Nutrient Recovery from Digestate of Anaerobic Digestion of Livestock Manure: a Review

Shi, Lijian; Simplicio, Walquiria Silva; Wu, Guangxue; Hu, Zhenhu; Hu, Hong-Ying; Zhan, Xinmin

doi:10.1007/s40726-018-0082-z

Cited by 123 publications

(61 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Alternatively, digestates are considered for obtaining biochemicals such as chitin [209] or fiber [210]. Depending on utilization pathway, regional conditions and economic feasibility, digestate treatment by ammonia stripping, chemical precipitation, mechanical, electro-chemical or membrane solid-liquid-separation, drying, pyrolysis or hydrothermal carbonization can be appropriate to recover nutrients, remove particles and reduce transport expenses [211].…”

Section: Coupling Anaerobic Digestion With Other Production Systems Omentioning

confidence: 99%

The Future Agricultural Biogas Plant in Germany: A Vision

et al. 2019

View full text Add to dashboard Cite

After nearly two decades of subsidized and energy crop-oriented development, agricultural biogas production in Germany is standing at a crossroads. Fundamental challenges need to be met. In this article we sketch a vision of a future agricultural biogas plant that is an integral part of the circular bioeconomy and works mainly on the base of residues. It is flexible with regard to feedstocks, digester operation, microbial communities and biogas output. It is modular in design and its operation is knowledge-based, information-driven and largely automated. It will be competitive with fossil energies and other renewable energies, profitable for farmers and plant operators and favorable for the national economy. In this paper we discuss the required contribution of research to achieve these aims.

show abstract

Section: Coupling Anaerobic Digestion With Other Production Systems Omentioning

confidence: 99%

The Future Agricultural Biogas Plant in Germany: A Vision

et al. 2019

View full text Add to dashboard Cite

show abstract

“…This can however, also lead to chemical precipitation in pipes, the resulting crystals cause fouling and blockages. Ensuring a certain level of purity of the crystals is difficult because of interfering ions and suspended particles in the process waster [74] . An investment in implementation of this technology is not always economically reasonable, because the costs arising cannot always be covered by the income from recycled phosphate fertilizers, since the phosphate recovery ratio from the aqueous phase is limited.…”

Section: Superiorities and Drawbacksmentioning

confidence: 99%

The current phosphate recycling situation in China and Germany: a comparative review

Xue¹,

He²,

Sachs³

et al. 2019

Front. Agr. Sci. Eng.

View full text Add to dashboard Cite

Phosphorus (P) is an indispensable element for organisms but the primary source of P-mineral phosphate resources-are non-renewable. Agricultural production has a high demand for fossil phosphate resources, but the resulting phosphate-rich residues are lack of management. This leads to rapid reserves depletion and severe phosphate pollution risks. One sustainable way is to reuse the phosphate dispersed in various residues such as sewage sludge and livestock manure. Diverse techniques have emerged to recover phosphate from wastes to close the phosphate cycle. While it is a global issue, the regional situations regarding potential phosphate scarcity and its management differ strongly. China is rich in phosphate resources, but over-exploitation has greatly increased the risk of phosphate rocks depletion, while in Germany the P resources depend on imports, but there is commitment to keep a balance between import and utilization. This had led to great differences in the way the two countries deal with the "re-use" of phosphate in waste. China is now in a transition phase from the simple terminal pollution control to "waste" reuse and nutrient resources recycling. One sign of this tendency is the mandatory garbage classification and preparation for further processing and recycling. This was first implemented in Shanghai in 2019, whereas Germany has been following the legal framework for waste management since the 19th century. There are a series of laws to control the nutrient loss from municipal and agricultural activities, as for instance with sewage sludge ordinance and fertilizer legislation. Many of these laws have been newly revised recently. Sewage sludge cannot be directly utilized on farmland as organic fertilizer any more. Alternatively, phosphate and other nutrients should be recovered from sewage sludge. Advanced phosphate recovery technologies and related nutrient recycling schemes are proceeding. This review summarizes the current situation of phosphate-containing residues management and phosphate reuse in China and Germany. The state legislation and policies, which would affect the phosphate recycling concept are presented as well. As there are various kinds of phosphate-containing residues, different phosphate recovery technologies can be applied. Those technologies are discussed from their mechanism and suitability.

show abstract

“…Thus, innovative solutions, such as membrane based technologies, are needed to improve the economic feasibility of struvite precipitation process ( Table 2). Membrane based technologies, in particular forward osmosis and electrodialysis, have the potential to simultaneously produce high quality effluent and pre-concentrated wastewater to facilitate nutrient recovery 7,101 . For example, Xie et al 20,102 developed a novel forward osmosis -membrane distillation hybrid system for extracting phosphorus from sludge centrate in the form of struvite.…”

Section: Nutrient Managementmentioning

confidence: 99%