Decontamination of Heavy Metals From Municipal Sewage Sludge (MSS) by Electrokinetic Remediation

2019 ◽  
Author(s):  
A. Ribeiro ◽  
J. Araújo ◽  
A. Mota ◽  
R. Campos ◽  
C. Vilarinho ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Operation Time ◽  
Electrokinetic Remediation ◽  
Permeable Reactive Barrier ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Reactive Barrier

Abstract A large quantity of sludges resulting from the treatment of MWWTP (Municipal Wastewater Treatment Plant) effluent is generated annually following the increase of population density and acceleration of urbanization. Sludge production in Europe has been predicted by around 12 million tons in 2020. As a solid waste, appropriate disposal of Municipal Sewage Sludge (MSS) has been taken seriously due to its larger volume and toxic substances such as heavy metals. Electrokinetic remediation has more advantages in heavy metals uptake compared to other technologies, due to the ability to treat soils in-situ and to remove heavy metals from soils. In this work, it was studied the remediation of MSS by the electrokinetic remediation coupled with activated carbon (AC) as a permeable reactive barrier (PRB). It was applied an electric current of 3 V cm−1 and it was used an AC/sludge ratio of 30 g kg−1 of contaminated sludge for the preparation of the PRB. In each trial, the evolution of cadmium (Cd), lead (Pb), copper (Cu), chromium (Cr), nickel (Ni) and zinc (Zn) removal from the sludge were evaluated. Results proved that this process is perfectly suited for the removal of chromium, nickel and zinc metals from the sludge. At the end of the operation time, it was achieved a maximum removal rate of 56% for chromium, 73% for nickel and 99% for zinc, with initial concentrations of 2790 mg kg−1, 2840 mg kg−1, and 94200 mg kg−1, respectively. Based on these results, it was proved the technical viability of the proposed technology (electrokinetic with AC as a permeable reactive barrier) to treat municipal sewage sludges.

Effect of Mussel Shells as a Permeable Reactive Barrier in Municipal Sewage Sludge Treatment by Electrokinetic Remediation

2020 ◽  
Vol 1013 ◽  
pp. 81-90
Author(s):  
André Ribeiro ◽  
André Mota ◽  
Jorge Araújo ◽  
Cândida Vilarinho ◽  
Joana Carvalho
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Operation Time ◽  
Electrokinetic Remediation ◽  
Permeable Reactive Barrier ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Reactive Barrier ◽  
Study Results ◽  
Mussel Shells

IIn this work, it was evaluate the utilization of mussel shells (raw and calcinated) as a permeable reactive barrier (PRB) for the treatment of municipal sewage sludge (MSS) contaminated with heavy metals, creating a novel combined system, which integrates two technologies: electrokinetic remediation technology, and adsorption by the utilization of mussel shells adsorbents. Regarding the adsorption process into the mussel shells adsorbents, it was also aimed to study the influence of aragonite and calcite on the adsorption of lead (Pb), copper (Cu), chromium (Cr), and zinc (Zn). For the preparation of the PRB, it was used three adsorbents: MEXMT (raw mussel shells); MEXMT 600 (mussel shells calcinated at 600°C) and finally, a commercial calcium carbonate (CCCom). It was applied an electric current of 1 V cm-1 and it was used an adsorbent/sludge ratio of 30 g kg-1 of contaminated sludge for the preparation of the PRB. Results proved that this process is perfectly suited for the removal of the heavy metals understudy from the sludge, especially with MEXMT (raw mussel shells) adsorbent. With this adsorbent, at the end of the 92 hours of operation time, it was obtained high removal rates for each metal in study. Results demonstrate that higher removals rates were achieved in lead (92%), followed by zinc (82%), copper (76%), and finally chromium with 72%. Based on these results, it was proved the technical viability of the proposed technology (electrokinetic remediation with raw mussel shells as a permeable reactive barrier) to treat municipal sewage sludges.

scholarly journals The determination of fertiliser quality of the formed struvite from a WWTP

2021 ◽  
Author(s):  
C. González ◽  
B. Fernández ◽  
F. Molina ◽  
M. A. Camargo-Valero ◽  
C. Peláez
Keyword(s):  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Crop Yields ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Municipal Wastewater Treatment ◽  
Sand Column ◽  
Global Food Security ◽  
Dewatered Sewage Sludge

