scholarly journals Optimization of induced crystallization reaction in a novel process of nutrients removal coupled with phosphorus recovery from domestic wastewater

2017 ◽  
Vol 43 (4) ◽  
pp. 33-38
Author(s):  
Haiming Zou ◽  
Yan Wang
Keyword(s):  
Domestic Wastewater ◽  
Aeration Rate ◽  
Phosphorus Recovery ◽  
Optimum Process ◽  
Nutrients Removal ◽  
Practical Application ◽  
Recovery Method ◽  
Effective Technology ◽  
Crystallization Reaction ◽  
Induced Crystallization

AbstractPhosphorus removal and recovery from domestic wastewater is urgent nowadays. A novel process of nutrients removal coupled with phosphorus recovery from domestic sewage was proposed and optimization of induced crystallization reaction was performed in this study. The results showed that 92.3% of phosphorus recovery via induced Hydroxyapatite crystallization was achieved at the optimum process parameters: reaction time of 80 min, seed crystal loads of 60 g/L, pH of 8.5, Ca/P mole ratio of 2.0 and 4.0 L/min aeration rate when the PO43--P concentration was 10 mg/L in the influent, displaying an excellent phosphorus recovery performance. Importantly, it was found that the effect of reaction temperature on induced Hydroxyapatite crystallization was slight, thus favoring practical application of phosphorus recovery method described in this study. From these results, the proposed method of induced HAP crystallization to recover phosphorus combined with nutrients removal can be an economical and effective technology, probably favoring the water pollution control and phosphate rock recycle.

scholarly journals A NOVEL PROCESS FOR NUTRIENTS REMOVAL AND PHOSPHORUS RECOVERY FROM DOMESTIC WASTEWATER BY COMBINING BNR WITH INDUCED CRYSTALLIZATION

2014 ◽  
Vol 22 (4) ◽  
pp. 274-283 ◽  
Author(s):  
Haiming ZOU ◽  
Xiwu LU ◽  
Ting LI
Keyword(s):  
Domestic Wastewater ◽  
Recovery Process ◽  
Phosphorus Recovery ◽  
Small Scale ◽  
Nutrients Removal ◽  
Nitrogen And Phosphorus ◽  
Effluent Quality ◽  
Mineral Phosphorus ◽  
Removal Efficiencies ◽  
Induced Crystallization

An excessive discharge of phosphorus from wastewater to water bodies may potentially contribute to eutrophication. On the other hand, mineral phosphorus resources will be depleted in the near future, because of difficulty to automatically recycle from water to land, unlike nitrogen. A new process for nutrients removal coupled with phosphorus recovery was proposed in this study by combining biological nutrients removal (BNR) with induced crystallization (IC), BNR-IC for short later, differently from conventional phosphorus recovery process. Our results showed that the BNR-IC system can maintain not only high and stable carbon, nitrogen and phosphorus removal efficiencies, all presenting above 90%, but also good phosphorus recovery performance from synthetic domestic wastewater, displaying about 70.2% of phosphorus recovery rate. When the COD, TN, NH4–N and P concentrations of 250 mg L−1, 42 mg L−1, 40 mg L−1, and 10 mg L−1, respectively were given in the influent, a stable removal efficiencies of 92.5% COD, 78.6% TN, 85.9% NH4–N and 95.2% P were obtained for the BNR-IC process and correspondingly the COD, TN, NH4–N and P concentrations of 18.75 mg L−1, 8.99 mg L−1, 5.64 mg L−1, 0.42 mg L−1 were monitored in the effluent, meeting the Chinese National Class I (grade A) Sewage Discharge Standard. Analyses of SEM and EDS, moreover, also demonstrated that the surface of seed crystal (calcite used here) was completely covered by hydroxyl calcium phosphate (HAP) produced during the induced crystallization process to recover phosphorus. Although our study involved only a small-scale trial, the proposed BNR-IC process here may be a promising technology, and can potentially aid in improvement of the effluent quality from WWTP and in recycle of mineral phosphorus resources when applied to practice.

scholarly journals AN INNOVATIVE CONTINUOUS FLOW BNR-IC PROCESS FOR NUTRIENTS REMOVAL AND PHOSPHORUS RECOVERY FROM SYNTHETIC AND REAL DOMESTIC WASTEWATER

2016 ◽  
Vol 24 (2) ◽  
pp. 116-123
Author(s):  
Haiming ZOU ◽  
Xiwu LU
Keyword(s):  
Continuous Flow ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Phosphorus Recovery ◽  
Synthetic Wastewater ◽  
Nutrients Removal ◽  
Flow Process ◽  
Gradient Gel Electrophoresis ◽  
P Recovery

