ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
ABSTRACT
Dewatering from sludge is an important sustainable issue in recent years, in this work, we found the unique behavior: Skeleton builder additions can improve the dewatering performance greatly, which related to the different pore structure of skeleton builder. As compared to the coal ash, sawdust and rice husk char are easier to construct porous channels in the sludge body, which is responsible for the discharge of water. the dewatering efficiency can increased from approximately 30%–65% by pipe network effect and interlayer channel effect, a sufficient amount of skeleton builders establish a complete pipe drainage network in the sludge body, allowing the water to be discharged fluently. Moreover, the skeleton builders can cause the sludge body to form a layered structure. Under the combined action of pipe network effect and interlayer channel effect, the deep-dewatering effect increased largely by the addition of skeleton builders.
Conclusion
In this work, we found that the addition of skeleton builders can significantly improve the dewatering effect of sludge, The sludge dewatering effect of sawdust or RHC was much better than that of PCA. These differences were related to their own properties, such as pore volume, average pore size, surface morphology, at low dose (< 2.5%) of skeleton builder addition, negligible dewatering can be attached, while higher doses can construct the microstructure with sludge and form a fast water discharging. Especially, the fast dewatering process can also form a layered structure of sludge cake, which further favors the interior water discharging. Pipe network and interlayer channel effects can well explain the improved dewatering of sludge.