Insight into the short- and long-term effects of inorganic phosphate on anammox granule property

Zhang, Zheng-Zhe; Xu, Jiajia; Hu, Haiyan; Shi, Zhi-Jian; Ji, Zheng-Quan; Deng, Rui; Shi, Man-Ling; Jin, Ren‐Cun

doi:10.1016/j.biortech.2016.02.097

Cited by 69 publications

(11 citation statements)

References 33 publications

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“…The sludge property was reflected by detecting extracellular polymeric substances (EPS), soluble microbial products (SMP), and dehydrogenase activity (DHA). EPS extraction was performed as previously reported (Zhang et al, 2016): 8‐ml sludge was added to a 10‐ml centrifuge tube, balanced, and centrifuged at 8,000 rpm for 15 min. The supernatant was regarded as SMP, phosphate buffer solution was added to the original volume, and the mixture was shaken and sonicated for 3 min.…”

Section: Methodsmentioning

confidence: 99%

Comparison of three anaerobic digestion reactors for low‐carbon wastewater treatment

Wei

Zhang

Zhao

et al. 2022

Water Environment Research

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In this study, three anaerobic digestion reactors using up‐flow anaerobic sludge blanket (UASB), anaerobic sequencing batch reactor (AnSBR), and anaerobic membrane bioreactor (AnMBR) were studied. The chemical oxygen demand (COD), gas production, sludge performance, and microbial characteristics of the anaerobic digestion process were assessed. The results showed that the average COD removal efficiencies reached 86%, 83%, and 85%, with corresponding removed rates of 2.49, 0.48, and 0.79 kg COD m−3 d−1 in UASB, AnSBR, and AnMBR, respectively. After the reactors attained stable operation, both extracellular polymeric substances and soluble microbial products decreased in all the reactors compared with the seed sludge. Methanothrix was the dominant archaea for methane production in the UASB, the relative abundance of which increased from 58.3% to 83.4%. These results identify UASB as the most suitable reactor for anaerobic digestion when treating wastewater with low carbon. Such reactors are important for the application and development of the energy self‐sufficiency in sewage treatment. Practitioner Points UASB, SBR, and MBR were adopted to treat low‐carbon wastewater using anaerobic digestion process. UASB performed the highest COD removal from low‐carbon wastewater. The main microorganisms in UASB were Methanothrix, Methanomassiliicoccus, and Methanobacterium.

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Section: Methodsmentioning

confidence: 99%

Comparison of three anaerobic digestion reactors for low‐carbon wastewater treatment

Wei

Zhang

Zhao

et al. 2022

Water Environment Research

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“…50 The XRD patterns in Figure 7 confirmed that HAP was the main crystal in the inorganic fractions of the granules; a similar result was also observed in a previous study. 51 However, XRD only detects crystalline structures, but the background noise suggests the presence of a small amount of other precipitates, which explains the higher Ca/P ratio.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Enhanced Simultaneous Nitrogen and Phosphorus Removal Performance by Anammox–HAP Symbiotic Granules in the Attached Film Expanded Bed Reactor

Zhang

Lin

et al. 2018

ACS Sustainable Chem. Eng.

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Dissolved nitrogen and phosphorus compounds are responsible for eutrophication and usually are treated by separate processes in wastewater treatment plants. In this study, the simultaneous, long-term, stable removal of phosphorus and nitrogen was achieved in a high-loading anammox attached film expanded bed (AAFEB) reactor. As an energy-saving and high-efficiency biological process, the anammox reaction performed stable and high nitrogen removal. In addition, the chemical environment and hydrodynamic conditions of the AAFEB system, as well as the microenvironment of the anammox granules, induced the crystallization of hydroxyapatite (HAP). As an inorganic carrier of anammox biofilms, HAP enhanced the settling velocity and shear strength of the anammox granules and thus promoted the operational stability of the AAFEB reactor. In the coupled anammox–HAP system, the nitrogen removal rate reached 44.8 g fo N/(L/day), with a stable phosphorus removal rate of 71.61 ± 6.82%. The results indicated that the coupled anammox–HAP system enhanced the nitrogen removal performance and provided a possible phosphorus recovery pathway through biomineralization processes.

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“…Yet, some phosphate should remain available in order to assure biomass growth [145]. Moreover, when culturing anammox granular biomass, phosphate availability can contribute to enhance settleability and other mechanical properties of the granules due to the accumulation of CaP precipitates [146][147][148][149].…”

Section: Phosphorus Recovery Before Biological N Treatment (Upstream Configuration)mentioning

confidence: 99%

Recovery of Phosphorus from Waste Water Profiting from Biological Nitrogen Treatment: Upstream, Concomitant or Downstream Precipitation Alternatives

et al. 2020

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Mined phosphate rock is the largest source of phosphorus (P) for use in agriculture and agro-industry, but it also is a finite resource irregularly distributed around the world. Alternatively, waste water is a renewable source of P, available at the local scale. In waste water treatment, biological nitrogen (N) removal is applied according to a wide range of variants targeting the abatement of the ammonium content. Ammonium oxidation to nitrate can also be considered to mitigate ammonia emission, while enabling N recovery. This review focuses on the analysis of alternatives for coupling biological N treatment and phosphate precipitation when treating waste water in view of producing P-rich materials easily usable as fertilisers. Phosphate precipitation can be applied before (upstream configuration), together with (concomitant configuration), and after (downstream configuration) N treatment; i.e., chemically induced as a conditioning pre-treatment, biologically induced inside the reactor, and chemically induced as a refining post-treatment. Characteristics of the recovered products differ significantly depending on the case studied. Currently, precipitated phosphate salts are not typified in the European fertiliser regulation, and this fact limits marketability. Nonetheless, this topic is in progress. The potential requirements to be complied by these materials to be covered by the regulation are overviewed. The insights given will help in identifying enhanced integrated approaches for waste water treatment, pointing out significant needs for subsequent agronomic valorisation of the recovered phosphate salts, according to the paradigms of the circular economy, sustainability, and environmental protection.

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Insight into the short- and long-term effects of inorganic phosphate on anammox granule property

Cited by 69 publications

References 33 publications

Comparison of three anaerobic digestion reactors for low‐carbon wastewater treatment

Comparison of three anaerobic digestion reactors for low‐carbon wastewater treatment

Enhanced Simultaneous Nitrogen and Phosphorus Removal Performance by Anammox–HAP Symbiotic Granules in the Attached Film Expanded Bed Reactor

Recovery of Phosphorus from Waste Water Profiting from Biological Nitrogen Treatment: Upstream, Concomitant or Downstream Precipitation Alternatives

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