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production of study on optimal conditions of high purity poly ferric chloride in china

  • Study on optimal conditions of poly ferric chloride

    2021-1-1 · Study on optimal conditions of poly ferric chloride (PFC) dosage treating tannery wastewater Author links open overlay panel Thanh Tran a b c Duc Anh Le a b d Nguyen Hong Hai a b c Tran Phi Hung a e Nguyen Cong Danh a e Lam Van Tan a f Vo Thi Dieu Hien e Xuan-Thanh Bui b c g

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  • Comparison of poly ferric chloride and poly titanium ...

    2021-1-28 · The current study investigated the efficiency of poly ferric chloride (PFC) and poly titanium tetrachloride (PTC) in coagulation-flocculation process for treatment of paper and cardboard wastewater. The effect of pH (5–11), coagulant concentrations (100–1000 mg/L), mixing rate (10–60 rpm), mixing time (5–25 min), and settling time (5–30 min) were examined.

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  • Preparation and coagulation efficiency of

    2011-7-1 · Journal of Environmental Sciences 2011, 23(7) 1122–1128 Preparation and coagulation efficiency of polyaluminium ferric silicate chloride composite coagulant from wastewater of high-purity graphite production Xiaoxia Niu ∗ , Xili Li, Jihong Zhao, Yigang Ren, Yanqin Yang Henan Provincial Key Laboratory of Surface and Interface Science, School of Materials and Chemical Engineering ...

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  • Preparation and performance of a high purity poly

    2010-1-1 · Poly-aluminum chloride (PACl) is one of the common coagulants for water and wastewater treatment. A new Chinese national standard of PACl has been implemented, where the concentration of insoluble substances, iron and heavy metals is to be controlled strictly, then researches on the preparation of high-purity PACl are needed.

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  • Efficiency Comparison of PolyDADMAC Coagulant

    2017-11-1 · The aim of this study was to evaluate and compare of PolyDADMAC with ferric chloride as a coagulant on the removal of turbidity, Coliform and Organic matter from Ahvaz drinking water. Materials and Methods: This study was carried out in a lab scale and using a …

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  • Mechanistic insights into the effect of poly ferric ...

    2021-2-1 · 1. Introduction. Poly ferric sulfate (PFS), the polymerized iron salts, can provide a variety of nucleic hydroxyl high-valence complex ions and hydrolyze to the highly cross-linked hydrophobic multinucleate and multichain-hydroxyl polymers after dissolving in aqueous phase, making it possess the high coagulation efficiency (Jiang et al., 1998; Zouboulis et al., 2008).

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  • Evaluation of Ferric Chloride as a Coagulant for Cork ...

    2005-7-8 · This is a two-part work on the chemistry of iron(III) as coagulant in the treatment of cork processing wastewater. The main aim of the first part was to determine the removal of organic matter as measured by reductions in chemical oxygen demand (COD), polyphenols (P), and aromatic compounds (A) that can be obtained using this physicochemical process.

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  • Effect of pH on floc properties and membrane

    2015-7-1 · Ferric chloride (FeCl 3) and polyferric chloride with basicity of 1.0 and 2.2 (denoted as PFC 10 and PFC 22) were used as coagulants and Fe (III) species in them was measured by a timed complexation spectroscopy method. Floc properties under four pH conditions were evaluated using a laser diffraction particle sizing device.

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  • Preparation and Characteristics of Polyaluminium

    2020-8-1 · High rate Arsenic (As (V)) removal from contaminated water resources was investigated by simultaneous presence of poly titanium chloride (PTC) and Fe 2 O 3-Mn 2 O 3 nanocomposite in the enhanced coagulation process along with precipitated flocs recirculation. In this study, the synthesis of Fe 2 O 3-Mn 2 O 3 and PTC and their characteristics, the effective parameters in the enhanced ...

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  • Polyhydroxybutyrate production in halophilic

    To determine optimal growth and production conditions, environments with different salinity, carbon sources, and nitrogen sources were evaluated. We found that the use of a medium containing 2% (w/v) fructose, 0.3% (w/v) yeast extract, and 5% (w/v) sodium chloride (NaCl) in M9 minimal medium resulted in high PHA content (54.7%) and biomass (4 ...

