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Treatment standard of fracturing flowback fluid

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 standard of fracturing flowback fluid
Furfural wastewater pretreatment of corn stalk for whole ...
Furfural wastewater pretreatment of corn stalk for whole ...

15/7/2019, · ,Furfural wastewater (,FW) is an acidic crop stalk depolymerization wastewater during the furfural production (Yang et al., 2018), which is highly acidic (sulfuric acid and acetic acid). One ton of furfural can lead to the production of about 20–30 tons of furfural wastewater, and there are >200 factories producing FW of approximately 4–6 million tons annually in China ( Xing et al., 2016 ).

Technical scheme of industrial wastewater treatment ...
Technical scheme of industrial wastewater treatment ...

Use acid and alkali resistant inorganic membrane to treat alkaline papermaking black liquor, no need to adjust the pH value, use membranes with different pore diameters to recover useful components such as cellulose and lignin, and the treated water can be used to cook pulp and realize closed circuit of papermaking ,wastewater, Circulation: The mud-film mixing process is used to treat tannery ...

Seven Basic Principles Of Industrial Wastewater Treatment ...
Seven Basic Principles Of Industrial Wastewater Treatment ...

As industrial ,wastewater, has great impact on the environment and is difficult to treat, some basic principles should be followed in production and treatment. These are summarized as follows: 1. The non-toxic production process should be selected as the first priority to replace or reform the backward production process, and the production of toxic and harmful ,wastewater, should be eliminated or ...

Missouri Department of Natural Resources
Missouri Department of Natural Resources

Ammonia,, present either in the waste or liberated from ,nitrogen,-,containing, organic matter, is not oxidized in the absence of significant ... Total ,ammonia, in ,wastewater, treatment systems consists of NH 3-plus NH 4 +. If pH of the solution increases either naturally or by addition of a ... If the water in a stream is too ,acidic, or ...

Critical review of advanced oxidation processes in organic ...
Critical review of advanced oxidation processes in organic ...

Comparing with traditional ,wastewater, treatment method, photocatalysis has the advantages of high efficiency and recycling in the advanced treatment of industrial ,wastewater, (EL-Mekkawi et al., 2020), pharmaceutical ,wastewater, (Che et al., 2018), dyeing ,wastewater, (Zangeneh et al., 2015), and other ,wastewater containing, a variety of refractory substances (Hao et al., 2019).

US5240561A - Acid-to-alkaline papermaking process - Google ...
US5240561A - Acid-to-alkaline papermaking process - Google ...

A fundamentally new papermaking process for the manufacture of paper, board and other wet-laid products on a paper machine under conditions ranging from ,acidic, to alkaline from aqueous furnishes treated with in-situ-synthesized complex functional microgels.

Biological and Chemical Wastewater Treatment Processes ...
Biological and Chemical Wastewater Treatment Processes ...

2/12/2014, · Strong organic wastewaters ,containing, large amounts of biodegradable materials are discharged mainly by agricultural and ... were designed for removal of BOD 5 or ,ammonia nitrogen, (NH 3-N), or both, from ... Neutralization is controlling the pH of the ,wastewater, whether it is ,acidic or alkaline, to keep the pH ...

Dissolved organic nitrogen in wastewater treatment ...
Dissolved organic nitrogen in wastewater treatment ...

15/3/2021, · In a lab-scale aerobic bioreactor treating synthetic organic ,wastewater, without DON in the influent (,ammonia, chloride as the sole ,nitrogen, source), up to 3.45 mg N/L DON was detected in the effluent, fully attributable to microbial production (He et al., 2018). mDON mainly consists of proteins, enzymes, nucleic acids, amino acids and fulvic acid-like substances with relatively high ...

Mini-Encyclopedia of Papermaking Wet-End Chemistry
Mini-Encyclopedia of Papermaking Wet-End Chemistry

PAC products of low (0 to 17%) and medium (17 to 50%) are commonly used in papermaking applications, whereas PAC products of higher basicity are useful for water and wastewater treatment. Strategies for Use : Because PAC is less, acidic, than alum there is less danger of shocking the system with a pH change at the point of addition.

Acid rain - Wikipedia
Acid rain - Wikipedia

Acid rain, is a rain or any other form of precipitation that is unusually ,acidic,, meaning that it has elevated levels of hydrogen ions (low pH).It can have harmful effects on plants, aquatic animals, and infrastructure. ,Acid rain, is caused by emissions of sulphur dioxide and ,nitrogen, oxide, which react with the water molecules in the atmosphere to produce acids.

Acid-to-alkaline papermaking process - Industrial Progress ...
Acid-to-alkaline papermaking process - Industrial Progress ...

The most pronounced drawbacks of the acidic papermaking process traditionally have been manifested in the, low mechanical strength, and, poor aging characteristic, of, paper, products, along with severe adverse environmental side effects.

Mini-Encyclopedia of Papermaking Wet-End Chemistry
Mini-Encyclopedia of Papermaking Wet-End Chemistry

The most common chemicals for neutralization are alum (especially in the case of ,acidic, papermaking), polyethyleneimine of polyaluminum chloride (PEI or PAC, for ,acidic, or neutral systems), or polyamines or poly-DADMAC (for all pH ranges, but especially alkaline pH).

Advanced Oxidation Processes (AOPs) in Wastewater ...
Advanced Oxidation Processes (AOPs) in Wastewater ...

18/9/2015, · ,Advanced oxidation, processes (AOPs) were first proposed in the 1980s for drinking water treatment and later were widely studied for treatment of different wastewaters. During the AOP treatment of ,wastewater,, hydroxyl radicals (OH·) or sulfate radicals (SO4 ·−) are generated in sufficient quantity to remove refractory organic matters, traceable organic contaminants, or certain inorganic ...

Industrial Wastewater Treatment | IWA Publishing
Industrial Wastewater Treatment | IWA Publishing

Industrial wastewater treatment, covers the mechanisms and processes used to treat waters that have been contaminated in some way by anthropogenic industrial or commercial activities prior to its release into the environment or its re-use. Most industries produce some wet waste although recent trends in the developed world have been to minimise such production or recycle such

Treatment Technologies for Organic Wastewater | IntechOpen
Treatment Technologies for Organic Wastewater | IntechOpen

17/11/2011, · The COD value is always measured by the ,acidic, potassium permanganate method and potessium dichromate method, and could reflect the pollution degree of reducing matter in water, including ,ammonia, and reducing sulfide, so in ,wastewater, with high quantity of reducing matter, the COD value will overestimate the organic pollutants in the water.

Ammonia & Ammonium - Water Quality Parameter Overview and ...
Ammonia & Ammonium - Water Quality Parameter Overview and ...

During ,wastewater, treatment, ,ammonia, levels can reach extremely high concentrations as a result of bacterial action. ,Ammonia, is first converted to nitrate through the nitrification process so that it can be reduced to atmospheric ,nitrogen, (N 2) by denitrification.Learn more about municipal ,wastewater, treatment.At high concentrations and pH, ,ammonia, can be toxic to sludge digestion microbes.

What are the differences between NH3N and NH4N? How do ...
What are the differences between NH3N and NH4N? How do ...

NH3-N (or simply ,ammonia,, NH3) and NH4-N are two different form of inorganic ,nitrogen,. The one is the unionized form and the latter is the ionized form and very toxic.

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