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Acid wastewater from sulfuric acid plant

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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Acid wastewater from sulfuric acid plant
Advances in heavy metal removal by sulfate-reducing ...
Advances in heavy metal removal by sulfate-reducing ...

Therefore, pH control greatly affects heavy metal removal in the SRB process. For the ,treatment of acid mine wastewater, by an anaerobic packed-bed reactor, the pH of influent water is maintained at 7 by adding alkaline substances. Before the enrichment of SRB, the precipitation of metal is caused by the added alkaline substances.

Kinetics of bacterial sulfate reduction in an activated ...
Kinetics of bacterial sulfate reduction in an activated ...

The kinetics of sulfate reduction and cell densities of sulfate-reducing bacteria (SRB) were determined in activated sludge at Aalborg East wastewater treatment plant, a modern 100 000 person equivalent plant, where SRB are subjected to alternating cycles of oxic and anoxic conditions.

Long-term performance and microbial community analysis of ...
Long-term performance and microbial community analysis of ...

Sulfate,-,reducing, bioreactors have been shown to be suitable systems to remediate these types of ,wastewater, (Boonstra et al. 1999). These bioreactors utilize the sulfidogenic activity of ,sulfate,-,reducing bacteria, (SRB) to simultaneously remove ,sulfate, and metals in the form of …

Mine drainage: Remediation technology and resource ...
Mine drainage: Remediation technology and resource ...

Commercial chitin and shrimp shell waste were evaluated as substrates for sulfate‐reducing bacteria (SRB) to treat AMD‐impacted water in an anaerobic reactor (Rodrigues, Nunez‐Gomez, Silveira, Lapolli, & Lobo‐Recio, 2019). It was found that the shrimp shell waste had …

US5645730A - Acid wastewater treatement - Google Patents
US5645730A - Acid wastewater treatement - Google Patents

A process for treating acid wastewater containing heavy metals has been invented, the process including adding fly ash to the acid wastewater to reduce heavy metals content of …

Long-term performance and microbial community analysis of ...
Long-term performance and microbial community analysis of ...

Sulfate-reducing bioreactors have been shown to be suitable systems to remediate these types of wastewater (Boonstra et al. 1999). These bioreactors utilize the sulfidogenic activity of sulfate-reducing bacteria (SRB) to simultaneously remove sulfate and metals in the form of metal sulfides (Muyzer and Stams 2008).

Review on biological wastewater treatment and resources ...
Review on biological wastewater treatment and resources ...

Anaerobic biological ,treatment of acid mine, drainage from abandoned mines using SRB has shown nearly 99.2% effective removal of copper, zinc, and nickel (Sierra-Alvarez et al. 2006). The use of suspended biological methods for bioremediation of ,wastewater, and resources recovery is an eco-friendly and cost-efficient way.

Sulfate reducing processes at extreme salinity and temperature
Sulfate reducing processes at extreme salinity and temperature

The presence of high sulfate concentrations in specific wastewaters restricts the application of the anaerobic treatment technology, due to the production of the toxic, corrosive and odorous hydrogen sulfide (H2S). The H2S formation results from the proliferation of sulfate reducing bacteria (SRB) in anaerobic bioreactors, where they compete

Development and Status of the Treatment Technology for ...
Development and Status of the Treatment Technology for ...

The summarized ,treatment, technologies for ,acid mine, drainage mainly include neutralization, sulfidization, constructed wetland method, adsorption method, microbiological method, ion exchange method, membrane technology, and microbial fuel cell technology. Also, the primary technology of ,treatment, for ,acid mine, drainage is systematically compared ...

(PDF) Acid Mine Drainage (AMD): causes treatment and case ...
(PDF) Acid Mine Drainage (AMD): causes treatment and case ...

