P recycling.

show abstract

Phosphorus Removal and Recovery from Digestate after Biogas Production

Cited by 26 publications

References 142 publications

Monitoring N : P Ratio and Cd, Cu, Pb, and Zn Contents in Different Types of Anaerobic Digestates: A Six-Year Study Case

Monitoring N : P Ratio and Cd, Cu, Pb, and Zn Contents in Different Types of Anaerobic Digestates: A Six-Year Study Case

Assessment of enhanced biological phosphorus removal process inhibition

The distribution of phosphorus from recycled fertilizers to different soil fractions determines the phosphorus availability in soil

Contact Info

Product

Resources

About