Casing processing and heparin extraction wastewater treatment technology

Abstract

The invention relates to a casing processing and heparin extraction wastewater treatment technology. The technology comprises the following steps: wastewater is collected in a collecting tank, is pumped into a DPASB<+> reactor through a lifting pump, is fermented, then automatically flows into a first sedimentation tank, and undergoes flocculent sedimentation; then the wastewater enters a stripper, undergoes ammonia nitrogen stripping, then flows into a second sedimentation tank, enters a biochemical water distribution tank, and is heated; effluent of the water distribution tank enters a firstDPABR anaerobic biological reaction tank, effluent of the first reaction tank flows into a DPSBR bioreactor, effluent of the reactor flows into an intermediate tank, is continuously heated, the wastewater in the intermediate tank is lifted into a second DPABR anaerobic biological reaction tank, the effluent of the second reaction tank flows into a DPMO aerobic biological reaction tank, the effluent of the DPMO aerobic biological reaction tank enters a return sedimentation tank, the effluent of the return sedimentation tank automatically flows into a biological aerated filter, the effluent ofthe biological aerated filter enters a third sedimentation tank, the effluent of the biological aerated filter enters a break point chlorination tank, and 0.1% sodium hypochlorite is added into the break point chlorination tank; and the effluent of the break point chlorination tank automatically flows into an activated carbon adsorption tank, and carbon powder is added into the activated carbon adsorption tank in order to achieve standard-meeting discharge.

Description

technical field [0001] The invention relates to a waste water treatment process for sausage casing processing and heparin extraction, which is applied to the waste water treatment technology. Background technique [0002] The salt, ammonia nitrogen, and total nitrogen of casing processing and heparin extraction wastewater are far beyond the capacity of traditional biochemical technology, and the content of polypeptide, protein, and animal oil in this type of wastewater is particularly high. The actual operation effect of conventional pretreatment methods such as flocculation and sedimentation Relatively poor, the sedimentation and hydrophobicity of sludge are poor, and sludge disposal is also a problem. The current method for this type of wastewater is to dilute the above pollutants by about 5-10 times to reduce the concentration of the above pollutants to the tolerance range of traditional microorganisms, and then treat them in the conventional way of flocculation sedimenta...

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Problems solved by technology

Dilution itself is a violation of regulations. At the same time, dilution requires a large amount of water resources and doubles the cost of sewage discharge; the flocculation and sedimentation process consumes an astonishing amount of chemicals and has poor settling properties. The sludge is difficult to press filter, and the water content exceeds 93%. The cost of sludge disposal is also very high; even if it is diluted and operated, the stability of the system is still extremely poor, the effluent quality is difficult to meet the national discharge standards, and the system is prone to sludge swelling and collapse, which has become a serious problem that limits the survival of the casing and heparin extraction industries. question

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