scholarly journals Experience of using sewage sludge in soil for green building

2022 ◽  
Vol 42 ◽  
pp. 03001
Author(s):  
Irina Elshaeva ◽  
Vera Titova ◽  
Alexander Vetchinnikov ◽  
Anna Pinaeva ◽  
Oksana Vetchinnikova
Keyword(s):  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Green Building ◽  
Wastewater Sludge ◽  
Organic Soils ◽  
Municipal Wastewater Treatment ◽  
Soil Components ◽  
Municipal Wastewater Treatment Plants ◽  
Lawn Maintenance

Wastewater sludge from municipal wastewater treatment plants in Nizhny Novgorod and soils based on them, prepared with different ratios of sludge, sawdust and peat, have been investigated. Sewage sludge-based soils contain plant nutrients and are suitable for use as fertilizing materials in green building. Under the conditions of a three-year lysimetric experiment on cereal lawn grasses, a significant efficiency of organic soils was noted in comparison with traditional soils. The lawn maintenance regime revealed differences in the mixtures of fertilizing materials in terms of the effect on the productivity of the phytocenosis. Use of sewage sludge containing large amounts of heavy metals as one of the soil components undoubtedly leads to increase in the amount of these toxic elements in the soil as a whole.

scholarly journals Production and Destination of Sewage Sludge in the Piemonte Region (Italy): The Results of a Survey for a Future Sustainable Management

2021 ◽  
Vol 18 (7) ◽  
pp. 3556
Author(s):  
Giuseppe Campo ◽  
Alberto Cerutti ◽  
Claudio Lastella ◽  
Aldo Leo ◽  
Deborah Panepinto ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Sustainable Management ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Similar Amount ◽  
Municipal Wastewater Treatment ◽  
Sludge Management ◽  
Subsequent Step ◽  
German Legislation ◽  
Municipal Wastewater Treatment Plants

The management of sewage sludge originated from municipal wastewater treatment plants (WWTPs) is an urgent issue. In 2019, the local authority of the Piemonte region started a survey with the aim of collecting recent data concerning wastewater and sludge management in the WWTPs located in its own territory. The survey’s results revealed that 60% of the sludge (51,000 t, as dry substance, d.s.) produced by the local WWTPs was recovered or disposed of outside of the region, and a similar amount of sludge was recovered in agriculture directly or after composting. The increase in the costs to accommodate sewage sludge in recovery or disposal plants, followed to a recent Italian Sentence (27958/2017), and the more and more stringent requirements fixed by lots of European countries for the application of sludge in agriculture, are pushing the Piemonte region authority to re-organize its own network for sludge management, with solutions based onto proximity and diversification. Whether the provisions of the current German legislation are applied in the future also in Italy, approx. 90% of sewage sludge produced into the Piemonte region should be incinerated, with a subsequent step of phosphorous recovery. The new regional plan, according to the Regional Address Deed, should consider a diversification of sludge treatment and recovery practices. On this basis, a need for new plants for around 40,000 t d.s./y could be planned.

scholarly journals Investigating the effects of different cationic charge flocculation polymers on municipal wastewater sludge dewatering

2021 ◽  
Author(s):  
Megan Abrahams ◽  
Mujahid Aziz ◽  
Godwill Kasongo
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Operating Cost ◽  
Wastewater Sludge ◽  
Municipal Wastewater Treatment ◽  
Bench Scale ◽  
Treated Effluent ◽  
Solids Concentration ◽  
Municipal Wastewater Treatment Plants ◽  
Polymer Flocculant

Abstract The minimization of sludge produced by municipal wastewater treatment plants (MWWTPs) is critical as its handling accounts for approximately 50% of the total operating cost. The challenges in predicting dewatering performance can be overcome by optimizing the sludge treatment process, especially conditioning and dewatering. This study aimed to investigate sludge dewaterability at four different MWWTPs, using a gravity drainage test unit and a bench-scale press. The effect of differently treated effluent used as a solvent to mix the flocculation polymers was observed during dewatering. The membrane bioreactor (MBR) treated effluent yielded the highest filtrate volume in the lowest amount of time, with the least polymer flocculant dosage. The Box Behnken Design model fitted the data and proved a relationship between polymer dosage, cake solids concentration, and cake height during the bench-scale press tests.

Evaluating the stabilisation degree of digested sewage sludge: investigations at four municipal wastewater treatment plants

2006 ◽  
Vol 53 (8) ◽  
pp. 81-90 ◽  
Author(s):  
V. Parravicini ◽  
E. Smidt ◽  
K. Svardal ◽  
H. Kroiss
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Municipal Wastewater Treatment ◽  
Digested Sludge ◽  
Aerobic Conditions ◽  
Specific Oxygen Uptake Rate ◽  
Municipal Wastewater Treatment Plants ◽  
Digested Sewage Sludge

Further reduction of volatile suspended solids (VSS) during a post-stabilisation step was applied to evaluate the stabilisation degree of digested sewage sludge. For this purpose digested sludge was collected at four municipal wastewater treatment plants (WWTPs) and further stabilised in lab-scale chemostat reactors either under anaerobic or aerobic conditions. Experimental results showed that even in adequately digested sludge a consistent amount of VSS was degraded during aerobic post-stabilisation. It seems that aerobic conditions play a significant role during degradation of residual VSS. Additionally, specific VSS production (gVSS/peCOD110.d) as well as specific oxygen uptake rate were shown to be suitable parameters to assess the degree of sludge stabilisation at WWTPs. Fourier transform infrared spectroscopy was used to reveal changes in the sludge composition. Spectra of treated and untreated sludge samples indicated that the major component of residual VSS in stabilised sludge for instance consisted of biomass, while cellulose was absent.

Experimental Determination of Thermal Characteristics of Wastewater Sludge for Design of Incineration Plants

2017 ◽  
Vol 21 (3) ◽  
pp. 32-35
Author(s):  
P.V. Khoreva ◽  
I.M. Bernadiner
Keyword(s):  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Experimental Studies ◽  
Thermal Characteristics ◽  
Wastewater Sludge ◽  
Municipal Wastewater Treatment ◽  
Water Problem ◽  
Discharge Regulation ◽  
Regulation Mechanisms ◽  
Municipal Wastewater Treatment Plants

Current trends of improving of wastewater discharge regulation mechanisms in centralized municipal systems of sewage disposal and in water bodies, the tightening of the requirements for the quality of wastewater, stimulate the development of technologies for their treatment. While improving the quality characteristics of the treated water, problem of formation and subsequent disposal of large source of waste – wastewater sludge (WS) – remains unresolved to date. There were presented information confirming the increase in the volumes of WS produced at municipal wastewater treatment plants. There were presented results of experimental studies on the effect of the thermal characteristics of sludge on the process of their incineration.

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