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Oxygen deficiency of acid wastewater

Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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Oxygen deficiency of acid wastewater
ORIGINAL ARTICLE Evaluation of waste chicken feathers as ...
ORIGINAL ARTICLE Evaluation of waste chicken feathers as ...

the peptone from ,waste, chicken feathers by ,acid, hydroly-sis and to elucidate the usability of the obtained chicken ... Feathers ,were, washed with deionized ,water, and dried in ... NaOH, KOH, Mg(,OH,) ,2, and ,Ca,(,OH,) ,2 were used, for the neutralization of hydrolysates. At the end of …

Acidic and enzymatic saccharification of waste ...
Acidic and enzymatic saccharification of waste ...

2/10/2017, · The ,acid, hydrolysis contents ,were, filtered through cheese cloth to separate hydrolysate and residue. The hydrolysate was diluted to 1 L with distilled ,water, and the residue was dried at room temperature. White precipitates formed during neutralization of hydrolysate with ,Ca,(,OH,) ,2 were, removed through filtration.

The Pharmaceutical and Chemical Journal 2015 2(4):1-7
The Pharmaceutical and Chemical Journal 2015 2(4):1-7

The carbonised ,waste, coconut shell was weighed and poured in different beakers containing known quantity of dilute Hydrochloric ,acid,, Sulphuric ,acid,, Calcium hydroxide, and Sodium hydroxide (H ,2, SO 4, HCl, NaOH, and ,Ca,(,OH,) ,2,). The concentrations of the ,acid used were, already determined before this study. The content of the beakers

A Method for Recovery of N methyl 2 pyrrolidone from ...
A Method for Recovery of N methyl 2 pyrrolidone from ...

2,, Al(,OH,) 3, ,Ca,(,OH,) ,2,, and Polyacrylamide (PAM) with a constant loading of ,2, wt%. The process was conducted for ,2, min at stirring speed of 200 rpm, and for 5 min at stirring speed of 20 rpm. The formed flocs ,were, allowed to settle for 30 min and then separated from the solution by filtration [15]. Then the filtrates ,were, analyzed by HPLC.

ACID- AND BASE-CATALIZED HYDROLYSES OF CORN STALK
ACID- AND BASE-CATALIZED HYDROLYSES OF CORN STALK

Acetic acid was used as a representative organic acid, and Ca(OH)2 and NaOH were used as bases. Finally, pure water was just used as an extractive agent. 5 g of raw material and with the solution of the used reagents were placed in a closed bottle for autoclaving of 250 mL volume. The pH of all solutions, except water, were adjusted to a pH of around 4 for acids and 8 for bases. Table 1 shows the different …

Microwave assisted synthesis of CaO nanoparticles and use ...
Microwave assisted synthesis of CaO nanoparticles and use ...

study to treat synthetic ,acid, mine ,water, by synthesized ,Ca,(,OH,),2, nanoparticles shows higher efficiency to remove heavy metals than conventional use of lime. XRD results of precipitates show presence of different metal hydroxides and sulfate, precipitated as CaSO4. Keywords: Nanoparticles, CaO, XRD, HRTEM, ,Water, treatment

Characterisation of ashes from waste biomass power plants ...
Characterisation of ashes from waste biomass power plants ...

10/11/2019, · After leaching, The ,water,-soluble NaCl, K ,2, SO 4, ,and acid,-soluble calcite and ,Ca,(,OH,) ,2 were, no longer found in the leached residues, as shown in Fig. 1(a), but gypsum (CaSO 4 ·2H ,2, O) and SiO ,2, remained, as they are ,acid,-insensitive over the pH range studied.

Lead-acid battery recycling effluent treatment and ...
Lead-acid battery recycling effluent treatment and ...

Although NaOH is more expensive, it is also cleaner and more effective as it is a strong base, while ,Ca,(,OH,) ,2, is dirtier although cheaper. Its advantage is that the hydroxides formed are denser and easier to decant. Dispensing coagulant and flocculant Pb(,OH,) ,2, is a fine solid, so a coagulant (PAC type) has to be added that works over a high pH range along with a suitable polyelectrolyte (to be determined by Jar …

Removal of boron from wastewater by precipitation of a ...
Removal of boron from wastewater by precipitation of a ...

