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Harm 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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Harm of fracturing flowback fluid
Tannery wastewater treatment using two-stage anaerobic ...
Tannery wastewater treatment using two-stage anaerobic ...

Tannery wastewater, samples were collected from Modjo ,Tannery,, central Ethiopia using different size plastic bags every seven days for three months (12 days). The samples were collected from three different effluent lines which included the sulfur line; chrome line and general ,wastewater, line and a composite sample was prepared by combining the three stream samples proportional to their …

Impact of Ammonia Nitrogen on COD Removal Efficiency in ...
Impact of Ammonia Nitrogen on COD Removal Efficiency in ...

Wastewater, effluent discharges containing excessive nitrogenous compounds causes eutrophication, depletion of dissolved oxygen, posing toxicity to aquatic species and also affecting suitability for reuse of ,wastewater, (Metcalf & Eddy et al. 2003; Falahati et al. 2018).Various regulatory authorities such as CPCB and MoEF have developed the discharge standard limit for ,ammonia nitrogen, in water bodies as 50 …

A Comparative Study on Removal Efficiency of Sulphide and ...
A Comparative Study on Removal Efficiency of Sulphide and ...

ammonia nitrogen, after 3 hours of reaction. There was no change in ,ammonia nitrogen, amount after the reactions (Dantas et al., 2003). Mn-Cu/Al 2 O 3 heterogeneous catalytic ozonation process for tertiary treatment depicted that the removal efficiency of COD was 29.3% more as compared to ozonation alone after 60 minutes (Huang et al., 2016).

TREATMENT OF TANNERY WASTEWATER BY PRETREATMENT ...
TREATMENT OF TANNERY WASTEWATER BY PRETREATMENT ...

The ,tannery wastewater, is difficult to treat because of its fluctuant quality and volume,high pollution load capacity and its virulence.This project uses pretreatment-coagulation-anaerobic hydrolysis-cyclic activated sludge technology(C-TECH) process to treat ,tannery wastewater,.It is studied the change rule of C-TECH pond aeration time with COD_ Cr ,NH_3-N and DO.The result indicates that it ...

CN104628213A - Processing method of ammonia-containing ...
CN104628213A - Processing method of ammonia-containing ...

The invention discloses a processing method of ,ammonia,-containing ,tannery wastewater,. The processing method comprises following steps: (1) the ,ammonia,-containing ,tannery wastewater, is mixed with an organic reducing agent at a certain ratio, and is heated to 180 DEG C, and the temperature is maintained for 3 to 4h; (2) an obtained mixture is mixed with ferrous sulfate heptahydrate; and an ...

Leaching Behaviors of Chromium(III) and Ammonium-Nitrogen ...
Leaching Behaviors of Chromium(III) and Ammonium-Nitrogen ...

Tannery, sludge usually has high content of trivalent chromium (Cr(III)) and ammonium-,nitrogen, (NH4+-N). It is important to make a critical evaluation of the releasing behaviors of Cr(III) and NH4+-N ,from tannery, sludge before its use on improving soil fertility in agricultural applications. For this purpose, static batch and dynamic leaching experiments with different mathematical models were ...

Tannery wastewater treatment using two-stage anaerobic ...
Tannery wastewater treatment using two-stage anaerobic ...

Tannery wastewater, samples were collected from Modjo ,Tannery,, central Ethiopia using different size plastic bags every seven days for three months (12 days). The samples were collected from three different effluent lines which included the sulfur line; chrome line and general ,wastewater, line and a composite sample was prepared by combining the three stream samples proportional to their …

Physico-chemical characterization of tannery effluent and ...
Physico-chemical characterization of tannery effluent and ...

The concentrations of ,ammonia,-N and total ,nitrogen, along the ,tannery wastewater, channel (drain) ranged from 520.44 to 401.23 and 720.46 to 665.43 mgL-1 respectively (Table 1). Their values differed significantly among sampling sites (p<0.05).

Impact of Ammonia Nitrogen on COD Removal Efficiency in ...
Impact of Ammonia Nitrogen on COD Removal Efficiency in ...

