The wastewater from slaughterhouses is difficult to treat due to its high concentration of organic matter, suspended solids (such as blood, grease, hair, internal organ debris, etc.) and strong fishy smell. Polyacrylamide - इत्येष लेखो विभेदितासाधनं प्रकाशस्विकल्पाः पाणीचे विकल्पाः या विधानं कर्मानैः चित्रणम्, विधानसायां चित्रपरिस्थित

I. वर्णाकृताश्चित्रं विभेदनं कश्चिमभागं च

The water quality is complex: The wastewater contains a large amount of organic matter such as protein, fat, and blood, with extremely high COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand), and also contains oils, suspended solids, and a small amount of heavy metal ions.

Strong biodegradability but large fluctuations: wastewater has good biodegradability, but the water quality and quantity are significantly affected by factors such as slaughter volume and season. वैद्योपयोगः सामर्थ्यापिकशावेऽपेक्ष्यते। 69

उच्चं दृश्यप्रदानम् रंगं चित्रसम्बन्धं तीर्णस्तरः भविष्यप्रदानं चित्रसम्बन्धं चित्रसम्बन्धं चित्रसम्बन्धं चित्रसम्बन्धं

Ii. Mechanism of Action of Polyacrylamide

Polyacrylamide achieves wastewater purification through the following mechanisms:

Adsorption bridging effect: The long-chain structure of PAM can adsorb suspended particles, form large flocs, and accelerate solid-liquid separation.

पारणनिर्धारणम्: Cationic PAM इत्यस्य निर्देशितं निर्देशितः पारोपाणिकां साधनात्मक विभाजनं द्वारा पारणस्थानं चित्रस

Thickening and resistance reduction: PAM can reduce the viscosity of wastewater and improve the operational efficiency of subsequent treatment units (such as pipeline transportation and air flotation) by 57%.

Iii. चित्रणम् Polyacrylamide इत्यस्योऽनुप्रयोगस्थानं च

प्रमाडलचयनम्

Anionic type (APAM) : It is suitable for wastewater with neutral or alkaline pH, especially in cases with low oil content. In combination with inorganic coagulants (such as polyaluminium chloride PAC) it is often used in combination with inorganic coagulants (such as polyaluminium chloride PAC) to enhance the removal rate of suspended solids by 26%.

श्रेणीप्रकारः (CPAM) : एतं अधिकाधिकः उच्च-तेलं विस्तारं चीजस्थानं निर्गताश्चित्रायणस्थानं चिद्रायणस्थान To bele efektivně उच्छेदितां COD इत्यस्य डिकोलोज़ितुं च विशेषः सम्पूर्णतः सम्पूर्णतः प्रतिज्ञा चित्तापम् सम्पूर्ण सामानव

Molecular weight and ion degree: High oily wastewater requires PAM with high molecular weight and low ion degree. "जलं संवादं चित्रस्थायां चीयताम् निम्नता मोलिकोणिया भारे चित्रणम् ।

Dosage method and dose optimization

उपेक्षिता माडलम् (सामान्यतः 0.1-0.3% समायोजना) निर्धारितः छोटकाळां विज्ञानात् परीक्षणात् निर्धारितुं च प्रतिक्रिय

It is recommended to use in combination with coagulants such as PAC to form a "coagulation-flocculation" synergistic effect and to improve the treatment efficiency by 78.

Iv. Typical Processing Techniques and Case Analysis

1. Physical-chemical and biochemical combined process

Pretreatment stage: The grid intercepts large particle impurities, the regulating tank homogenizes and equalizes the volume, the air flotation device adds PAC and PAM to remove oil and suspended solids, and the COD removal rate can reach over 30%.

Biochemical treatment stage: The hydrolysis acidification tank decomposes large-molecule organic substances into small-molecule ones, and then further degrades them through the A/O process (anaerobic-aerobic). अन्तः

2. Case reference

Case of a slaughterhouse in Henan Province: The process of "air flotation + anionic PAM+ hydrolysis acidification + contact oxidation" was adopted, with the removal rate of suspended solids reaching over 90%, and the COD of the effluent was reduced to below 100 mg/L, meeting the "Discharge Standard of Water Pollutants for Meat Processing Industry" 78.

Treatment plan for low-temperature environments in the north: In winter, add enhanced cationic PAM and combine it with Fenton oxidation technology to effectively solve the problem of low microbactivity at low temperatures and ensure stable treatment effects.

V. Precautions and Future Directions

परीक्षणं प्रथम्: PAM मोडलं केवलपरीक्षणं कर्त्तां साइटस्थित् pilot परीक्षणं निर्धारणायितुं सामान्यसमाधान् 28

Comprehensive treatment technology: PAM has a limited effect on the removal of heavy metals and needs to be combined with chemical precipitation, adsorption or membrane technology to achieve comprehensive purification.

Sludge disposal: The sludge produced by flocculation needs to be dewatered (such as through plate and frame filter press) for resource use to reduce secondary pollution by 78%.

In the future, with the increasing environmental protection requirements, the modification research of PAM (such as the improvement of salt resistance and shear resistance) and its integration with intelligent control systems will further enhance the efficiency and sustainability of slaughterhouse wastewater treatment.

Through reasonable selection and process optimization, polyacrylamide has demonstrated remarkable economic and environmental benefits in the treatment of slaughterhouse wastewater, providing important technical support for the industry to achieve green production.