Treatment system and treatment method of oil refinery alkaline residue wastewater
A technology of alkali slag wastewater and treatment system, which is applied in natural water body treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of high cost of treatment technology, and achieve enhanced growth adaptability and cost The effect of reducing and eliminating hazards
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[0036] Example 1
[0037] Such as Figure 1-6 As shown, the internal circulation micro-gradient biological oxidation combined treatment system used to treat the alkali residue wastewater of the refinery consists of a spent alkali storage tank, a denitrification reactor, two internal circulation aerobic bioreactors, a nitrification reactor, and an ozone catalytic reactor And nitration reactor. The waste alkali storage tank is connected with the denitrification reactor, and the connecting pipeline between the waste alkali storage tank and the denitrification reactor is equipped with an alkali residue metering pump, a dilution water metering pump, an acid metering pump, a nutrient salt metering pump and a nitrification liquid return pump . Two internal circulation aerobic bioreactors are arranged in parallel, the denitrification reactor is connected to the internal circulation aerobic bioreactor through pipelines, the internal circulation aerobic bioreactor is connected to the aer...
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[0043] Example 2
[0044] The treatment method of the internal circulation micro-gradient biological oxidation combined treatment system of embodiment 1 of the present invention is as follows:
[0045] The spent alkali storage tank is connected to the denitrification reactor through an alkali residue metering pump, and the connecting pipeline is provided with a dilution water metering pump, an acid metering pump, a nutrient salt metering pump and a nitrification liquid return pump. The waste lye is measured and mixed with dilution water in a certain proportion. The mixed sewage is mixed and diluted again with the reflux water from the nitrification reactor at the end of the device. At this time, the COD of the total mixed sewage is controlled within the range of design requirements (usually COD≈3000mg / L or so). Add concentrated sulfuric acid in the pipeline to neutralize, control the pH of the total mixed sewage in the range of 8.5 to 10.5, and add sodium dihydrogen phosphate sol...
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