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Can the wastewater containing sodium sulfide be recovered by acidic solution

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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Can the wastewater containing sodium sulfide be recovered by acidic solution
EFFLUENT GENERATION BY THE DAIRY INDUSTRY: PREVENTIVE ...
EFFLUENT GENERATION BY THE DAIRY INDUSTRY: PREVENTIVE ...

COD, is not considered critical (Table 1), but high the ,effluent, value on day 13 shows a clear effect on the raw wastewater, which is attributed to the formulated UHT chocolate milk (a brown color in the sample) production wastes. For the dry products, the average ,COD, value was about 2091 mg L-1. The increase in raw wastewater ,COD, on the tenth

Removal of Organic Matter from Wastewater by Activated ...
Removal of Organic Matter from Wastewater by Activated ...

COD can be degraded biologically. Normal range of COD found in activated sludge effluent is 30 to 70 mg/lit. It can be measured by using sealed and heated (i.e., closed reflux) low range (3 to 150 ppm) or high range (20 to 1500 ppm) pre-prepared vials that change color from orange to green based

Airplane Wastewater: characterization and a pre-treatment step
Airplane Wastewater: characterization and a pre-treatment step

(SST in the range of 444 - 4605) due mainly for the presence of toilet paper. The organic load of this effluent, in form of COD, vary in the range of 2, 5 – 1, 89 g/L. This effluent presents a mean biodegradability index (BOD 5 /COD ≈ 0, 42). Due to the presence of human urine this effluent presents large concentration of

Effluent Treatment Plant of Dairy Wastewater A Performance ...
Effluent Treatment Plant of Dairy Wastewater A Performance ...

processed for ,COD, determination after the entire sampling operation was complete. The ,COD, of the ,effluent, varied from 1589 to 1960 mg/l before treatment whereas after physical and biological treatment the values obtained from 185 to 239 mg/l respectively. SVI- sludge volume ,index, for determine sludge concentration in wastewater.

Fully Automated Effluent Treatment System
Fully Automated Effluent Treatment System

An ,effluent, stream with a broad range of constituents ranging from large volume wash-down water to high levels of organic chemicals meant that the existing basic ,Effluent, Treatment System was constantly under pressure unable to to deal with pH fluctuation and excess levels of ,COD, (,Chemical Oxygen Demand,) subsequently causing regular excursions above consent levels.

Reasons for the sudden rise of effluent COD detector ...
Reasons for the sudden rise of effluent COD detector ...

2. Reasons for the increase of ,COD effluent, value in activated sludge treatment process: The sludge ,index, is too high. When the reflux ratio is sufficient, when the water depth in the clear water area is less than 1 meter and the sludge ,index, exceeds 150ml/g, measures must be taken to improve the sludge ,index,.

Wastewater quality indicators - Wikipedia
Wastewater quality indicators - Wikipedia

Coliform index measures the population of an organism commonly found in the intestines of warm-blooded animals as an indicator of the possible presence of other intestinal pathogens.: 875–877. Aquatic toxicology tests are used to provide qualitative and quantitative data on adverse effects on aquatic organisms from a toxicant.

Reasons for the sudden rise of effluent COD detector ...
Reasons for the sudden rise of effluent COD detector ...

2. Reasons for the increase of ,COD effluent, value in activated sludge treatment process: The sludge ,index, is too high. When the reflux ratio is sufficient, when the water depth in the clear water area is less than 1 meter and the sludge ,index, exceeds 150ml/g, measures must be taken to improve the sludge ,index,.

Fully Automated Effluent Treatment System
Fully Automated Effluent Treatment System

An ,effluent, stream with a broad range of constituents ranging from large volume wash-down water to high levels of organic chemicals meant that the existing basic ,Effluent, Treatment System was constantly under pressure unable to to deal with pH fluctuation and excess levels of ,COD, (,Chemical Oxygen Demand,) subsequently causing regular excursions above consent levels.