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  • Preparation and Characteristics of Polyaluminium

    Clay-brine process employing activated clay, NaCl, HCl, and HF as raw materials is the primarily advanced technology to synthesize cryolite in the present industrial grade. However, plenty of byproducts of fluorine-containing waste HCl at the concentration of about 10%~12% could not be utilized comprehensively and are even hazardous to the environment.

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  • Optimization of biomass, total carotenoids and

    This study was made to discover optimal conditions for biomass and astaxanthin production in H. pluvialis from Steptoe, Nevada (USA), cultured in batch mode. Growth was carried out under autotrophic (with NaNO3, NH4Cl and urea) and mixotrophic conditions (with 4, 8, 12 mM sodium acetate) under two photon flux densities (PFD) (35 and 85 mumol m ...

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  • Study on Chromaticity Removal from Mineral Processing ...

    2021-3-30 · colorization ratio, but it also has the disadvantages of strong corrosion, high chloride ion concentration in wastewater, and high toxicity of intermediate products [13]. Fenton reaction is one of the commonly used advanced oxidation processes (AOPs), which has the advantages of high safety, simple equipment, and low cost, but there is a

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  • A Study on Ceramsite Production Using Dredging

    Dredging sea mud produced during the coastal infrastructure construction has been gradually becoming an environmental problem in China. Making ceramsite is an attractive way to convert the waste sea mud to resources used for many industrial sectors. However, the imapct of preheating and sintering conditions on the ceramsite properties and the biofilm formation capacity of the ceramsite are ...

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  • Cost-effective removal of COD in the pre-treatment

    2019-9-26 · Under the optimal operational conditions (pH = 7.5, T = 18 °C) the treatment of wastewater from paper industries by coagulation has led to a reduction of 70% COD for wastewater discharged. In terms of the investigated paper industry wastewater, polyaluminium chloride appears to be most suitable for treatment of high COD concentration.

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  • Characterization and optimization of extracellular

    2021-3-31 · This work aims to study the optimal conditions of the fermentation culture medium used for the production of extracellular enzymes (amylase, cellulase, lipase, and protease) from previously isolated Aspergillus niger strains in date by-products. The five most powerful isolates selected based on the zone of degradation formed on Petri plates by the substrate were subjected to the quantitative ...

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  • Hongjuan SUN | PhD | Southwest University of

    High-purity CaCO3 via a facile two-step dissolution-carbonation coprecipitation procedure using NH4Cl, NH4OH and CO2 with phosphogypsum as the raw material was successfully produced in the present ...

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  • Role of Functional Beverages on Sport Performance

    2018-10-10 · 1. Introduction. Functional foods are defined by the European Commission as “a food product that can only be considered functional if together with the basic nutritional impact it has beneficial effects on one or more function of the human organism thus either improving the general physical conditions or/and decreasing the risk of the evolution of disease” [].

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  • Drivers of greenhouse gas emissions from standing

    2021-5-10 · Coastal freshwater forested wetlands are rapidly transitioning from forest to marsh, leaving behind many standing dead trees (snags) in areas often called ‘ghost forests’. Snags can act as conduits for soil produced greenhouse gases (GHG) and can also be sources as they decompose. Thus, snags have the potential to contribute GHGs to the atmosphere, but emissions are not well understood.

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  • Efficient fermentative production of polymer-grade

    2016-1-12 · Results. In this study, we developed a process for high-optical-purity d-lactate production using an engineered alkaliphilic Bacillus strain. First, the native l-lactate dehydrogenase gene (ldh) was knocked out, and the d-lactate dehydrogenase gene from Lactobacillus delbrueckii was introduced to construct a d-lactate producer.The key gene responsible for exopolysaccharide biosynthesis (epsD ...

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  • Study of Esterification Waste water Treatment by

    2018-12-12 · In this study, the Esterification wastewater was treated by three kinds of flocculants (poly aluminum chloride (PAC), polymeric ferric sulfate (PFS), poly aluminum ferric chloride (PAFC)), the influences of flocculent concentration, temperature and pH on …

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  • Using submerged fermentation to fast increase N6

    2019-12-9 · In this study, C. cicadae NTTU 868 was a high production strain for HEA and polysaccharide productions. This study researched optimal solid fermentation conditions in order to develop the artificial culture technology. In previous research, it was shown that artificial-cultured C. cicadae fruit bodies grew in silkworms (Hu et al. 2009).