Preliminary experiments ,were, carried out at various temperatures by adding to the ,waste, solution different chemicals such as MgO, CaO, ,Ca,(,OH,) ,2,, MgO + CaO, MgSO 4 + NaOH, and MgCO 3 + NaOH. In almost all cases the results ,were, unsatisfactory; boron removal varied between 20 and 50% [ 14 ].

Acid mine drainage treatment using by-products from ...
Acid mine drainage treatment using by-products from ...

The aim of this research was to investigate whether by-products from quicklime manufacturing could be used instead of commercial quicklime (CaO) or hydrated lime (Ca(OH)2), which are traditionally used as, neutralization chemicals in acid mine drainage treatment.

Calcium hydroxide (Ca(OH)2) reaction products ...
Calcium hydroxide (Ca(OH)2) reaction products ...

The ,Waste, Framework Directive aims to protect the environment and human health from the generation and management of ,waste, ... The revised Drinking ,Water, Directive aims to protect citizens and the environment from the harmful effects of contaminated drinking ,water, ... (,Ca,(,OH,),2,), reaction products with magnesium hydroxide and silicic ,acid, ...

Effective acid and metals treatment in tailings dams ...
Effective acid and metals treatment in tailings dams ...

An alternative to ViroMine Technology in reducing acid and removing metal contamination in mine dam wastewater is the use of either calcium carbonate (CaCO 3) or, calcium hydroxide, (Ca(OH) 2). A comparison between the, uses, of lime and Virotec’s reagents can be summarised as follows:

Calcium hydroxide (Ca(OH)2) reaction products ...
Calcium hydroxide (Ca(OH)2) reaction products ...

Calcium hydroxide (,Ca,(,OH,),2,), reaction products with magnesium hydroxide and silicic ,acid, (H4SiO4) zirconium salt (1:1)

Using Process Simulation to Predict Wastewater Treatment ...
Using Process Simulation to Predict Wastewater Treatment ...

examines the outcome of four waste treatment applications designed on the computer using real-solution aqueous process simulation. First, two typical, fluoride waste water, streams were treated with either Ca(OH)2 or CaCl2. Process simulation was used to predict the chemical addition rate, and the clean water composition following CaF2 removal.

AVS in waste water treatment - avs.globecore.com
AVS in waste water treatment - avs.globecore.com

11/2/2016, · Efficiency of ,waste water, purification of heavy metals: 1 – mechanical agitator reactor (consumption of ,Ca,(,OH,),2, – 115-120% of the stoichiometric amount); ,2, – AVS (consumption of ,Ca,(,OH,),2, –92% of the stoichiometric amount)

Acid mine drainage treatment using by-products from ...
Acid mine drainage treatment using by-products from ...

The aim of this research was to investigate whether by-products from quicklime manufacturing could be used instead of commercial quicklime (CaO) or hydrated lime (Ca(OH)2), which are traditionally used as neutralization chemicals in acid mine drainage treatment. Four by-products were studied and the results were compared with quicklime and hydrated ...

Your Friday Dose of Woo: Thanks Paulette Williams! Thanks ...
Your Friday Dose of Woo: Thanks Paulette Williams! Thanks ...

If strong ,acidic water, of pH 2.5 (a strong disinfectant with many important uses) is selected, strong Kangen ,water, of pH 11.5 (a powerful solvent used mainly for cleaning) will also be produced.

ACID- AND BASE-CATALIZED HYDROLYSES OF CORN STALK
ACID- AND BASE-CATALIZED HYDROLYSES OF CORN STALK

Acetic ,acid, was ,used, as a representative organic ,acid,, and ,Ca,(,OH,),2, and NaOH ,were used, as bases. Finally, pure ,water, was just ,used, as an extractive agent. 5 g of raw material and with the solution of the ,used, reagents ,were, placed in a closed bottle for autoclaving of 250 mL volume. The pH of all solutions, except ,water,, ,were, adjusted to a pH of around 4 for acids and 8 for bases. Table 1 shows the different experiments that ,were, …

Method for treating heavy metal containing waste water by ...
Method for treating heavy metal containing waste water by ...

A heavy metal containing ,waste water, (low concentration and high concentration) is maintained at pH=8-11.5 by adding NH 4 ,OH,, ,Ca,(,OH,) ,2, and NAOH. Then the acornic ,acid, is added into the ,waste water,, and then, ,Ca, + + ions singly or together with other divalent cations are added by 50 ppm.

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