Treatment method for metaaluminate-containing C5 resin wastewater
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A meta-aluminate and treatment method technology, which is applied in water/sewage treatment, natural water treatment, water treatment parameter control, etc., can solve the problems of biochemical system impact, high salinity, high alkalinity, etc., and achieve water quality indicators The effect of reducing, safe disposal method and improving biodegradability
Pending Publication Date: 2021-06-15
SHENYANG UNIV
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The C5 resin wastewater containing metaaluminate contains a large amount of sodium metaaluminate, which has a high alkalinity (pH>13) and high salt content; after the C5 resin wastewater is neutralized with hydrochloric acid, a large amount of Al(OH) is produced. 3 Precipitation and NaCl, etc., a large amount of SS and salt will impact the biochemical system, which is not conducive to the growth and reproduction of microorganisms
The above-mentioned difficulties indicate that the treatment of C5 resin wastewater is very difficult. If these problems cannot be solved well, it will be difficult for C5 resin wastewater to be directly discharged up to the standard
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Embodiment 1
[0029] Taking C5 resin wastewater containing metaaluminate produced by a resin production enterprise in Daqing as the treatment object, the pH value of the waste liquid is 12.5-13.0, the ammonia nitrogen content is 450mg / L, the COD is 2000-3000mg / L, and the petroleum content is 110mg / L, BOD 5 / COD=0.13.
[0030] A treatment method for C5 resin wastewater containing metaaluminate, comprising the following steps:
[0031] Step 1: After mixing the C5 resin wastewater containing metaaluminate with the demulsifier, it enters the oil separation unit for demulsification reaction. The residence time of the oil separation unit is 5h, and the dosage of the demulsifier is 3g / L; the oil on the upper part of the oil separation unit Periodically collected, the lower part of the sewage is pumped into the neutralization unit;
[0032] Step 2: The neutralization unit uses PLC to adjust the pH value of the wastewater online, and uses hydrochloric acid to neutralize the metaaluminate wastewate...
Embodiment 2
[0037]Taking C5 resin wastewater containing metaaluminate produced by a resin production enterprise in Fushun as the treatment object, the pH value of the waste liquid is 12.5-13.5, the ammonia nitrogen content is 430mg / L, the COD is 2500-3200mg / L, and the petroleum content is 120mg / L, BOD 5 / COD=0.14.
[0038] A treatment method for C5 resin wastewater containing metaaluminate, comprising the following steps:
[0039] Step 1: Mix the C5 resin wastewater containing metaaluminate with the demulsifier, and then enter the oil separation unit for demulsification reaction. The residence time of the oil separation unit is 4h, and the dosage of demulsifier is 4g / L; Periodically collected, the lower part of the sewage is pumped into the neutralization unit;
[0040] Step 2: The neutralization unit uses PLC to adjust the pH value of the wastewater online, and uses hydrochloric acid to neutralize the metaaluminate wastewater to neutrality; the neutralization unit has a residence time ...
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Abstract
The invention discloses a treatment method for metaaluminate-containing C5 resin wastewater. The treatment method comprises the following steps: directly feeding the metaaluminate-containing C5 resin wastewater into a demulsification and oil separation unit, feeding the oil-removed wastewater into a neutralization unit, feeding the wastewater into a cyclone separation unit after pH regulation, feeding a supernatant into an electrocatalytic oxidation unit after solid-liquid sedimentation of a cyclone separation device, and discharging effluent obtained after the electrocatalytic oxidation degradation treatment when the effluent reaches the standard; and allowing sludge at the bottom of the cyclone separation unit to enter a sludge dewatering unit, and after solid-liquid separation of the sludge dewatering unit, enabling a filtrate to enter the electrocatalytic oxidation unit, collecting mud cakes, and transporting the mud cakes outwards for disposal, thereby finishing the treatment process of the C5 resin wastewater containing meta-aluminate. The treatment method provided by the invention is economical and efficient, the water quality indexes of SS, ammonia nitrogen, COD and the like of discharged sewage after treatment are remarkably reduced, biodegradability is greatly improved, and finally, the water quality requirements of inlet water of a sewage treatment plant can be met.
Description
technical field [0001] The application relates to a sewage treatment method and device, in particular to a treatment method for metaaluminate-containing C5 resin wastewater, which belongs to the technical field of sewage treatment. Background technique [0002] Petroleum resin production process In the resin polymerization process, AlCl 3 It exists in the form of an organic synthesis catalyst. After the polymerization process, NaOH solution is added to the system to clean the aluminum ions in the polymerization solution. After adding NaOH, aluminum ions exist in the form of metaaluminate when the pH is greater than 10.0. The C5 resin wastewater containing metaaluminate has a high viscosity (600mpa•s, 60°C), which is easy to block pipeline equipment; the resin liquid is a high-molecular organic matter, which is difficult to degrade biochemically; and it forms an emulsified layer in water, making it difficult to separate the two phases. If it enters the biochemical system, t...
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