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Chemical oxygen demand (COD) have been the crucially problematic parameters in refinery wastewater treatment. This study was conducted to investigate the COD removal effectiveness in refinery wastewater with the activated pretreatment petroleum coke (APPC) prepared by combination of chemical activation with KOH solution and physical activation with calcination at lower temperatures. Adsorption experiments...
The effectiveness of coagulation/flocculation/ sedimentation (CFS), carbon adsorption, and CFS+carbon adsorption for advanced treatment of a biologically treated coking plant effluent was studied. The CFS treatment was cost effective for producing an effluent reusable as cooling water (CODCr<;100 mg/L). Carbon adsorption accomplished the same recycling treatment at a higher cost. Both carbon type...
Washing coal usually brings about 0.2m3/t wastewater (in terms of closed circulation) due to transpiration, which provides an effective space for the recycle of coke-plant wastewater. The effluent from phenol-cyanogen wastewater biochemical disposal station is used as complementary water for washing coal, and Closed-Cycling System in coal preparation plant is introduced to make industrial experiment...
Adsorption test for phenol-containing wastewater from a coking plant was carried out using Specially-made activated carbon. The reaction mechanism and influencing factors, such as the dosage of Specially-made activated carbon, pH, temperature and time on decomposition of phenol for the treatment of phenol-containing wastewater by Specially-made activated carbon were mainly studied. The proper conditions...
This paper uses the closed circulatory coal gas of coking plant to replace water vapour of the traditional ammonia stripping method to treat coking wastewater containing ammonia. The removing rate of NH3-N is 99.57% in the intermittent experimentation, the target of NH3-N can reach the national discharging second standard. On the basis of this, by simulating industrialization continuous experimentation,...
Aqueous solubility are key attribute of pollutants. Typical pollutants in coke plant have different aqueous solubility. However, the aqueous solubility of pollutants effect on the biodegradation during the A1-A2-O System is unclear. We compared the biodegradation of typical pollutants-pyridine, 2-methylpyridine, and quinoline with different aqueous solubility in coke plant used as the sole carbon...
The resin adsorption process has been developed to remove phenols from coking wastewater and its technological parameters are optimized. The results show that the ultra-cross linking adsorption resin, NDA-99, is an effective adsorbent to treat the coking waste water when its pH is 4.0 and the absorbing flux is 40 mL/h, and the mono-column wastewater treatment capacity is 300 mL per batch. Under the...
The purpose of this study was to choose a fine chemical to efficiently remove ammonia nitrogen from the ammonia water in AS Process, which provides a new available approach to treat coking wastewater. The experiment adopted "Air Stripping and Adsorption" to remove ammonia nitrogen from the ammonia water, and studied the reaction temperature T, pH, the time of stripping t, the dosage of the...
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