scholarly journals Composting Used as a Low Cost Method for Pathogen Elimination in Sewage Sludge in Mérida, Mexico

2016 ◽  
pp. 71-84
Keyword(s):  
Sewage Sludge ◽  
Low Cost ◽  
Pathogen Elimination

scholarly journals Composting Used as a Low Cost Method for Pathogen Elimination in Sewage Sludge in Mérida, Mexico

2013 ◽  
Vol 5 (7) ◽  
pp. 3150-3158 ◽  
Author(s):  
Dulce Cabañas-Vargas ◽  
Emilio. de los Ríos Ibarra ◽  
Juan. Mena-Salas ◽  
Diana Escalante-Réndiz ◽  
Rafael Rojas-Herrera
Keyword(s):  
Sewage Sludge ◽  
Low Cost ◽  
Pathogen Elimination

Low Cost Controlled Composting of Refuse and Sewage Sludge

1987 ◽  
Vol 19 (5-6) ◽  
pp. 839-845 ◽  
Author(s):  
J. T. Pereira-Neto ◽  
E. I. Stentiford ◽  
D. D. Mara
Keyword(s):  
Escherichia Coli ◽  
Sewage Sludge ◽  
Low Cost ◽  
Control Methods ◽  
Fixed Rate ◽  
The Past ◽  
Temperature Feedback ◽  
Forced Aeration ◽  
Domestic Refuse ◽  
Faecal Streptococci

The forced aeration static pile composting system was used to compost mixtures of domestic refuse and sewage sludge. Several different control methods have been evaluated over the past four years from simple, low cost fixed rate aeration timers to microcomputer based systems. Their relative merits are considered. In a compost pile using temperature feedback control the number of Escherichia coli were reduced from 107 org./g to less than 102 org./g. within 16 days. Faecal streptococci were reduced from 107 to less than 102 org./g within 30 days. The process consistently produced a good quality sanitised material under a range of control regimes.

VERMICOMPOSTING TECHNOLOGY FOR STABILIZING THE SEWAGE SLUDGE FROM RURAL WASTE WATER TREATMENT PLANTS

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
V. Lina Cardoso ◽  
C. Esperanza Ramírez ◽  
E. Violeta Escalante
Keyword(s):  
Rural Communities ◽  
Sewage Sludge ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Microbiological Quality ◽  
Fecal Coliforms ◽  
Nitrogen And Phosphorus ◽  
Sludge Management

There are problems associated with sludge management in small treatment plants (<10 L/s) located in rural communities, due to costly conventional technology for sludge stabilization. Many of these plants have only sludge drying beds. Mexican Institute of Water Technology has proposed developing suitable low-cost technologies, one of which is vermicomposting a biodegradation system using earthworms of the species Eisenia foetida (earthworm) which stabilize sludge and reduce its pathogenicity. The objective of this work is to present two case studies where vermicomposting technology has been applied in Mexico. The first study corresponds to a plant where 4.8 m3/month of sludge are produced; for these wastes, a vermicomposting system was built and installed. The second study is a treatment plant where 9 m3/month of sludge are produced; experimental tests were conducted with sludge and water hyacinth and a vermicomposting system was designed. The vermicomposts were analyzed using parameters defined by Mexican standards. In regards to stabilization, TVS was reduced by 38% and the microbiological quality of the vermicompost was Class A and B, with a reduction in fecal coliforms and Helminth eggs according to NOM-004-SEMARNAT-2002. A CRETI (Corrosivity, Reactivity, Explosivity, Toxicity and Ignitability) analysis (NOM-052-SEMARNAT-2005) was used to show that the process reduced the concentration of releasable sulfides. The agronomic quality of the vermicompost exhibited a high content of organic matter comparable to many organic manures and high content of nutrients such as nitrogen and phosphorus. It is concluded that it is possible to improve the conditions of sewage sludge management in small plants of rural communities with a minimum investment (less than $10,000.00 USD) and with a requirement of a minimum area of 60 to 70 m2 for a production of less than 9 m3/month of dehydrated sludge (80% humidity).

scholarly journals Regrowth and ornamental traits of bermudagrass fertilized with sewage sludge

