Starch factory wastewater refers to the wastewater discharged during the starch production process, mainly from the cleaning, refining, deproteinization, slurry separation, drying, and other processes of starch raw materials.
The water used in these processes undergoes a series of physical, chemical, and biological changes and becomes complex wastewater with high concentrations of organic matter, suspended solids, grease, and nutrients.
By adding coagulant, the suspended solids and grease in the wastewater are aggregated into larger clumps to facilitate subsequent sedimentation and separation. Commonly used coagulants include polyaluminum aluminum chloride, polyaluminum sulfate, etc.
Activated carbon is used to adsorb organic matter and heterochromatic substances in wastewater to further purify water quality. Activated carbon has a large specific surface area and good adsorption performance, and can effectively remove refractory organic matter and pigments in wastewater.
Including membrane separation processes such as ultrafiltration and reverse osmosis, dissolved substances, microorganisms, and particulate matter in wastewater can be separated through the micropores and selective permeability of the membrane to achieve a higher level of water purification.
Through physical filtration, large particulate matter, suspended solids, and sediments in wastewater are removed. Commonly used filtration equipment includes grilles, cyclones, and grit chambers.
Starch factory wastewater is often acidic or alkaline and needs to be neutralized. By adding an acid-base neutralizer, the pH of the wastewater is adjusted to a suitable range to facilitate subsequent treatment processes.
Use bioreactors (such as activated sludge method, fixed bed bioreactor, etc.) to degrade organic matter in wastewater. Microorganisms decompose organic matter in the wastewater in the reactor, convert it into more stable substances, and remove nutrients from the water.
Huatai Starch Machinery is a large-scale starch project contractor, which can undertake a full set of large-scale starch production lines, including potato starch, cassava starch, sweet potato starch, corn starch, wheat starch, etc.