Naturally-occurring ,bacteria, can ac- celerate AMD production by assisting in the breakdown The mining of certain minerals, including gold, of sulfide minerals. copper, and nickel, is associated with ,acid, drainage Also referred to as ,acid, rock drainage (ARD), AMD problems that can cause long-term impairment to emanating from ,mine, waste rock, tailings, and ,mine, waterways and biodiversity.

2002 Progress Report: Metals Removal by Constructed Wetlands
2002 Progress Report: Metals Removal by Constructed Wetlands

Quantification is difficult because the sulfide form is not delineated by the Tessier sequential extraction test, and SEM is not quantitative. The presence of ,sulfate,-,reducing bacteria, and hydrogen sulfide in the wetlands is a strong indication that metal sulfides will be formed, given their low Ksp values (such as 2 x 10-15 for PbS).

Removal of Sulphate and Manganese on Synthetic Wastewater ...
Removal of Sulphate and Manganese on Synthetic Wastewater ...

The present research was conducted to investigate sulphate and manganese removal from synthetic wastewater. The continuous laboratory scale of down-flow fluidized-bed reactor (DFBR) using sulphate reducing bacteria (SRB) consortium and Indonesian natural zeolite as …

Sulfate-Reducing Bacteria as an Effective Tool for ...
Sulfate-Reducing Bacteria as an Effective Tool for ...

22/8/2018, · Remediation ,by Sulfate,-,Reducing Bacteria,. ,Sulfate,-,reducing bacteria, can be used to remediate ,acid mine, tailings making use of the oxygen and enriched carbon source produced by algae (Hilson and Murck, 2001; Hallberg, 2010). They use ,sulfate, as a terminal electron acceptor with SO 4 2-being converted into H 2 S.

Frontiers | Resource Recovery from Wastewater by ...
Frontiers | Resource Recovery from Wastewater by ...

Limits in resource availability are driving a change in current societal production systems, changing the focus from residues ,treatment,, such as ,wastewater treatment,, toward resource recovery. Biotechnological processes offer an economic and versatile way to concentrate and transform resources from waste/,wastewater, into valuable products, which is a prerequisite for the …

Journal: Water research / Publication Year: 2011 / Source ...
Journal: Water research / Publication Year: 2011 / Source ...

A laboratory-scale, four-stage continuous flow reactor system was constructed to test the viability of high-strength ,acid mine, drainage (AMD) and municipal ,wastewater, (MWW) passive co-,treatment,. The synthetic AMD had pH 2.60 and 1860 mg/L acidity as CaCO₃ equivalent with 46, 0.25, 2, 290, 55, 1.2 and 390 mg/L of Al, As, Cd, Fe, Mn, Pb and Zn, respectively.

Review on biological wastewater treatment and resources ...
Review on biological wastewater treatment and resources ...

Anaerobic biological ,treatment of acid mine, drainage from abandoned mines using SRB has shown nearly 99.2% effective removal of copper, zinc, and nickel (Sierra-Alvarez et al. 2006). The use of suspended biological methods for bioremediation of ,wastewater, and resources recovery is an eco-friendly and cost-efficient way.

Advances in heavy metal removal by sulfate-reducing ...
Advances in heavy metal removal by sulfate-reducing ...

Therefore, pH control greatly affects heavy metal removal in the SRB process. For the ,treatment of acid mine wastewater, by an anaerobic packed-bed reactor, the pH of influent water is maintained at 7 by adding alkaline substances. Before the enrichment of SRB, the precipitation of metal is caused by the added alkaline substances.

Sulfate reduction at pH 4 during the thermophilic (55°C ...
Sulfate reduction at pH 4 during the thermophilic (55°C ...

The lower pH limit for growth of known pure cultures of ,sulfate reducing bacteria, (SRB) is pH 4. 5 Nevertheless, ,sulfate, reduction has been proven to occur at pH ≤ 3 in the acidic sediments of an Argentinean lake influenced by volcanism. 6 ,Sulfate, reduction with saw dust cellulose as the substrate has also been observed in incubations ,of acid mine, drainage accumulated in a dam …

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