2020 ◽  
Vol 26 (3) ◽  
pp. 390-398
Author(s):  
Philippe Solano Toledo Silva ◽  
Alessandro Reinaldo Zabotto ◽  
Patrick Luan Ferreira dos Santos ◽  
Matheus Vinícius Leal do Nascimento ◽  
Armando Reis Tavares ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Soil Solution ◽  
Digital Image Analysis ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Low Cost ◽  
Aesthetic Aspect ◽  
Positive Correlations ◽  
The Aesthetic ◽  
Ornamental Traits

Abstract The sewage sludge is a low-cost material and sustainable alternative to substitute chemical fertilizers on ornamental lawns and gardens. Thus, the objective was to evaluate the effects of the application of sewage sludge on the regrowth and ornamental traits of DiscoveryTM bermudagrass. The experiment was carried out during the fall/winter of 2019. The turf was removed and left the soil exposed for a new grass regrowth. The treatments applied were 0, 357, 714, 1,071 and 1,428 g m-2 sewage sludge spread evenly on the lawn in a single dose. The evaluations were carried out after 120 days and the soil solution (EC and NO3 -), Normalized difference vegetation index, root length, root + rhizome + stolon + leaves volume and digital image analysis were evaluated. The results showed that the increase of sewage sludge positively influenced the turfgrass development, both in the aesthetic aspect and on bermudagrass regrowth. The soil solution can show that the sludge increased the electrical conductivity and NO3- ions; however, it did not hinder the development of the lawn, even having positive correlations between these variables and the biometric evaluations of the plant. It is concluded that the dose of 1,428 g m-2 presented the best results for the evaluated characteristics, being the recommended one for use in the fertilization of bermudagrass DiscoveryTM.

scholarly journals The use of wastes (organic and inorganic) in land restoration in relation to their characteristics and cost

2019 ◽  
Vol 37 (5) ◽  
pp. 502-507 ◽  
Author(s):  
Ana Pérez-Gimeno ◽  
José Navarro-Pedreño ◽  
María Belén Almendro-Candel ◽  
Ignacio Gómez ◽  
Antonis A Zorpas
Keyword(s):  
Sewage Sludge ◽  
Low Cost ◽  
Organic Matter Content ◽  
Palm Tree ◽  
Land Restoration ◽  
Sludge Compost ◽  
Sewage Sludge Compost ◽  
Soil Rehabilitation ◽  
The Cost ◽  
Different Sources

The great extent of degraded soils in southeast Spain makes it necessary to carry out restoration and rehabilitation strategies. In addition, the great amount of wastes produced need to be properly managed. Several types of wastes and amendments (organic and inorganic) can be applied for soil rehabilitation and land restoration. When large areas must be restored several aspects should be considered, such as availability of the waste, its characteristics, and transport. This research focuses on the characterization and the cost of 12 waste types and amendments (such as sewage sludge compost, brown peat, black peat, fertilized peat, earthworm humus, straw hay, palm tree leaves, pine bark, exfoliated vermiculite, expanded perlite, limestone outcrops, and volcanic crushed stones) obtained from four different sources. All of them were characterized following the UNE standards for soil amendments and the cost was obtained as a mean value of four different sources. The results indicate a great variability of properties between organic and inorganic materials, as was expected. Depending on the type of restoration, the characteristics, and the cost, the materials can be selected for an adequate purpose. Sewage sludge compost is a good alternative for application in large areas related to its characteristics (organic matter content and nutrient availability) and low cost. For inorganic amendments, natural limestone outcrops were the low-cost alternative. The use of both wastes (composted sewage sludge and limestone raw materials) for soil rehabilitation can facilitate the reduction of landfill disposal and add value for these wastes. Moreover, the results are very useful for scientists and engineers who deal with the development of rehabilitation and restoration strategies.

scholarly journals Investigation on the adsorption of antibiotics from water by metal loaded sewage sludge biochar

2020 ◽  
Author(s):  
Xiulei Fan ◽  
Zheng Qian ◽  
Jiaqiang Liu ◽  
Nan Geng ◽  
Jun Hou ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Specific Surface ◽  
Pore Structure ◽  
Surface Area ◽  
Adsorption Process ◽  
Low Cost ◽  
Particle Diffusion ◽  
Surface Functionality ◽  
Intra Particle Diffusion ◽  
Adsorption Amount