An innovative continuous flow process linking biological nutrients removal (BNR) with induced crystallization (IC) was used to remove nutrients and recover phosphorus (P) from synthetic and real domestic wastewater. The results showed that a good nutrients removal performance was found regardless of feeding solutions. P recovery efficiency from synthetic wastewater was 70.2% slightly less than that from real domestic sewage (74.2%). Importantly, P recovery can effectively enhance the subsequent biological P removal. Polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analysis displayed an obvious shift in microbial community structure when switching feeding synthetic solution to real wastewater. A total of 13 bands were detected in sludge samples using synthetic and real domestic sewage, affiliated with 8 phyla or classes domain Bacteria (Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Flavobacteria, Actinobacteria, Sphingobacteria, Epsilonproteobacteria and Chlorobia). The results obtained here suggest that the continuous flow BNR-IC process is feasible for nutrients removal and P recovery from domestic sewage and is a promising technology for wastewater treatment combined with recycling of P elements.

Chemical and Biological Processes for Nutrients Removal and Recovery

2020 ◽  
pp. 102-138
Author(s):  
Dafne Crutchik Pedemonte ◽  
Nicola Frison ◽  
Carlota Tayà ◽  
Sergio Ponsa ◽  
Francesco Fatone
Keyword(s):  
Nutrient Removal ◽  
Nitrogen Concentration ◽  
Chemical Precipitation ◽  
Phosphorus Recovery ◽  
Nutrients Removal ◽  
Operational Parameters ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Accumulation ◽  
Biological Phosphorus ◽  
Removal And Recovery

This chapter gives an overview on the main technologies for nutrient removal from industrial wastewater by focusing on principles and operational parameters of real applications. A plethora of technologies can achieve the nutrients removal from wastewater depending mainly on their concentration and forms; however, biological nitrification and denitrification and chemical precipitation are the most common processes used today to remove nitrogen and phosphorus, respectively. Stripping, adsorption and membrane based processes for nutrients recovery can be economically viable only when nitrogen concentration is higher than 1.5-2 gN/L. On the other hand, phosphorus recovery should always be pursued and struvite crystalization is the most common option that should be evaluated together with biological phosphorus accumulation in sludge or plants for the following post-processing and valorization.

Rethinking wastewater biosolids, phosphorus recovery and sustainability

2007 ◽  
Vol 2 (4) ◽  
Author(s):  
D. Davelaar
Keyword(s):  
Ecological Theory ◽  
Domestic Wastewater ◽  
Phosphorus Recovery ◽  
Ecological Approach ◽  
Bottom Line ◽  
Best Management ◽  
Proper Management ◽  
The Future ◽  
Environmental Understanding ◽  
Agricultural Demand

This paper aims at bringing about an urgently required, scientific shift of perception in the field of biosolids management and phosphorus recovery from domestic wastewater. The paper shows that under a combination of the prevailing sludge, phosphorus and sustainability paradigms, the worldwide rapidly growing issue on biosolids production leads to a paradox that proper management cannot resolve alone. Change demands for a sound fundamental ecological approach in all sectors involved. To produce low quantities of biosolids of high fertilizing quality that can harmlessly be stored or, functionally applied in relation to agricultural demand is a master challenge for the future, not only technologically. A deep transformation of societal beliefs and structures, economic processes and environmental understanding is equally imperative. The traditional pillars of sustainability will collapse under the tons of daily sludge production unless individually fortified and collectively integrated in a fundamental ecological, single-bottom-line concept of sustainability. Moving forward by meticulously matching, in all domains, practice with ecological theory and science will develop the synergy required for progress and success. The best management device reverses to ‘act globally, think locally’.

scholarly journals Perspectives on Microalgal Biofilm Systems with Respect to Integration into Wastewater Treatment Technologies and Phosphorus Scarcity

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2245
Author(s):  
Kateřina Sukačová ◽  
Daniel Vícha ◽  
Jiří Dušek
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
New Technologies ◽  
Wastewater Treatment Plants ◽  
Phosphorus Uptake ◽  
Phosphorus Recovery ◽  
Practical Application ◽  
High Concentration ◽  
Water Ecosystem ◽  
Treatment Technologies

Phosphorus is one of the non-renewable natural resources. High concentration of phosphorus in surface water leads to undesirable eutrophication of the water ecosystem. It is therefore necessary to develop new technologies not only for capturing phosphorus from wastewater but also for phosphorus recovery. The aim of the study was to propose three different integration scenarios for a microalgal biofilm system for phosphorus removal in medium and small wastewater treatment plants, including a comparison of area requirements, a crucial factor in practical application of microalgal biofilm systems. The area requirements of a microalgal biofilm system range from 2.3 to 3.2 m2 per person equivalent. The total phosphorus uptake seems to be feasible for construction and integration of microalgal biofilm systems into small wastewater treatment plants. Application of a microalgal biofilm for phosphorus recovery can be considered one of the more promising technologies related to capturing CO2 and releasing of O2 into the atmosphere.