Wastewater, effluent discharges containing excessive nitrogenous compounds causes eutrophication, depletion of dissolved oxygen, posing toxicity to aquatic species and also affecting suitability for reuse of ,wastewater, (Metcalf & Eddy et al. 2003; Falahati et al. 2018).Various regulatory authorities such as CPCB and MoEF have developed the discharge standard limit for ,ammonia nitrogen, in water bodies …

Lime Use in Wastewater Treatment: Design and Cost Data
Lime Use in Wastewater Treatment: Design and Cost Data

The efficiency of ,ammonia, air stripping as a result of high lime treatment depends on the pH of the ,wastewater,. The process requires a high pH to achieve efficient removal of ,ammonia,, because this ,nitrogen, compound is very soluble in water and is highly ionized at pH 7.0.

A Comparative Study on Removal Efficiency of Sulphide and ...
A Comparative Study on Removal Efficiency of Sulphide and ...

ammonia nitrogen, after 3 hours of reaction. There was no change in ,ammonia nitrogen, amount after the reactions (Dantas et al., 2003). Mn-Cu/Al 2 O 3 heterogeneous catalytic ozonation process for tertiary treatment depicted that the removal efficiency of COD was 29.3% more as compared to ozonation alone after 60 minutes (Huang et al., 2016).

Constructed wetland - Wikipedia
Constructed wetland - Wikipedia

A ,constructed wetland, (CW) is an artificial wetland to treat municipal or industrial ,wastewater,, greywater or stormwater runoff. It may also be designed for land reclamation after mining, or as a mitigation step for natural areas lost to land development.Constructed wetlands are engineered systems that use natural functions vegetation, soil, and organisms to treat ,wastewater,.

Physico Chemical Characterization of Tannery Effluent and ...
Physico Chemical Characterization of Tannery Effluent and ...

This indicated that the tannery wastewater is polluting the downstream site of the river. Ammonia-N and Total Nitrogen: The concentrations of ammonia-N and total nitrogen along the tannery wastewater channel (drain) ranged from 520.44 to 401.23 mg∙L −1 and 720.46 to …

A Concise Review on the Effect of Tannery Waste Water on ...
A Concise Review on the Effect of Tannery Waste Water on ...

of ,ammonia,-N is toxic to aquatic organism and ,nitrogen, ... water unsafe for fishes and other aquatic life ,nitrogen, and phosphorus in ,tannery waste water, encourage algae ... (2003). Characterization of ,tannery wastewater, and assessment of downstream pollution profiles along Modjo river in Ethiopia. Ethiopian J. Biol. Sci. 2(2):157-168.

Leaching Behaviors of Chromium(III) and Ammonium-Nitrogen ...
Leaching Behaviors of Chromium(III) and Ammonium-Nitrogen ...

Tannery, sludge usually has high content of trivalent chromium (Cr(III)) and ammonium-,nitrogen, (NH4+-N). It is important to make a critical evaluation of the releasing behaviors of Cr(III) and NH4+-N ,from tannery, sludge before its use on improving soil fertility in agricultural applications. For this purpose, static batch and dynamic leaching experiments with different mathematical models were ...

Anammox - Wikipedia
Anammox - Wikipedia

One is a ,tannery,, the other a potato processing plant. [citation needed] Advantages. Conventional ,nitrogen, removal from ammonium-rich ,wastewater, is accomplished in two separate steps: nitrification, which is mediated by aerobic ,ammonia,- and nitrite-oxidizing bacteria and denitrification carried out by denitrifiers, which reduce nitrate to N

TREATMENT OF TANNERY WASTEWATER BY PRETREATMENT ...
TREATMENT OF TANNERY WASTEWATER BY PRETREATMENT ...

The ,tannery wastewater, is difficult to treat because of its fluctuant quality and volume,high pollution load capacity and its virulence.This project uses pretreatment-coagulation-anaerobic hydrolysis-cyclic activated sludge technology(C-TECH) process to treat ,tannery wastewater,.It is studied the change rule of C-TECH pond aeration time with COD_ Cr ,NH_3-N and DO.The result indicates that it ...

Quantification of Pollution Discharges from Tannery ...
Quantification of Pollution Discharges from Tannery ...

Wastewater from tanneries usually contains high levels of salinity, organic and inorganic matter, dissolved and suspended solids, ammonia, organic nitrogen and specific pollutants (sulphide, chromium and other toxic metal salt residues). Wastewater characterization is an integral part of treatment and management strategies for industrial effluents.

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