Treatment process of antibiotic wastewater

Abstract

The invention discloses a treatment process of antibiotic wastewater. The treatment process comprises the following steps: firstly carrying out coagulating sedimentation pretreatment on wastewater, and adding acidized supernate into a hydrolysis acidification pool; mixing returned sludge, anaerobic effluent and hydrolysis acidification effluent in proportion in a water distribution pool, and simultaneously regulating the pH value; feeding the regulated wastewater into a anaerobic treatment stage, converting most pollutants into water and carbon dioxide, simultaneously producing marsh gas, carrying out gas-solid-liquid separation by virtue of a three-phase separator, collecting marsh gas in a gas chamber, returning the sludge to a reaction region, returning partial supernate to the water distribution pool, and sequentially feeding rest supernate into an aerobic treatment stage and an advanced treatment stage. The antibiotic wastewater treated by virtue of the treatment process can thoroughly reach the emission standard, and the removal rate of various pollutants reaches above 99%; furthermore, facilities are simple and are easy and convenient to operate.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a treatment process for antibiotic wastewater with high ammonia nitrogen and high organic wastewater. Background technique [0002] Chlortetracycline wastewater has complex components, high concentration of organic matter CODcr10000mg / l, high concentration of soluble and colloidal solids, frequent changes in pH, high temperature, color and odor, and high content of suspended solids (SS=2000-3000mg / l l), easy to generate foam, contains refractory substances and inhibitory antibiotics, etc., and belongs to antibiotic refractory wastewater. However, the biodegradability of this type of wastewater is ≧0.3, that is, the B / C ratio is high, and the biodegradability is strong. The most energy-saving and effective treatment method is to use microbial treatment technology. The traditional process is generally anaerobic + aerobic process technology, but due to the impact of h...

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Problems solved by technology

The traditional process is generally anaerobic + aerobic process technology, but due to the impact of high antibiotic residues, high ammonia nitrogen (NH3-N=600-800mg / l), high sulfur (SO42-=2000-3000mg / l) and high chlorine , the ordinary anaerobic process is difficult to play a normal role or even completely ineffective, resulting in the failure of the subsequent aerobic system to operate normally, resulting in high energy consumption, unstable operation, and can not meet the emission standards and requirements at all. The treatment system is often in maintenance or Paralyzed state, causing enterprises to be unable to produce normally or even stop production

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