Improvement of sewage sludge dewatering by piezoelectric effect driven directly with pressure from pressure filtration: Towards understanding piezo-dewatering mechanism

The paper presents the impact of different methods of sewage sludge conditioning on the improvement of sludge dewatering during pressure filtration processes. The following conditioning methods were tested for sludge preparation: sonication, addition of organic and inorganic chemicals (Zetag 8180, PIX 113 and the combined action of both substances). The research covered: physical and chemical analysis of sewage sludge, measurement of capillary suction time as an indicator of sludge dewaterability, some technical parameters of sludge pressure filtration process and the analysis of filtrate to assess the degree of contamination. The results of the research showed that the final water content of the prepared sludge decreased, while the specific filtration resistance increased. Among the tested methods the best results of sludge dewatering effects were obtained for sonicated sludge and its preparation with inorganic coagulant PIX 113. The combined effect of sonication with the addition of chemicals Zetag 8180 and PIX113 to sludge allowed for the reduction of organic substances, ammonium nitrogen and phosphates in filtrate after sludge dewatering.

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Improvement of sewage sludge dewatering using Ferric Chloride, Aluminum Sulfate and Calcium Oxide (experimental investigation and descriptive statistical analysis)

Water Environment Research ◽

10.1002/wer.1526 ◽

2021 ◽

Author(s):

Flora Ranjbar ◽

Mohsen Karrabi ◽

Shahnaz Danesh ◽

Mohammad Gheibi

Keyword(s):

Experimental Investigation ◽

Statistical Analysis ◽

Sewage Sludge ◽

Calcium Oxide ◽

Ferric Chloride ◽

Aluminum Sulfate ◽

Sludge Dewatering ◽

Descriptive Statistical Analysis

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Effect of adding alum sludge from water treatment plant on sewage sludge dewatering

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2015.07.021 ◽

2016 ◽

Vol 4 (1) ◽

pp. 746-752 ◽

Cited By ~ 18

Author(s):

Jun Li ◽

Liu Liu ◽

Jun Liu ◽

Ting Ma ◽

Ailan Yan ◽

...

Keyword(s):

Water Treatment ◽

Sewage Sludge ◽

Treatment Plant ◽

Water Treatment Plant ◽

Sludge Dewatering ◽

Alum Sludge

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The Concentration and the Abatement Strategy of Organic Contaminants in Sewage Sludge Dewatering

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.1495 ◽

2011 ◽

Vol 356-360 ◽

pp. 1495-1499

Author(s):

Jie Yu ◽

Guo Di Zheng ◽

Tong Bin Chen

Keyword(s):

Sewage Sludge ◽

Organic Contaminants ◽

Environmental Risks ◽

Future Research ◽

Sludge Dewatering ◽

Sludge Disposal ◽

Secondary Pollution ◽

Pollution Problem ◽

Safety And Environment ◽

Abatement Strategy

Sludge agriculture application in future will be one of the main sewage sludge disposal ways in China. To ensure safety and environment of sewage sludge agriculture application, except to strengthen the research of sludge heavy metal, pathogen outside the organic contaminants will be one of the focuses of the future research, especially to strengthen the PAHs and NP/NPE. In order to reduce the environmental risks of sludge agriculture application, using biological aerobic fermentation processing technology treatment sludge can effectively reduce the organic contaminants, depress secondary pollution problem, which sewage sludge brings.

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