Abstract Struvite from nutrient-rich wastewaters has been identified as a potential substitute for commercial mineral fertilisers, with the added benefit of reducing threats to global food security by prolonging phosphate rock reserves. A fertilisation test using grass (Brachiaria brizantha Marandú) and a sand column leaching test was conducted to determine the agronomic effectiveness of struvite precipitates produced from the supernatant of dewatered sewage sludge (centrate) from a municipal Wastewater Treatment Plant (WWTP). The performance of this struvite as a fertiliser was compared with Biosolids and commercial fertilisers (Urea and Triple15). The results show that the concentration of heavy metals in struvite was lower than in Biosolids and below the limits of Colombia and European fertiliser regulations. Struvite increased the uptake of N and P in grass, resulting in crop yields similar to other treatments tested. Struvite use as an effective slow-release fertiliser is highly dependent on the size of crystal particles, particularly in achieving low P losses but resulted in high N loss in the sand columns tested; N loses from struvite were higher than in the commercial fertilisers due to the struvite small particle size. Therefore, struvite represents a suitable opportunity to recover and recycle nutrients from municipal sewage sludge, facilitating the effective reuse of P and N in agriculture and uptake by plants.

Safe Utilization of Municipal Sewage Sludge in Agriculture and Forestry

2015 ◽  
Vol 768 ◽  
pp. 542-552
Author(s):  
Liang Hei ◽  
Hui Wang ◽  
Qi Tang Wu ◽  
Wei Peng Yu
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Organic Fertilizer ◽  
Total Yield ◽  
Dry Weight ◽  
Scientific Basis ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Municipal Wastewater Treatment

Municipal sewage sludge has been increasingly produced in China with the development of municipal wastewater treatment. The use of sewage sludge as a fertilizer and soil amendment has resulted in high concentrations of heavy metals in the soil and food limiting its use. Controlling the pollution of heavy metals is the key factor to realize the safe utilization of sewage sludge. The present study was carried out to find scientific basis to the appropriate sludge applications in agriculture and forestry. Pilot experiments inEucalyptusforest showed that the total yield and nutrient amount ofP.hydridumwere significantly higher thanA.marorrhiza, the annual average yield in dry weight and total nutrient amount ofP.hydridumwere 21.32 thm-2and 1248.2 kghm-2, respectively, 9.18 times and 3.58 times that ofA.marorrhiza, soP.hydridumwere more suitable to be the converting plant from sludge to biochar or organic fertilizer. After plants treatment, the maturity of sludge increased significantly, water content and soluble heavy metals decreased obviously, so that the agricultural safety increased, and the all indicators were conformed to the sludge requirements for agricultural use. In addition, theEucalyptustrees grow well with a large spread of sewage sludge. Nutrient contents ofEucalyptusforestland soil increased and heavy metal contents of the topsoil beneath the sludge did not significantly increase.

Study on Rapid High-Efficient Composting Process of Sewage Sludge

2014 ◽  
Vol 955-959 ◽  
pp. 2940-2943
Author(s):  
Ke Zhao ◽  
Yu Zhang ◽  
Yu Ting Zhang ◽  
Ying Ying Yin
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Phosphorus Concentration ◽  
Municipal Wastewater Treatment ◽  
Composting Process ◽  
High Efficient

Based on the static composting process of municipal sewage sludge, the parameters of the treatment process were studied, including moisture, temperature, pH, organic matter, total phosphorus, the number of bacterial and GI(Germination Index). The decomposition of organic matter and phosphorus concentration were obvious and the amount of bacteria varied regularly. After the composting, pH, water contend, organic matter and GI all met Disposal of sludge from municipal wastewater treatment plant-Control standard for agricultural use.

scholarly journals Ammonia Emission from Sewage Sludge Incineration Process

2016 ◽  
Vol 23 (4) ◽  
pp. 665-675 ◽  
Author(s):  
Grzegorz Wielgosiński ◽  
Robert Cichowicz ◽  
Jacek Wiśniewski
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Combustion Process ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Ammonia Emission ◽  
Municipal Sewage Sludge ◽  
Sludge Incineration

Abstract In quantitative terms, sludge produced in the process of municipal wastewater treatment represents a small part of the total waste generated in municipal sources - its quantity represents only a few percent of the generated mass of municipal waste. However, the threats it brings, do not allow it to be neglected while designing the wastewater treatment process. At the same time, with increasing requirements regarding the quality of sewage discharged into the environment, there is an increase in the amount of sludge produced in wastewater treatment processes. In recent years, the share of thermal treatment of municipal sewage sludge has risen sharply - about 12 modern sludge incineration plants have been built and construction of new ones is considered. During more than a four-year operation of the sewage sludge incineration plant in the Combined Sewage Treatment Plant in Lodz (GOS) a large ammonia emission from the combustion process was observed. So, a decision was taken to examine this process. The paper presents results of ammonia emission from the combustion of sewage sludge from GOS as a function of temperature.

