Comprehensive Treatment Strategies for Wood Processing and Bamboo Dyeing Wastewater: From Characteristics to Polyacrylamide Solutions

Wood processing wastewater includes cooking wastewater, thermofiner wastewater, dewatering wastewater of chemical synthesis and cleaning wastewater. Cooking wastewater of cooking process is the main source of wood processing wastewater. Cooking wastewater belongs to high concentration organic wastewater. Big volume, high chroma, high lignin content and poor biodegradability is the characters of cooking wastewater. Some cooking wastewater has high temperature and strong pollution. Some cooking wastewater contains harmful chemicals like methanal. Cooking wastewater will cause serious damage to water if discharged directly. 

Wood processing wastewater varies due to different production process. The treatment of wood processing wastewater normally needs the combination of biotreatment and physicochemical treatment. The wastewater will be discharged when it meets emission standard. For sludge of concentration basin, cationic polyacrylamide will be added before dewatering in dewatering equipment. Mud cake will be landfilled or utilized integratedly.  

Dyeing of bamboo is reached by cooking bamboo in dyeing kettle with synthetic dyestuff. Due to the rich variety of color model and each model could be used repeatedly, there will be a lot of bamboo dyeing wastewater. For some different dyeing process, bamboo will be washed after dyeing. This increases the volume of wastewater. 

The treatment of dyeing wastewater needs to combine all the dyeing wastewater, then pumped to coagulant basin. Adjust the pH of wastewater to 8-10. Add decolorizing agent at concentration of 0.05%-0.5% (depends on the concentration of wastewater). Add Water Treatment Polyacrylamide to settle. Dewatering of settled sludge could be outsourced. 

To find the most suitable polyacrylamide for wood processing wastewater or bamboo dyeing wastewater, lab test is needed first. After lab test, pilot test is needed on machine in the plant to check performance in the real situation. After test, the polyacrylamide type will be finally confirmed. Hengfeng provide service including inquiry, lab test and pilot test. We provide not only products but also service.