Simultaneous removal of antibiotic resistance genes and improved …
The Fe(II)-S 2 O 8 2− oxidation pretreatment demonstrated an excellent performance in enhancing sludge dewatering capacity (up to 76 %); more importantly, besides the targeted domestication effect on the microbial community in the sludge dependent on the original sludge, and Fe(II)-S 2 O 8 2− oxidation can also be effective to crack the ...
Advanced sludge treatment affects extracellular polymeric substances …
Advanced sludge treatment (AST) processes have been developed in order to improve sludge dewatering and to facilitate handling and ultimate disposal. The authors have extensively reported lab-scale, semi-pilot and pilot investigations on either thermal and thermochemical processes, or chemical oxidation using hydrogen peroxide.
Sludge Treatment Technologies and Systems, an Introduction
Sludge dewatering and drying are other methods for volume reduction that go far beyond thickening and reduce water content considerably. Sludge stabilization can be achieved by biological, chemical, and thermal processes and except in the case of alkaline stabilization leads to mass reduction. ... Sludge stabilization results in improved …
Improved Sludge Dewatering by Enzymatic Treatment
By enzymatic hydrolsis it is possible to modify the hydrophilic, water-retaining organic compounds of the sludge in order to reduce its water content. Enzymes improve mechanical dewatering in common belt-type filter presses or decanters in combination with flocculation by means of special flocculating aids. This content is only available as a PDF.
Digested wastewater sludge dewatering process using …
It is generally accepted that sludge dewatering is improved by reducing EPS. By knowing their components and role, therefore, the quantity of EPS in sludge can be reduced by using different methods. Extracellular proteins due to being hydrophilic and having a negative charge play the main role in reducing the dewatering, ...
Enhanced technology based for sewage sludge deep …
The results show that LDH can effectively improve the dewatering performance of sludge and its structure is the key to affecting conditioning performance. LDH can promote the aggregation of EPS (mainly proteins and polysaccharides) by …
Critical review on dewatering of sewage sludge
Sludge dewaterability improvement is reviewed from fundamentals to implementations. •. Challenges and recent advances in water differentiation of bio-sludge …
Oily cold rolling mill sludge conditioned by quicklime to improve …
Dewatering is critical to oily cold rolling mill (CRM) sludge treatment. Therefore, finding an efficient, energy-saving, and applicable dewatering technology for oily CRM sludge is still urgent. This study investigated the performance of quicklime as a conditioning agent for oily CRM sludge conditioning and dewatering. The interactive …
Revitalizing urban lake cleanup: optimizing flocculation and dewatering …
The properly dosage of CPAM could promote dewatering of dredge sludge and improve the settling rate. The optimal dosage of CPAM could be achieved at 0.07% g/g SS. The SRF and CST of dredged sludge with CPAM were 3.26×10 8 and 23s, with 73% and 62% decrease compared to raw dredged sludge, respectively. In addition, …
Towards understanding the dewatering mechanism of sewage sludge
The method to improve the sludge dewatering effect with the combination of FeS2 + PMS + P-BC is as follows: in the first step, pour 0.75 g/g TSS FeS2 and 0.6 g/g TSS PMS into the sludge, and stir ...
Water | Free Full-Text | Preparation, Properties, and
Biochar is a widely available carbon-based material that has been used for soil remediation and sewage treatment. However, in recent years, biochar has received more attention as a conditioning agent to improve the dewatering performance of sewage sludge. The sludge from the secondary sedimentation tank of wastewater treatment …
Unraveling synergistic mechanisms of polyacrylamide …
1. Introduction. Sludge is an inevitable byproduct generated during wastewater treatment plants (WWTP). Sludge dewatering plays a vital role in diminishing sludge volume, facilitating transportation, increasing thermal value for improved energy utilization, and reducing the risk of secondary pollution [1].Extracellular polymeric …
Functionality of surfactants in waste-activated sludge treatment…
Flocculants are widely used to improve the sludge dewatering performance during physical and chemical conditioning. Flocculants can overcome the repulsion between particles and increase the particle size of sludge, leading to improvement in the stabilization and dewatering capacity of sludge (Cheng et al., 2012). …
Introduction to sludge dewatering | Sludge Processing
Characteristics of dewatered sludge. Dewatering processes can potentially remove both the free water and a proportion of the interstitial (or floc) water. The dewatered sludge, or cake, %DS content can range from 13−46% depending on the feed sludge characteristics and the dewatering technology employed (Table 1).
Sludge Dewatering and Thickening
Sludge can be thickened to 8-10% total solids. A pump then sends the sludge to the anaerobic digester. At the top of the basin is the scum collector and discharge. A gravity thickener uses gravitational forces to separate water from sludge and is mainly used on primary sludge at plants still using this technology.
