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What does litmus change to indicate that the wastewater is acidic

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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What does litmus change to indicate that the wastewater is acidic
Short- and Long-Term Performance of the Thin-Film ...
Short- and Long-Term Performance of the Thin-Film ...

Overall, the newly developed FO membranes can recover ∼80% of the water at a ,high, average water flux of 10.4 LMH using 1 M NaCl as draw solution from a 500 ppm oil–water emulsion containing a low salt ,concentration, of 0.5 g/L. This, in turn, demonstrates the potential of the FO membranes for ,oily wastewater, reclamation.

Polyacrylamide for chemical fiber
Polyacrylamide for chemical fiber

Chemical fiber wastewater contains high organic matter content, various toxic substances, high B/C and unstable, between 1000-10000mg/1, wastewater treatment has poor biodegradability, wastewater is acidic or destructive, and contains aldehydes and cyanide Toxic substances such as benzene, benzene, etc., are likely to have toxic effects on microorganisms.

DECOLORIZATION OF CONCENTRATED RHAMNOLIPID …
DECOLORIZATION OF CONCENTRATED RHAMNOLIPID …

What is claimed is: 1. An organic solvent-free process for obtaining a neutralized composition comprising one or more rhamnolipids (RLs) comprising: (a) providing an aqueous medium comprising at least one rhamnolipid; (b) treating said medium provided with acid to obtain an ,acidic, medium comprising a solid, liquid and ,oily, phase; (c) removing at least the liquid phase from said ,acidic, medium ...

ISSN 2250-3153 Palm Oil Mill Effluent (POME) Treatment ...
ISSN 2250-3153 Palm Oil Mill Effluent (POME) Treatment ...

as POME. This wastewater is a viscous, brownish liquid containing about 95–96% water, 0.6–0.7% oil and 4–5% total solids (including 2–4% SS, mainly debris from the fruit). It is acidic (pH 4–5), hot (80–90 0C), nontoxic (no chemicals are added during oil extraction), has high organic content (COD

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