Treatment method for wastewater with high ammonia nitrogen content

Abstract

The invention provides a treatment method for wastewater with high ammonia nitrogen content. According to the invention, after copper ions in the wastewater with high ammonia nitrogen content are adsorbed, obtained wastewater is converged to enter an adjusting pool; the amount and quality of the wastewater are adjusted in the adjusting pool; adjusted wastewater in the adjusting pool is lifted to amembrane treatment system through a lift pump, and then quantitatively pumped to an anoxic pool through a metering pump; a denitrification site is provided; an aeration tray is arranged in the anoxicpool to avoid sludge from sedimentation; a mixed solution in the anoxic pool automatically flows into MBBR which provides a nitrification-denitrification site; effluent of the MBBR automatically flows into an FMBR membrane pool for solid-liquid separation of a large amount of suspended solids; nitrogen is removed through the following three ways in an FMBR treatment process: 1) nitrification-denitrification, 2) short-range nitrification-denitrification, and 3) anaerobic ammonia oxidation; sludge remaining in the FMBR membrane pool is discharged to a sludge pool; after sludge is treated through a submerged air blower pool, treated sludge is discharged to a comprehensive pool for further treatment; thus, the removal rate of ammonia nitrogen reaches 99% or above, and high treatment efficiency and good effluent water quality are achieved; equipment is compact and occupies small land area; and automatic control is easily realized, and operation management is simple.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a method for treating high ammonia nitrogen wastewater. Background technique [0002] The main source of high-concentration ammonia-nitrogen wastewater is wastewater discharged from PCB circuit industry, printing, steel, feed, coking, pharmaceutical, fertilizer, petrochemical, breeding, glass manufacturing and other industries. In addition, sewage released in people's daily production and life, animal excrement, Garbage permeate and agricultural wastewater, as shown in Table 1, are the ammonia nitrogen content of various factory wastewater. [0003] [0004] A large amount of excess sludge will be produced in the process of sewage treatment, and the cost of treatment and disposal of excess sludge accounts for 25-65% of the sewage treatment, which is very expensive. But at the same time, the main components in the remaining sludge are microorganisms, wh...

AI Technical Summary

Problems solved by technology

However, the nitrogen in the actual wastewater is often dominated by ammonia nitrogen, and the acquisition of nitrite nitrogen in the anammox process still requires forced aeration to achieve short-range nitrification, resulting in high operating costs; the anammox reaction will have Partial nitrate nitrogen is generated, and complete denitrification cannot be achieved; at the same time, there is a problem of substrate inhibition in the anammox process, and anammox bacteria are sensitive to higher concentrations of nitrite nitrogen; in addition, anammox bacteria grow slowly , it takes a long time to enrich the mixed culture with high anammox activity, which has become a major bottleneck restricting the application and development of this new biological denitrification technology

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