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Treatment of acid wastewater by neutralization filter bed

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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Treatment of acid wastewater by neutralization filter bed
Refined soybean oil wastewater treatment and its ...
Refined soybean oil wastewater treatment and its ...

1/11/2018, · The release of refined soybean oil ,wastewater, (RSOW) with a high chemical oxygen demand (COD) and oil content burdens the environment. The conversion of RSOW into lipids by oleaginous yeasts may be a good way to turn this waste into usable products. ,The oleaginous yeast Trichosporon fermentans, was used for treating the RSOW without sterilization, dilution, or nutrient supplementation.

ACID MINE DRAINAGE TREATMENT AND METAL REMOVAL …
ACID MINE DRAINAGE TREATMENT AND METAL REMOVAL …

H 2 S gas acts as a weak ,acid, and, when ,the pH, is around 6.,5,, it releases protons to form HS-. In an acidic solution, sulfide volatilization is expected to increase, consequently producing a decrease in the metallic sulfide formation potential. At ,pH, around 6.,5,, 50% of the sulfide species are present in the form of HS-(Kaksonen and Puhakka, 2007).

7.11 Decolorization and Degradation of Melanoidins in ...
7.11 Decolorization and Degradation of Melanoidins in ...

In our experiments, ,wastewater, with the same ,value, in chromaticity (4000) or TOC (about 300 mg/1) ... that of ,wastewater, irradiated by EB ,gradually, decreased to 14 kGy and was almost constant above the dose. Experiment on samples with the same ,value, of ... Fig. ,5 Changes, of organic ,acid, formation and ,pH, in dialyzed ,wastewater, by gamma ray ...

Effect of ph and [H.sub.2][O.sub.2] dosage on the ...
Effect of ph and [H.sub.2][O.sub.2] dosage on the ...

1/11/2014, · Complete discoloration (100%) was observed at an initial ,pH, of 3, ,5,, 7 and 9, except 94.0% removal at ,pH, 11. The effect of initial ,pH, on the COD removal clearly confirmed that UV/[H.sub.2][O.sub.2] is ,pH, dependent. Generally, the lowest removal was observed when ,the pH value, …

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 ...

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 ...

Disposal of high-arsenic waste acid by the stepwise ...
Disposal of high-arsenic waste acid by the stepwise ...

The arsenic concentrations for the waste ,acid, usually range from 0.,5, to 30 g L −1 with sulfuric ,acid, concentrations ranged from 10 to 200 g L −1, which is the most crucial arsenic waste because of its high arsenic mobility and toxicity. 3–,5, Even a slight leakage ,of high-arsenic waste acid, will cause serious arsenic pollution as well as widely safety and environmental concern. 6,7

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.

ACID MINE DRAINAGE TREATMENT AND METAL REMOVAL …
ACID MINE DRAINAGE TREATMENT AND METAL REMOVAL …

H 2 S gas acts as a weak ,acid, and, when ,the pH, is around 6.,5,, it releases protons to form HS-. In an acidic solution, sulfide volatilization is expected to increase, consequently producing a decrease in the metallic sulfide formation potential. At ,pH, around 6.,5,, 50% of the sulfide species are present in the form of HS-(Kaksonen and Puhakka, 2007).

Effect of acid treatment on the removal of heavy metals ...
Effect of acid treatment on the removal of heavy metals ...

to ,pH, 2 with nitric ,acid,) was added to the cool, moist residue. Step 4. ,Acid, soluble (total residual cations). A solution containing 7.,5, mL concen-trated HNO 3 and ,5, mL HClO 4 was added to the residue from step 3. The digestion was accom-plished in 2 h at 100°C in a water bath. After cooling, 1.,5, mL concentrated HNO 3 and double

Effect of ph and [H.sub.2][O.sub.2] dosage on the ...
Effect of ph and [H.sub.2][O.sub.2] dosage on the ...

1/11/2014, · Complete discoloration (100%) was observed at an initial ,pH, of 3, ,5,, 7 and 9, except 94.0% removal at ,pH, 11. The effect of initial ,pH, on the COD removal clearly confirmed that UV/[H.sub.2][O.sub.2] is ,pH, dependent. Generally, the lowest removal was observed when ,the pH value, …

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).

General Characteristics and Treatment Possibilities of ...
General Characteristics and Treatment Possibilities of ...

In cheese manufacturing, sweet whey is slightly acidic, with ,pH,=,5,.9–6.6, while mineral ,acid, coagulation gives an acidic whey with ,pH,=4.3–4.6 (6, 27). The sharp increase in the short-term ,pH, of the total flow of up to 10–10.,5, is attributable to the discharge of alkaline cleaning solutions.

A Review on Textile Wastewater Characterization in Bangladesh
A Review on Textile Wastewater Characterization in Bangladesh

1/5/2015, · ,pH, is a measure of the negative logarithm of hydrogen ion concentration in the ,wastewater, and gives an indication of how ,acid, or alkaline the ,wastewater, is. This parameter is important because aquatic life such as most fish can only survive in a narrow ,pH, range between roughly ,pH, 6-9.

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. The …

General Characteristics and Treatment Possibilities of ...
General Characteristics and Treatment Possibilities of ...

In cheese manufacturing, sweet whey is slightly acidic, with ,pH,=,5,.9–6.6, while mineral ,acid, coagulation gives an acidic whey with ,pH,=4.3–4.6 (6, 27). The sharp increase in the short-term ,pH, of the total flow of up to 10–10.,5, is attributable to the discharge of alkaline cleaning solutions.

Refined soybean oil wastewater treatment and its ...
Refined soybean oil wastewater treatment and its ...

1/11/2018, · The release of refined soybean oil ,wastewater, (RSOW) with a high chemical oxygen demand (COD) and oil content burdens the environment. The conversion of RSOW into lipids by oleaginous yeasts may be a good way to turn this waste into usable products. ,The oleaginous yeast Trichosporon fermentans, was used for treating the RSOW without sterilization, dilution, or nutrient supplementation.

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,.

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