The enhanced dewaterability of sludge by a starch …
sludge dewatering, and an environmentally-friendly and e˝ective combined conditioning processes with other pre-treatments can notably improve the dewaterability of sludge 1,6,12,13 . OPEN
Progress of improving waste activated sludge
Dewatering is an essential and important step during the sludge treatment and disposal process for it could efficiently reduce its volume, and be beneficial to the …
Improving dewaterability of sewage sludge by inoculating acidified
However, the sludge dewatering performance can be improved by protonation of the protein under acidic conditions and agglomeration due to isoelectric precipitation, as reported by Yu et al. (2008). Thus, the reduced PN concentration in EPS fractions could significantly improve sludge dewaterability, while the influence of PS on …
Hydrothermal alkaline conversion of sewage sludge …
In this study, a facile hydrothermal-alkali method was proposed for sludge dewatering and HA extraction. Hydrothermal-alkali method was used as a pretreatment …
Improve Sludge Dewatering Performance byHydrothermal …
In China, over 14.3 million tons dewatered sewage sludge, with 80% water content, generated from wastewater treatment plants in 2007. Traditional technologies used by municipal solid waste treatment facilities, such as landfill, composting, incineration, are unsuitable for sludge disposal. High water content is the bottleneck of sludge treatment …
Improvement of Sludge Dewatering by Ultrasonic …
In 2012, Huan et al. improved sludge dewatering by 5% using ultrasonic waves (Huan et al. 2009).In a 2012 study by Sahinkaya et al. on sludge dewatering, the optimum ultrasound density was in the range of 0.75–1 W/mL, increasing the density of the ultrasound to more than 1.2 W/mL or less than 0.5 W/mL reduced the dewatering …
Improved dewatering of CEPT sludge by …
Sludge disposal technology is facing challenges and opportunities simultaneously and can still be improved. Sludge dewatering is an essential process in sludge disposal, and it is …
Advanced oxidation-based combined conditioning technologies to improve
Ding et al. found that predation of sludge flocs by aquatic worm was used to improve the dewatering performance of sludge [100]. After 4 days of treatment, the CST of the sludge was 16.69 s and the SRF was reduced by 48.95 %. The method was also found to be effective in reducing the absolute zeta potential, sludge size and viscosity by ...
Understanding the synergistic mechanism of PAM-FeCl3 for improved …
Hybrid flocculant polyacrylamide-ferric chloride (PAM-FeCl 3) was developed to improve the dewaterability of sewage sludge and the dewatering performance, properties of treated sludge, composition and morphology distribution of extracellular polymeric substance (EPS) were investigated.The physicochemical properties of the …
The enhanced dewaterability of sludge by a …
OPEN. The enhanced dewaterability of sludge by a starch‐based flocculant combined with attapulgite. Shaohang Shen 1, Hua Wei 2, Yu Pan 1, Pan Hu 1 & Hu Yang 1* …
Application of filtration aids for improving sludge dewatering
Using lignite, a low-rank coal, as a filter aid to improve dewatering of a digested sewage sludge, Thapa et al. [15] correlated the improved sludge dewaterability with filter cake properties by quantitatively analysing the cake porosity, permeability and resistance to compression as measured by the cake yield stress.
Hybrid conditioning of ionic liquid coupling with H2SO4 to improve …
When [C 4 mim][CF 3 SO 3] and H 2 SO 4 acidification were coupled for sludge treatment, sludge dewatering performance was improved (see Fig. 6d). The content of proteins in the sludge supernatant was reduced after acidification treatment, and the hydrophobicity of the sludge flocs was enhanced due to the change of …
Application of Advanced Oxidation Technology in …
Application of Advanced Oxidation Technology in Sludge Conditioning and Dewatering: A Critical Review. by. Jiahua Xia. 1, Juan Ji. 1, Zhiqiang Hu. 1, Ting Rao. 1, Ankang Liu. 2, Jingqian Ma. 3 and. …
Sludge Dewatering
Although ultrasonic pretreatment shows an improvement for sludge dewatering, some research promotes the coupling effect of ultrasound with chemical methods together with the implementation of additives for improved effects (Ruiz et al., 2013). Undoubtedly, sludge dewatering is an important issue that is in the sights of the scientific community ...
Improved Dewatering by Hydrothermal Conversion of Sludge
Improved Dewatering by Hydrothermal Conversion of Sludge. A growing demand for renewable energy resources, together with increasing criticism on the competition with food crop production caused by current production methods, has stimulated new interest for fuel production from sewage sludge. One of the processes to recover fuel from sludge is ...