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  • High-poly-aluminum chloride sulfate coagulants

    2020-2-18 · High-poly-aluminum chloride sulfate (HPACS) coagulants with different [SO 4 2−]/[Al 3+] molar ratio (S) were prepared and proved to have high coagulation efficiency for the removal of humic acid and strong stability for storage and application.The results showed that the higher the SO 4 2− addition, the bigger the aluminum polymerization particles and the more the polymerization Al c ...

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  • Preparation and characterization of 10 B boric acid

    2016-7-28 · Boric acid is often added into coolant as neutron capture agent for pressurized water reactor, whose amount is influenced by its abundance and purity. Therefore, the preparation of enriched 10B boric acid with high purity is beneficial to nuclear industry. 10B is also used in developing tumor-specific boronated drugs in boron neutron capture therapy.

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  • Comparison of hot-water extraction and steam

    2014-3-26 · The performance of hot-water extraction (HWE) and steam treatment (ST), followed by kraft pulping were compared for production of high purity-grade dissolving pulp from green bamboo. With the same prehydrolysis intensity (represented by the P-factor), the fractionation efficiency of HWE is far lower than that of ST. Because of lower removal of non-cellulosic components, the solid residue from ...

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  • Flocculation of a High-Turbidity Kaolin Suspension Using ...

    2019-2-18 · coagulants, such as aluminum sulfate, poly (ferric chloride) and poly (aluminum chloride) [7], which have been used in high-turbidity water purification. However, the application of inorganic coagulants in high-turbidity water treatment is restricted by the excessive amount needed, the uneconomical cost, and residual chemicals [8].

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  • Progresses in Synthesis of Polycarboxylate

    2020-7-3 · The prerequisite to synthesize PCE was to prepare new macromonomers with controlled molecular mass, adjustable hydrophilic-lipophilic groups, long-chain alkyl groups, and large terminal hydroxyl groups as well. Structural modifications in the molecular scale of polycarboxylate superplasticizer (PCE) would lead to changes in properties of dispersion and water retention as well …

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  • Preparation of ZnSO 4 ·7H 2 O using filter cake

    2017-11-24 · Under the conditions of the optimal parameters, the content of ZnSO 4 ∙7H 2 O in the product obtained by chemical analysis was 98.6%, and the …

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  • Frontiers | High-Level Extracellular Expression of a

    2021-3-11 · N-acetyl-β-D glucosamine (GlcNAc) is wildly used in cosmetics, nutraceuticals and pharmaceuticals. The traditional chemical process for GlcNAc production from chitin causes serious acidic pollution. Therefore, the enzymatic hydrolysis becomes a great promising and alternative strategy to produce GlcNAc. β-N-acetylglucosaminidase (NAGase) can hydrolyze chitin to produce GlcNAc.

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  • Study of Esterification Waste water Treatment by

    2018-12-12 · In this study, the Esterification wastewater was treated by three kinds of flocculants (poly aluminum chloride (PAC), polymeric ferric sulfate (PFS), poly aluminum ferric chloride (PAFC)), the influences of flocculent concentration, temperature and pH on …

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  • ORIGINAL ARTICLE Open Access Co-production of ...

    2021-5-21 · The optimal medium and cultural conditions for PHB and CoQ 10 co-production by Methylobacterium sp. XJLW was in M3 medium containing 7.918 g L-1 methanol, 0.5 g L-1 of ammonium sulfate, 0.1% (v/v) of Tween 80, and 1.0 g L-1 of sodium chloride, under 30 °C and pH 7.0. In

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  • Preparation of FeS 2 /TiO 2 nanocomposite films and

    2021-4-5 · Figure 6 shows the XPS spectra of FeS 2 /TiO 2 nanocomposite film prepared under hydrothermal reaction time of 12 h, ferric chloride concentration of 0.15 mmol/L and reaction temperature of …

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  • Microalgae Chlorella vulgaris biomass harvesting by ...

    2018-6-28 · The objectives of this study were: (1) to evaluate chitosan flocculation performance in the harvesting of C. vulgaris biomass and determine its optimal dose, (2) to disclose the sedimentation properties of C. vulgaris biomass flocculated by chitosan, (3) to reveal the recyclability of the spent medium from flocculation to regrow microalgae and ...

