There are many methods for treating aquaculture wastewater, which can generally be categorized into four main types: biological treatment, physical treatment, chemical treatment, and natural treatment. 1. Biological Treatment: This method uses the metabolic activity of microorganisms to transform organic pollutants in solution, colloid, and finely suspended states in wastewater
1. It has a high concentration of organic matter, a lot of suspended solids, and a dark color. It contains a large amount of animal feces, resulting in a very high concentration of NH3-N, and also contains a large number of pathogenic bacteria. 2. The pollutants in the wastewater mainly
I. Types of Livestock and Poultry Wastewater 1. Based on the type of livestock and poultry raised, livestock and poultry wastewater can be classified into: chicken wastewater, duck (goose) wastewater, rabbit wastewater, pig wastewater, cattle wastewater, and sheep wastewater. The water quality varies for each type of wastewater, but the
There are many methods for treating wastewater. Different methods are required depending on the source. Specifically: 1. Degreasing Wastewater: Treatment methods for degreasing wastewater include acid extraction, centrifugation, or solvent extraction. Acid extraction is widely used. H₂SO₄ is added to adjust the pH to 3-4 to break the emulsion. Steam
1. The dyeing and printing industry is one of the largest water-consuming sectors in the textile industry, with water serving as a medium throughout the entire dyeing and finishing process. Dyeing and printing wastewater is characterized by large volume, high color intensity, and complex composition. It contains dyes, sizing agents,
Dyeing and printing wastewater can only be treated through a combination of processes. While developing these processes, it’s also crucial to achieve recycling and reuse, striving for zero wastewater discharge. (1) Conditioning: For wastewater with significant variations in water quality and quantity, the conditioning tank should have a longer retention
An anaerobic-aerobic process for treating pharmaceutical wastewater achieves a BOD5 removal rate of 95% and a COD removal rate of 96%, with stable treatment results. A micro-electrolysis-anaerobic hydrolysis acidification-SBR process for treating chemically synthesized pharmaceutical wastewater shows that the entire series process has strong resistance to changes in wastewater quality
Depending on the different stages of leather tanning (preparation, tanning, and finishing), tanning wastewater sources can be broadly categorized into three types: 1. In the preparatory stage, wastewater mainly originates from washing, soaking, hair removal, liming, deliming, softening, and degreasing; the main pollutants include organic waste, inorganic waste, and organic
1. Sulfur-containing wastewater: This refers to the liming wastewater and corresponding washing wastewater generated during the liming process of hair removal using the lime-alkali method. Lime-liming wastewater contains protein, lime, sodium sulfide, and suspended solids, with total CODcr at 28%, total S2- at 92%, and total SS at 75%. 2.
Biochemical treatment technology is currently the most widely used technology for treating pharmaceutical wastewater, including aerobic biological methods, anaerobic biological methods, and combined aerobic-anaerobic methods. I. Aerobic Biological Treatment Since pharmaceutical wastewater is mostly high-concentration organic wastewater, aerobic biological treatment generally requires dilution of the raw solution, resulting in high
