What factors are considered in the adjustment of buried sewage treatment？

     What are the factors that should be considered when choosing to use sludge conditioners?

(1) Variety characteristics of conditioners. When selecting inorganic conditioning agents, use iron salts as much as possible; when using iron salts will cause many problems, consider using aluminum salts. If a vacuum filter and a plate and frame filter press are used to dewater the sludge, inorganic conditioners can be considered. When using centrifugal dehydrators and belt filter presses to dehydrate sludge, organic conditioners can be considered. When using inorganic or organic conditioning agents that are difficult to achieve the desired conditioning effect, consider combining inorganic and organic conditioning agents. For example, the combined use of lime and ferric chloride can not only adjust the pH value, but also the calcium carbonate particle structure formed by the lime and the bicarbonate in the sewage can increase the porosity of the sludge and promote the separation of mud and water.

ature of sludge. For sludge with high organic content, the more effective conditioner is cationic organic polymer conditioner. The higher the organic content, the higher the degree of polymerization of cationic organic polymer conditioner. For sludge dominated by inorganic substances, an anionic organic polymer conditioner can be considered. The different properties of the sludge directly affect the conditioning effect: the sludge in the primary settling tank is easier to dewater, while the scum and the remaining activated sludge are more difficult to dewater, and the dewatering performance of the mixed sludge is somewhere in between. Generally speaking, the more difficult to dehydrate the sludge, the larger the dosage of conditioning agents and the finer sludge particles will lead to an increase in the consumption of conditioners. The high organic content and alkalinity in the sludge will also lead to an increase in the amount of conditioning agents. Big. In addition, the sludge solid content also affects the dosage of the conditioning agent. Generally, the higher the sludge solid content, the greater the dosage of the conditioning agent.

(3) Temperature. The temperature of the sludge directly affects the hydrolysis of inorganic salt conditioners. When the temperature is low, the hydrolysis will slow down. If the temperature is lower than 10°C, the conditioning effect will be significantly worse. The conditioning effect can be improved by appropriately extending the conditioning time. When the temperature is low in winter, attention should be paid to the thermal insulation of the sludge conveying system (the temperature of the sludge discharged from the sewage treatment system is generally not lower than 15°C) to minimize the heat loss during the sludge conveying process. If necessary, it is possible to improve the dissolution conditions by heating the organic polymer conditioning agent dilution tank or by appropriately extending the mixing and dissolving time and increasing the stirring intensity.

      Doyen specializes in providing belt press equipment for the Southeast Asian market. Welcome to visit our workshop and formulate a more scientific sludge treatment plan based on the actual situation of your company. Welcome to visit joyce@doyenchina.com or visit https://www.doyenchina.com.