Seafood Processing Wastewater Treatment
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Phone
+86-158 6303 7696
+86-139 6390 1909
cnrunyuan@gmail.com
Seafood Processing Wastewater Treatment
Wastewater Quality Characteristics
The wastewater originates from raw material thawing, cleaning, scaling, evisceration, cooking & cooling, pickling, equipment & floor washing, and workshop CIP cleaning. Dissolved substances mainly include proteins, amino acids, fats, polypeptides and a small amount of carbohydrates, mixed with fish scales, fish bones, meat scraps, blood stains and shell fragments.
(1) High concentration of organic matter, mostly soluble protein and colloidal organics that are easily biodegradable by microorganisms.
(2) High suspended solids (SS) with special components: large particles such as fish bones, shells and minced meat settle readily, while fine colloids (meat emulsion, protein colloid) are difficult to settle naturally.
(3) Floating oil, dispersed oil and a small quantity of emulsified oil exist, which can wrap microorganisms to inhibit biochemical reactions, and cause packing clogging & membrane fouling.
(4) High salinity in wastewater from seafood, fish, shrimp and shellfish processing: salinity of cleaning wastewater ranges from 1% to 3%, while strong wastewater from pickling and marinating sections reaches 4%–5%. High chloride ions suppress common activated sludge microorganisms and corrode structures and equipment.
Typical Treatment Process
Technical Features
(1) The regulation tank adopts hydraulic retention time (HRT) ≥8–12 h with pre-aeration to avoid anaerobic odor generation at the tank bottom.
(2) Dissolved Air Flotation (DAF) removes floating oil, emulsified oil and fine meat scraps efficiently.
(3) The hydrolytic acidification process features low organic loading and easy operation & maintenance, suitable for high-salinity working conditions;
(4) Sludge is acclimated via gradient salinity increase: salinity is raised by 0.2%–0.3% weekly; organic loading shall be reduced when salinity exceeds 3%.
EPC Service offered
(1) Freely Preliminary Technical Consultation
(2) Treatment Process design
(3) Comprehensive Project Equipment Supply
(4) Installation Technical Support
(5) Debugging Technical Support
+86-158 6303 7696
cnrunyuan@gmail.com
Phone
+86-158 6303 7696
+86-139 6390 1909
Address
Room 810, Building 1, Hisense Caizhi Valley, No. 88, Zhuzhou Road, Qingdao, Shandong, China