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  • Improved production of melanin from Aspergillus

    2015-11-24 · Melanins are indolic polymers produced by many genera included among plants, animals and microorganisms and targeted mainly for their wide range of applications in cosmetics, agriculture and medicine. An approach to analyse the cumulative effect of parameters for enhanced melanin production was carried out using response surface methodology. In this present study, optimization of media and ...

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  • Frontiers | Large-Scale Recombinant Production of the

    2021-5-10 · Production of isolated fl nsp14 was successful, however, with limited yield and stability . Expression of the isolated MTase domain resulted in soluble protein with 27.5 kDa mass that was amenable to NMR characterization , although only under reducing conditions and in the presence of high (0.4 M) salt concentration. nsp15

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  • The Impact of Zeta Potential on the Physical

    2006-5-3 · The physical properties of natural organic matter (NOM) flocs, such as size, growth rate, and strength, were investigated using a laser diffraction particle sizing device. Conditions were set such that varying carbon coagulant ratio and zeta potential could both be investigated. Results demonstrated a link between zeta potential and coagulation and flocculation performance, with the production ...

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  • High-Purity Metals & Alloys - Sigma-Aldrich

    2014-1-29 · D-2,3-butanediol has many industrial applications such as chiral reagents, solvents, anti-freeze agents, and low freezing point fuels. Traditional D-2,3-butanediol producing microorganisms, such as Klebsiella pneumonia and K. xoytoca, are pathogenic and not capable of producing D- 2,3-butanediol at high optical purity. Bacillus licheniformis is a potential 2,3-butanediol producer but the wild ...

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  • Deletion of meso -2,3-butanediol dehydrogenase

    2021-3-11 · N-acetyl-β-D glucosamine (GlcNAc) is wildly used in cosmetics, nutraceuticals and pharmaceuticals. The traditional chemical process for GlcNAc production from chitin causes serious acidic pollution. Therefore, the enzymatic hydrolysis becomes a great promising and alternative strategy to produce GlcNAc. β-N-acetylglucosaminidase (NAGase) can hydrolyze chitin to produce GlcNAc.

    Get Price
  • Efficient fermentative production of polymer-grade

    2016-1-12 · In this study, we developed a process for high-optical-purity d-lactate production using an engineered alkaliphilic Bacillus strain. First, the native l -lactate dehydrogenase gene ( ldh ) was knocked out, and the d -lactate dehydrogenase gene from Lactobacillus delbrueckii was introduced to construct a d -lactate producer.

    Get Price
  • Improvement of the process of removing

    2019-6-1 · At optimal operating conditions of Fe:P (w/w) ratio = 2.40, pH = 6.48 and FMS = 100 rev min − 1, 97.85% removal of phosphorus was achieved. Moreover, compared with the one-off dosage, the three-step process treatment can save 50% of the cost in terms of ferric chloride when treating the same amount of distillery effluent.

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  • Study of the coagulation process in wastewater

    The optimal conditions were as follows: Coagulant dosage of 871 mg/L, flocculent dosage of 22.3 mg/L and pH 8.35. The study of dairy effluents treatment by EC was carried out using aluminum electrodes. The analysis of the filtrates showed that the COD was reduced to 61% while the removal of phosphorus, nitrogen contents and turbidity were 89 ...

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  • Multiple response optimization of the coagulation

    2016-5-18 · To meet the high quality standard of receiving water, the coagulation process using polyferric chloride (PFC) was used to further improve the water quality of effluent from wastewater treatment ...

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  • Protein production and purification | Nature Methods

    2008-1-30 · For high-level protein production purposes, BL21(DE3) is an appropriate E. coli strain. It has the advantage of being deficient in both lon and ompT proteases and it is compatible with the T7 lac ...

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  • Flocculation of a High-Turbidity Kaolin Suspension Using ...

    2019-2-18 · coagulants, such as aluminum sulfate, poly (ferric chloride) and poly (aluminum chloride) [7], which have been used in high-turbidity water purification. However, the application of inorganic coagulants in high-turbidity water treatment is restricted by the excessive amount needed, the uneconomical cost, and residual chemicals [8].

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  • Study on the isoprene-producing co-culture system

    2021-1-7 · Therefore, the optimal light conditions can finally contribute to the high cell density co-culture with proper ratio of S. elongatus PCC 7942 and E. coli BL21(DE3). Thirdly, the glucose and nitrogen limitation, the induction mode and betaine supplementation were found to be the key factors for isoprene production through the systematical ...