scholarly journals Reclamation of phosphogypsum deposition site in Wislinka near Gdansk with municipal sewage sludge

2019 ◽  
pp. 115-124
Author(s):  
Piotr Kowalik ◽  
Ewa Wojciechowska
Keyword(s):  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Land Application ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Municipal Wastewater Treatment ◽  
High Concentration ◽  
Enteric Parasites ◽  
Post Industrial

Utilization of sewage sludge is becoming one of the biggest environmental problems.One of the possible solutions is application of sludge to soil amendment. Sludge is a goodnatural fertilizer due to high concentration of organic carbon and nutrient elements (N, P).On the contrary, sewage sludge also contains heavy metals and may be contaminatedwith enteric parasites. Thus application of sludge to land could result in contamination ofsurface and ground waters and including trace metals in the food chains due tocontamination of plants grown on sludge amended soils. Hence land application of sludgeought to be carefully monitored and follow stringent regulations, which are often difficultto fulfil. However, if sludge is applied to reclamation of degraded post-industrial lands,waste deposition sites, landfills and formation of soil-like surface layer on soil-lessgrounds, the restrictions are not so stringent and easier to fulfil than in cases when cropsare grown on sludge amended soils.In the article reclamation of a phosphogypsum deposition site in Wislinka near Gdanskusing sewage sludge from a municipal wastewater treatment plant (WWTP) is discussed.Phosphogypsum deposit in Wislinka for many years has been one of the biggestenvironmental problems of the region, causing permanent complainants from localcommunities. Reclamation of the deposition site started in 1999 and has been continuedup till now. Covering of the slopes with a layer of sludge reduces dangerous wind erosionof dust and promotes plants succession.

Assessment of Environmental Quality of Soil Fertilized Grapefruit Trees with Municipal Sewage Sludge

2013 ◽  
Vol 671-674 ◽  
pp. 2736-2741
Author(s):  
Yin An Ming ◽  
Tao Tao
Keyword(s):  
Sewage Sludge ◽  
Environmental Quality ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Land Application ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Limiting Factor

To reuse municipal sewage sludge safely, experiment was carried out on grapefruit trees fertilized with composted sludge from Shiweitou Sewage Treatment Plant in Xiamen City of China, and a method was introduced of how to assess the environmental quality of grapefruit trees soil fertilized with sludge by Set Pair Analysis (SPA) model. The results showed that the soil in the surface layer (0-15cm) and the deeper layer (15-30cm) was less clean, and the environment of soil was not polluted. Thus it was feasible to use sludge as fruit fertilizer. The maximum service life of sludge for continuous land application was estimated by taking Cd as the limiting factor, which would provide scientific guide and technical support for safe land application of sludge.

scholarly journals Regulatory and technological prerequisites of the use of sewage sludge for the production of organic fertilizers

2020 ◽  
pp. 162-170
Author(s):  
R. Edgecock ◽  
V. V. Bratishko ◽  
I. V. Zinchenko ◽  
S. H. Karpus ◽  
D. O. Milko ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Municipal Wastewater ◽  
Raw Materials ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Raw Material ◽  
Organic Fertilizers ◽  
Mineral Fertilizers

Annotation Purpose. Summarize the regulatory and technological requirements for the production of organic (organo-mineral) fertilizers on the base of sewage sludge. Methods. Analysis and generalization of the requirements of regulatory documents on the management of organic waste and their use as raw materials for the production of organic fertilizers and soil improvers. Results. The current legislative, departmental and regulatory documentary base in Ukraine concerning the treatment of sediment resulting from biological sewage treatment at municipal wastewater treatment plants for its further use in agriculture as fertilizers is analysed. Indicators are identified and analysed to determine the possibility, feasibility, efficiency and scope of organic fertilizers produced using sewage sludge. The analysis of changes in the content of organic matter and total nitrogen in the sewage sludge during its storage at the sewage treatment plant sites is presented. The technological feasibility of using sludge of different shelf life in composting production has been determined. Conclusions 1. The regulatory framework of Ukraine contains a sufficiently complete list of indicators that should be met by organic raw materials (sewage sludge) for further use as organic fertilizers. Some of these indicators – bio security and heavy metals content – can be improved in the composting process of fertilizers. 2. Fresh sediment, as well as sediment accumulated in the last late autumn and winter periods, is of main value for use as a raw material in the production of organic fertilizers. 3. The use in the production of compost sludge stored on sludge sites for a period of half a year or more requires special control of the process of decontamination. In this case, it is advisable to use additional means of wastewater decontamination. Keywords: heavy metals, manure, humus, decontamination, composting, organic fertilizers, sewage sludge.

Sign in / Sign up

Export Citation Format

Share Document