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Water Cooling Chiller Machine

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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Water Cooling Chiller Machine
ects of Copper and pH on the Growth and Physiology of ...
ects of Copper and pH on the Growth and Physiology of ...

substantially [3]. Additionally, ,the pH, of the water systems is lowered (,pH, 3–,5,) resulting in ,acid, mine drainage (AMD) [4,,5,]. A range of studies [3,6,7] have determined the level of Cu directly from industrial and ,acid, mine run-o is around 10 to 80 times higher (up to 160 mg/L) than control level, indicating an urgent need for remediation.

CO2 introduced the coagulation-flocculation of oil ...
CO2 introduced the coagulation-flocculation of oil ...

Before titration, the ,value, of ,pH, decreased ,to 5,.76. The concentration of Ca 2+ was as high as 6,412.8 mg·L −1 in the raw ,wastewater,. After adding 0.55 mL of NaOH dropwise, the area of the titration curve with a ,pH, less than 7 was termed the neutralization reaction zone.

Effect of influent pH on hydrolytic acidification ...
Effect of influent pH on hydrolytic acidification ...

ORP increased ,gradually, from −262 mV to 83 mV with influent ,pH, decreasing from 8.0 to 4.0, possibly due to the inhibition of microorganisms, and affecting the metabolism of microorganisms. A similar result was found previously by Zhu et al., who reported that the ORP increased from −420 mV to −380 mV with ,the pH, decreasing from ,5, to 4.6.

Enhanced Bio-hydrogen Production from Protein Wastewater ...
Enhanced Bio-hydrogen Production from Protein Wastewater ...

5/2/2014, · Enhanced bio-,hydrogen production from protein wastewater by altering protein structure, and amino acids acidification type via ,pH, control was investigated. …

Polyacrylamide for steel wastewater
Polyacrylamide for steel wastewater

Mine ,wastewater, is sulfuric ,acid, type ,wastewater,, with a general ,pH, of 1.6. Such a low sulfuric ,acid, content obviously has no recovery ,value,, so neutralization is often used. Method. The treatment of mine ,acid wastewater, generally adopts the lime neutralization method. Iron and steel plant ,wastewater, treatment uses anionic polyacrylamide as a flocculant to treat ,wastewater, produced in steel plants.

(PDF) Removal of Formic Acid from Wastewater using Three ...
(PDF) Removal of Formic Acid from Wastewater using Three ...

We determined that the optimal operation conditions for the reactor included a residence time of ,5, min, a current density of 40 mA cm À2 , and an initial ,pH, of ,5,. Under these conditions, we ...

Effects of pH and Oxygen and Ammonium Concentrations on ...
Effects of pH and Oxygen and Ammonium Concentrations on ...

The pH, range for growth of pure cultures of ammonia oxidizers is ,5,.8 to 8.,5,, and ,the pH, range for growth of nitrite oxidizers is 6.,5, to 8.,5, . Nitrification was inhibited at ,pH, values below ,5,.8 in our preliminary experiments performed with an enriched culture of nitrifiers obtained from ,wastewater,.

CO2 introduced the coagulation-flocculation of oil ...
CO2 introduced the coagulation-flocculation of oil ...

Before titration, the ,value, of ,pH, decreased ,to 5,.76. The concentration of Ca 2+ was as high as 6,412.8 mg·L −1 in the raw ,wastewater,. After adding 0.55 mL of NaOH dropwise, the area of the titration curve with a ,pH, less than 7 was termed the neutralization reaction zone.

Chromium removal from industrial wastewater using ...
Chromium removal from industrial wastewater using ...

22/8/2018, · In order to study the possibility of repeated use of Cu-S·PPP-SH, the efficiency of chromium removal was also tested using hexavalent chromium-electroplating ,wastewater, and trivalent chromium-tanning ,wastewater,. 0.,5, g Cu-S·PPP-SH was added to a conical flask containing 100mL of electroplating ,wastewater, or tanning ,wastewater, sample and shaken at 25°C for 90 min. Adjust ,the pH, of the ...