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  • Simultaneously Recovering High-Purity Chromium

    2016-1-6 · Chromium pollution is a serious issue because of carcinogenic toxicities of the pollutants and low recovery rate of chromium because of the presence of organic, such as protein and fat. In this work, high recovery rate and high purity of the chromium ion were successfully prepared by the way of acid enzyme, flocculant, and Fenton oxidation. The experiments were characterized by TG, TOC, UV-VIS ...

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  • Synthesis, Production, and Biotechnological

    The extreme thermoacidophile Sulfolobus solfataricus strain MT4 and strain MT3 were observed to produce a sulfated-, glucose-, mannose-, glucosamine-, and galactose-containing exopolysaccharide during growth under optimal conditions.The maximum production was reached during the stationary phase of growth and the yields obtained were 8.4 mg/L and 7.0 mg/L for MT4 and MT3 strains, …

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  • High-level semi-synthetic production of the potent ...

    2013-4-10 · Saccharomyces cerevisiae is engineered to produce high concentrations of artemisinic acid, a precursor of the artemisinin used in combination therapies for malaria treatment; an efficient and ...

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  • Preparation of FeS2/TiO2 nanocomposite films and

    2021-4-5 · Preparation of FeS 2 /TiO 2 nanocomposite films. FeS 2 /TiO 2 nanocomposite films were prepared by hydrothermal deposition of FeS 2 nanoparticles on TiO 2 nanotubes. The detailed process is as follows: Firstly, FeCl 3 ·9H 2 O was dissolved with secondary water in a 100 mL beaker, and prepare 35 mL FeCl 3 solutions with concentrations of 5 mmol/L, 10 mmol/L and 20 mmol/L respectively, then ...

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  • Study of Esterification Waste water Treatment by

    2018-12-12 · In this study, the Esterification wastewater was treated by three kinds of flocculants (poly aluminum chloride (PAC), polymeric ferric sulfate (PFS), poly aluminum ferric chloride (PAFC)), the influences of flocculent concentration, temperature and pH on …

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  • Optimal Corrosion Control Treatment Evaluation

    2019-7-23 · Optimal Corrosion Control Treatment Evaluation Technical Recommendations for Primacy Agencies and Public Water Systems Office of Water (4606M) EPA 816-B-16-003

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  • Experimental Study on Non-Autoclaved PHC Pile

    Study results show that through the use of a polycarboxylate superplasticizer, an optimal 8-hour curing system and concrete mix ratio, the strength of non-autoclaved concrete reached 93.2MPa within one day, with the ratio of tensile and compressive strength of 6.07%, the coulomb electric flux of 85C, and the chloride migration coefficient of 0 ...

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  • Flocculation of a High-Turbidity Kaolin Suspension Using ...

    2019-2-18 · coagulants, such as aluminum sulfate, poly (ferric chloride) and poly (aluminum chloride) [7], which have been used in high-turbidity water purification. However, the application of inorganic coagulants in high-turbidity water treatment is restricted by the excessive amount needed, the uneconomical cost, and residual chemicals [8].

    Get Price
  • The Impact of Zeta Potential on the Physical

    2006-5-3 · The physical properties of natural organic matter (NOM) flocs, such as size, growth rate, and strength, were investigated using a laser diffraction particle sizing device. Conditions were set such that varying carbon coagulant ratio and zeta potential could both be investigated. Results demonstrated a link between zeta potential and coagulation and flocculation performance, with the production ...

    Get Price
  • Studies on Culture and Osteogenic Induction of

    2012-9-1 · 2.2. Preparation of experimental culture and osteogenic medium. The conventional culture medium used in the following experiments was L-DMEM (Gibco BRL, Cargo number 11885084), which is composed of various amino acids, vitamins, inorganic salts (including 3.7 g/L sodium bicarbonate), glucose, pyruvic acid, and so on, as can be seen in Table 1.The conventional culture medium was …

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  • Microalgae Chlorella vulgaris biomass harvesting by ...

    2018-6-28 · The objectives of this study were: (1) to evaluate chitosan flocculation performance in the harvesting of C. vulgaris biomass and determine its optimal dose, (2) to disclose the sedimentation properties of C. vulgaris biomass flocculated by chitosan, (3) to reveal the recyclability of the spent medium from flocculation to regrow microalgae and ...

