Sludge disintegration techniques: In-depth review | ||
| The Egyptian International Journal of Engineering Sciences and Technology | ||
| Articles in Press, Accepted Manuscript, Available Online from 06 January 2025 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eijest.2025.331733.1301 | ||
| Authors | ||
| Ahmed Seaf; Dalia Ahmed; Zaki Elsafty* | ||
| Environmental Engineering Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt. | ||
| Abstract | ||
| Nowadays, sludge is considered a concern problem due to the huge quantities of sludge produced from wastewater treatment plants (WWPT) and it is danger and threat to human health and environment. Therefore, there are a several processes which can be utilized on sludge for safe removal and benefiting from it in many purposes. Among these processes, anaerobic digestion (AD) is competent, cheap, promising and sustainable process. However, AD is long-time consumer especially for hydrolyses stage because of some complex components like EPS. Hance, to overcome this problem, several sludge pretreatment technologies can be employed before AD such as chemical, physical and biological methods or a combination of these approaches. The previous methods can disintegrate sludge, damage cell wall and EPS, release sludge to soluble phase and improve dewaterability resulting in increasing hydrolyses rate, reducing the digestion time (HRT), enhancing AD performance and this leads to more biogas generation which can be utilized a energy provider and electricity to balance the operation and maintenance cost of WWPT or sludge treatment cost. This review paper will focus on the efficient role of different pretreatment methods on sludge properties and AD efficiency. | ||
| Keywords | ||
| Sludge; Anaerobic digestion; Hydrolyses; pretreatment; Biogas | ||
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