Global calibration model of UV-Vis spectroscopy for COD ...
Global calibration model of UV-Vis spectroscopy for COD ...

Chemical oxygen demand, (,COD,) is a key indicator of the concentration of reductive contaminants, and is considered to directly reflect the pollution level, and so on-line monitors for ,COD, are indispensable for the regulation of discharges. 5 The conventional ,COD, on-line monitor is based on a method involving oxidization by potassium dichromate; 6 however, the device is very expensive and needs high …

Summary of causes of sudden increase of COD in effluent ...
Summary of causes of sudden increase of COD in effluent ...

To identify its characteristics, COD of effluent should be measured first. The increase of COD and BOD5 in effluent from sewage treatment is mainly caused by granular substances or dissolved compounds. There are many methods to determine the cause. 1. Reasons for the increase of COD effluent value in the activated sludge treatment process

Chemical oxygen demand - Wikipedia
Chemical oxygen demand - Wikipedia

In environmental chemistry, the chemical oxygen demand is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solution. It is commonly expressed in mass of oxygen consumed over volume of solution which in SI units is milligrams per litre. A COD test can be used to easily quantify the amount of organics in water. The most common application of COD is in …

PHYSICO–CHEMICAL CHARACTERISTICS AND WATER QUALITY INDEX …
PHYSICO–CHEMICAL CHARACTERISTICS AND WATER QUALITY INDEX …

higher. The Chemical Oxygen Demand (COD)of the effluent was 240 mg/L. Nirmala Agarwal and Sachan ( 2003 ) reported higher value ( 15000 mg/L) of chemical oxygen demand in sugar industry efflu-ent. The BIS permits only 100 mg/L for the disposal to the environment. The Biological Oxygen Demand value of electroplating industry effluent was 8.08 mg/ L.

Effluent Treatment Plant of Dairy Wastewater A Performance ...
Effluent Treatment Plant of Dairy Wastewater A Performance ...

processed for ,COD, determination after the entire sampling operation was complete. The ,COD, of the ,effluent, varied from 1589 to 1960 mg/l before treatment whereas after physical and biological treatment the values obtained from 185 to 239 mg/l respectively. SVI- sludge volume ,index, for determine sludge concentration in wastewater.

Summary of causes of sudden increase of COD in effluent ...
Summary of causes of sudden increase of COD in effluent ...

To identify its characteristics, ,COD of effluent, should be measured first. The increase of ,COD, and BOD5 in ,effluent, from sewage treatment is mainly caused by granular substances or dissolved compounds. There are many methods to determine the cause. 1. Reasons for the increase of ,COD effluent, value in the activated sludge treatment process

Decolorization and Chemical Oxygen Demand (COD) Reduction ...
Decolorization and Chemical Oxygen Demand (COD) Reduction ...

SIEP ,effluent, had ,chemical oxygen demand, (,COD,) content greater than 10,000 mg L-1, high color (>10,000 PCU) and high salinity (about 35,000 mg L-1). Electrolysis experiments were conducted at different operating currents, and removal efficiencies for color, total suspended solids (TSS) and ,COD, …

Global calibration model of UV-Vis spectroscopy for COD ...
Global calibration model of UV-Vis spectroscopy for COD ...

Chemical oxygen demand, (,COD,) is a key indicator of the concentration of reductive contaminants, and is considered to directly reflect the pollution level, and so on-line monitors for ,COD, are indispensable for the regulation of discharges. 5 The conventional ,COD, on-line monitor is based on a method involving oxidization by potassium dichromate; 6 however, the device is very expensive and needs high …

Wastewater quality indicators - Wikipedia
Wastewater quality indicators - Wikipedia

Coliform index measures the population of an organism commonly found in the intestines of warm-blooded animals as an indicator of the possible presence of other intestinal pathogens. Aquatic toxicology tests are used to provide qualitative and quantitative data on adverse effects on aquatic organisms from a toxicant.

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