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  • ENCAPSULATION OF PRECIPITATED CALCIUM

    2018-11-9 · Sang, Iran. Poly aluminum chloride with 28-31% AL 2 O 3 obtained from Falizan Tasfyeh Co. Ltd., Iran. Cationic poly Acrylamide denoted as CPAM was purchased from Yixing Cleanwater Chemicals Co., Ltd., Yixing, China. NaOH pellets with purity of 98% were purchased from Merck, Germany. Table 1. Characteristics of pulp after refining.

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  • Deletion of meso -2,3-butanediol dehydrogenase

    2014-1-29 · D-2,3-butanediol has many industrial applications such as chiral reagents, solvents, anti-freeze agents, and low freezing point fuels. Traditional D-2,3-butanediol producing microorganisms, such as Klebsiella pneumonia and K. xoytoca, are pathogenic and not capable of producing D- 2,3-butanediol at high optical purity. Bacillus licheniformis is a potential 2,3-butanediol producer but the wild ...

    Get Price
  • Optimizing Coagulation Process for Low to High

    Approach: In this study, the effectiveness of aluminum sulfate and ferric chloride was evaluated at different pH values and coagulant dosage to find optimal operational conditions for low to high turbidity waters. The influence of lime, as a coagulant aid, on coagulation process was also studied.

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  • ISSN: 0975-766X CODEN: IJPTFI Available Online through ...

    2016-7-24 · The results showed that after using the poly aluminum chloride, ferrous sulfate, ferric chloride and aluminum sulfate coagulants, in the turbidity of 200, 100, 50, 20, 10 NTU, the pH level have reduced in a way that by increasing each mg/l poly aluminum chloride, ferrous sulfate, ferric chloride about 0.01 unit pH have reduced.

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  • The Effect of pH on the Stability of Grease and Oil in ...

    2009-1-8 · 3. The pH effect on grease and oil removal by ferric chloride coagulation The use of ferric chloride in the range of 0.5 – 10.0 g/L with uncontrolled pH showed an ineffective grease and oil demulsification. But when the ferric chloride was increased into the range of 1-1.5 g/L and pH was controlled at 5, the oil layer at water surface could ...

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  • Reactor Project: Ammonia Synthesis

    1997-10-17 · Ammonia synthesis optimization is a topic of high interest in industry as the market continues to expand and demand increases. This proposed process is designed to produce 1,016 metric tons/day of ammonia at a feed of 5,500 kmol/hr while maintaining the best compromise between production and purity.

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  • David Dreisinger - UBC Professor - Faculty Member ...

    The traditional electrowinning process is not suitable for the production of high-purity manganese. Therefore, a novel ion exchange - electrorefining process for production of high-purity manganese is proposed to solve the problems. The ammonium chloride – manganese chloride electrolyte was selected as the most promising for refining.

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  • Complete biosynthesis of a sulfated chondroitin in ...

    2021-3-2 · Overall, employing optimal induction conditions improved the CS sulfation in E. coli K4ΔkfoEΔcysH(DE3) pETM6-S w from ~19% to ~23%. Fig. 4: Effect of fermentation conditions …

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  • Role of Functional Beverages on Sport Performance

    2018-10-10 · 1. Introduction. Functional foods are defined by the European Commission as “a food product that can only be considered functional if together with the basic nutritional impact it has beneficial effects on one or more function of the human organism thus either improving the general physical conditions or/and decreasing the risk of the evolution of disease” [].

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  • Study on the effect of chitosan conditioning on sludge ...

    2019-2-1 · Activated sludge process is one of the main widely used methods in domestic sewage and industrial waste water treatment currently. A large amount of residual sludge is produced during domestic sewage treatment with the activated sludge process (Tang & Zhang 2014).The residual sludge contains a lot of nutrients, such as nitrogen, phosphorus, and organic matter, and at the same time contains a ...

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  • Phase I/II study of COVID-19 RNA vaccine BNT162b1

    2021-6-11 · Hydrated chloride salts, embedded in either pore space or within the rock matrix, will also produce H 2, though at lower production efficiencies relative to pure water, ice, or brine (LaVerne and Tandon, 2005). These different production efficiencies are summarized in the work of Tarnas et al. .

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