PETROCHEMICAL WASTEWATER AND ITS TREATMENT
PETROCHEMICAL WASTEWATER AND ITS TREATMENT

solution, its range is 0-14, the solution with ,pH value, of 7 is neutral, below 7 is ,acid,, above 7 is alkaline. Because ,the pH value, can effectively represent the chemical and biochemical characteristics of the so-lution, many emission standards have specified the range of ,pH value,. Most organisms can only live normally when ,the pH, is close to neutral, and beyond a certain range (for example, ,pH, = 3) will cause …

Efficient Synthesis of α-FeOOH from Pickling Wastewater in ...
Efficient Synthesis of α-FeOOH from Pickling Wastewater in ...

adjust its ferrous concentration to 0.5 mol/L. The pH of the purified pickling water is around 2−3; alkali was added to adjust the initial pH to 5. During the reaction process, no alkali was added to observe the, pH value, of the solution, changes, over time. It can be seen from Figure 2 that the pH of solution

Acidogenesis of dairy wastewater at various pH levels ...
Acidogenesis of dairy wastewater at various pH levels ...

The optimum, pH, for, acidogenesis with, distillery stillage ranges from 5.5 to 6.5, whereas a, pH of, 5.0 or less favors the production of alcohol, and a, pH of, 6.5 or higher favors biogas (methane ...

In vivo and in vitro efficient textile wastewater ...
In vivo and in vitro efficient textile wastewater ...

Fig. 5c shows the ,changes, of ,pH, values before and after adjustment for the three ,acid, dyes. Two dashed lines divide the chart into three parts: unadjusted ,pH, (left), ,pH, adjusted to 3.,5, (middle) and ,pH, adjusted to 2.0 (right). Before adjusting ,the pH value,, a slight decrease of ,pH, was observed from 0 to 12 h (left).

An efficient process for wastewater treatment to mitigate ...
An efficient process for wastewater treatment to mitigate ...

27/2/2015, · In the O/A/O/EI reactor, ,pH gradually, increased from 8.0 to 8.6 during the initial 60 min of first oxic phase and then decreased slightly during the remaining of this phase.

Effect of influent pH on hydrolytic acidification ...
Effect of influent pH on hydrolytic acidification ...

ORP increased gradually from −262 mV to 83 mV with influent pH decreasing from 8.0 to 4.0, possibly due to the inhibition of microorganisms, and affecting the metabolism of microorganisms. A similar result was found previously by Zhu et al., who reported that the ORP increased from −420 mV to −380 mV with the pH decreasing from 5 to 4.6.

ects of Copper and pH on the Growth and Physiology of ...
ects of Copper and pH on the Growth and Physiology of ...

substantially [3]. Additionally, ,the pH, of the water systems is lowered (,pH, 3–,5,) resulting in ,acid, mine drainage (AMD) [4,,5,]. A range of studies [3,6,7] have determined the level of Cu directly from industrial and ,acid, mine run-o is around 10 to 80 times higher (up to 160 mg/L) than control level, indicating an urgent need for remediation.

An efficient process for wastewater treatment to mitigate ...
An efficient process for wastewater treatment to mitigate ...

In the O/A/O/EI reactor, ,pH gradually, increased from 8.0 to 8.6 during the initial 60 min of first oxic phase and then decreased slightly during the remaining of this phase.

Toward Understanding pH - Microscopes | pH Meters
Toward Understanding pH - Microscopes | pH Meters

This color change is not at a fixed ,pH,, but rather, it occurs ,gradually, over a range of ,pH, values. This range is termed the color change interval. Each ,pH, indicator is defined by a useful ,pH, range. For example Phenolphthalein ,changes, from colorless at 8.0 to pink at 10.0. And Bromthymol Blue has a useful range from 6.0 (yellow) to 7.6 (blue).

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