Questions regarding aquaculture wastewater – water quality concerns
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Aquaculture wastewater: COD 4700, ammonia nitrogen 1000, total phosphorus 65; 300 tons/day. Emission standards: Grade A, Issue 1: Is 1,000 for ammonia nitrogen really that high? The owner said it has been tested. 2: Process flow: equalization tank + solid-liquid separator + sedimentation tank + UASB + AO + MBR. What are everyone’s thoughts? 3: Should stripping be considered? If so, where is the most appropriate place to implement it?
This post was last edited by Gorou’s Eight Trigrams Staff on 2015-7-16 at 20:47. Do you really intend to reach level A? COD≤50, ammonia nitrogen≤5, total phosphorus≤0.5! The ammonia nitrogen level in aquaculture wastewater is generally quite high; in some facilities, it can exceed 10,000. If stripping is used, it’s best to do it before the biochemical step.
Ammonia nitrogen is removed from wastewater using stripping, and then what?
With our pretreatment and advanced oxidation process, the COD level is likely to be less than or equal to 500; if a lower level is required, the operating costs will increase accordingly. As for phosphorus, industry tests have shown that this oxidation technology achieves a phosphorus removal rate of 90%. Those who are interested are welcome to visit our company for an inspection or to bring the pilot-scale testing equipment to our site for testing; the testing cost is free, and further discussions can be held if the results are satisfactory
It can be anaerobically treated to produce biogas, which can be used as organic fertilizer.
Ammonia nitrogen at 1000 – it’s best to carry out some pretreatment
May I ask how the original poster selects the process at present? How is it performing currently?
It is quite high. There are multiple combinations of processes available, so it’s necessary to choose the appropriate one.