Development of a high-efficiency phosphorus recovery method using a fluidized-bed crystallized phosphorus removal system

2003 ◽  
Vol 48 (1) ◽  
pp. 163-170 ◽  
Author(s):  
K. Shimamura ◽  
T. Tanaka ◽  
Y. Miura ◽  
H. Ishikawa
Keyword(s):  
Particle Size ◽  
Fluidized Bed ◽  
Phosphorus Removal ◽  
Seed Crystal ◽  
Phosphorus Recovery ◽  
Main Reaction ◽  
Recovery Ratio ◽  
Recovery Method ◽  
Type Reactor ◽  
Removal System

The authors have been engaged in the research and development concerning the recovery of MAP (Magnesium Ammonium Phosphate) using a fluidized-bed crystallized phosphorus removal system. In the reactor of the fluidized-bed crystallized phosphorus removal system, seed crystals (of MAP) are fluidized previously and new MAP crystals are produced on the seed crystal surfaces. Conventionally, the reactor consisted of one reaction tank only, but this practice had the problem that as the crystallization progresses, the seed crystal is grown excessively and as a result, the effective reaction surface areas are decreased and the fluidization effect is degraded, causing the recovery ratio to be decreased. Recently, the authors have devised a two-tank type reactor by adding a sub reaction tank to the reactor (now the main reaction tank) so that the MAP particle size in the main reaction tank may be kept constant making the recovery ratio stable. They conducted a demonstration test with a pilot experimental system of the 2-tank type reactor. For raw water T-P 111 to 507 mg/L, the main reaction tank treated water T-P 14.0 to 79.5 mg/L and phosphorus recovery ratios 84 to 92% were obtained. Because the mean MAP particle size in the main reaction tank could be kept constant, the phosphorus recovery ratio could always be above 80%, realizing stable treatment.

Chemical and Biological Processes for Nutrients Removal and Recovery

2017 ◽  
pp. 76-111
Author(s):  
Dafne Crutchik Pedemonte ◽  
Nicola Frison ◽  
Carlota Tayà ◽  
Sergio Ponsa ◽  
Francesco Fatone
Keyword(s):  
Nutrient Removal ◽  
Nitrogen Concentration ◽  
Chemical Precipitation ◽  
Phosphorus Recovery ◽  
Nutrients Removal ◽  
Operational Parameters ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Accumulation ◽  
Biological Phosphorus ◽  
Removal And Recovery

This chapter gives an overview on the main technologies for nutrient removal from industrial wastewater by focusing on principles and operational parameters of real applications. A plethora of technologies can achieve the nutrients removal from wastewater depending mainly on their concentration and forms; however, biological nitrification and denitrification and chemical precipitation are the most common processes used today to remove nitrogen and phosphorus, respectively. Stripping, adsorption and membrane based processes for nutrients recovery can be economically viable only when nitrogen concentration is higher than 1.5-2 gN/L. On the other hand, phosphorus recovery should always be pursued and struvite crystalization is the most common option that should be evaluated together with biological phosphorus accumulation in sludge or plants for the following post-processing and valorization.

scholarly journals Effect of Aeration Rates on Removals of Organic Carbon and Nitrogen in Small Onsite Wastewater Treatment System (Johkasou)

2018 ◽  
Vol 147 ◽  
pp. 04008 ◽  
Author(s):  
Joni Aldilla Fajri ◽  
Tomonari Fujisawa ◽  
Yenni Trianda ◽  
Yasushi Ishiguro ◽  
Guangyu Cui ◽  
...  
Keyword(s):  
Organic Matter ◽  
Oxygen Supply ◽  
Domestic Wastewater ◽  
Aeration Rate ◽  
Simultaneous Nitrification And Denitrification ◽  
Carbon And Nitrogen ◽  
Onsite Wastewater ◽  
Onsite Wastewater Treatment System ◽  
Before And After ◽  
Onsite Wastewater Treatment

Onsite application of oxygen supply in domestic wastewater system may be influenced by several factors that can inhibit the oxidation and nitrification processes. In this study, the influence of aeration rate on the Johkasou performance was focused using two Johkasou facilities serving up to five persons household. In the Johkasou A (JO-A) system, we increased the aeration rate from 30 to 63 L.min-1 whereas, in the Johkasou B (JO-B), it was decreased from 59 to 34 L.min-1. Water and sludge samples were collected from the anaerobic-anoxic-oxic zones before and after adjustment of the aeration rate measured for organic matters and nitrogen parameters. Increasing the aeration rate in JO-A resulted in a high removal of organic matter (82.5%) and nitrogen (60.3%) compared to decreasing of aeration rate in JO-B (52.0% and 33.0%, respectively). Simultaneous nitrification and denitrification (SND) exhibited a maximum percentage when the aeration rate was increased compared to decreasing of aeration rate. These results indicate that application of a high aeration rate increases removal of organic matter and nitrogen and enhances ammonia transformation. It is therefore recommended to apply high aeration rates in Johkasou system.

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