Abstract Application of sewage sludge biochar as an adsorbent for antibiotics treatment has obtained special attention owning to their low cost and surface functionality. Three metal ions were selected to modify sewage sludge biochar through the pyrolysis with the metal loaded method. Fe loaded sewage sludge biochar (BC-Fe), Al loaded sewage sludge biochar (BC-Al) and Mn loaded sewage sludge biochar (BC-Mn) were characterized and used to explore the performance of adsorbing tetracycline (TC), sulfamethoxazole (SMZ) and amoxicillin (AMC). BC-Fe, BC-Al and BC-Mn possessed rougher surfaces, larger specific surface area and better pore structure. Intra-particle diffusion and Langmuir models were more suitable to describe the adsorption process. The maximum adsorption amount of TC, SMZ and AMC could reach 123.35, 99.01 and 109.89 mg/g by BC-Fe. Furthermore, the main mechanism of antibiotics adsorption by metal loaded sewage sludge biochars might be pores filling, Van der Waals forces and H-bonding. The study can not only solve the problems associated with the pollution of antibiotics from wastewater, but also reduced the treatment press of sewage sludge effectively.

scholarly journals Preparation of N-Doped Carbon Nanosheets from Sewage Sludge for Adsorption Studies of Cr(VI) from Aqueous Solution

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 265 ◽  
Author(s):  
Yi Wang ◽  
Weinan Zhao ◽  
Wanlan Zheng ◽  
Shuang Chen ◽  
Jinsheng Zhao
Keyword(s):  
Sewage Sludge ◽  
Porous Carbon ◽  
Removal Rate ◽  
Low Cost ◽  
Waste Water Treatment ◽  
Grand Challenge ◽  
Koh Activation ◽  
Thermal Regeneration ◽  
Carbon Nanosheets ◽  
Pore Size Distributions

Porous activated carbon with specific morphology and structure are of particular importance for waste water treatment, especially for the adsorption of toxic hexavalent chromium Cr(VI). However, the scalable and cheap production of such absorbents still suffer a grand challenge. Herein, a new type of N-doped nanosheet was innovatively prepared from easily available and low-cost sewage sludge via a facile and recyclable KOH activation method. The N-doped porous carbon nanosheets (N-SAC) produced by introduction of KOH and dicyandiamide, which performed favourable features for metal ions adsorption (93.2% for Cr(VI)) due to its high specific surface area, tuneable pore size distributions and good hydrophilicity. Additionally, the capacity also remained high after two cycles of adsorption by thermal regeneration, with 90.8% removal rate. The DFT calculation also approved that the doping of N could optimize the Mulliken charges distribution and improve the HOMO energy and improve the adsorption ability of N-SAC. This original proposal may inspire new possibility of creating porous carbon absorbents in a recyclable method.

scholarly journals Planned Application of Sewage Sludge Recirculates Nutrients to Agricultural Soil and Improves Growth of Okra (Abelmoschus esculentus (L.) Moench) Plants

2022 ◽  
Vol 14 (2) ◽  
pp. 740
Author(s):  
Ebrahem M. Eid ◽  
Kamal H. Shaltout ◽  
Saad A. M. Alamri ◽  
Sulaiman A. Alrumman ◽  
Mostafa A. Taher ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Crop Yields ◽  
Growth Parameters ◽  
Low Cost ◽  
Organic Fertilizer ◽  
Abelmoschus Esculentus ◽  
Total Biomass ◽  
Nutrient Contents ◽  
Absolute Growth ◽  
Safe Limits

The aim of this study was to investigate the feasibility of using sewage sludge (SS) biosolids as a low-cost soil fertilizer to improve soil characteristics and crop yields. Okra (Abelmoschus esculentus (L.) Moench) plants were grown in soil supplemented with different concentrations of SS (0, 10, 20, 30, 40, and 50 g/kg). The results showed that SS soil application led to improved soil quality with a 93% increase of organic matter (at SS dose of 10 g/kg), decreased pH (a reduction from 8.38 to 7.34), and enhanced macro- and micro- nutrient contents. The levels of all the investigated heavy metals (HMs; Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) in the postharvest SS-amended soil were within the prescribed safe limits. The application of SS to soil considerably enhanced the growth parameters of okra plants. Total biomass increased 13-fold and absolute growth rate increased 10-fold compared to plants grown in nonamended (control) soils. Among the applied SS doses, the 10 g/kg SS dose led to the highest values of the measured growth parameters, compared to those of plants grown in control soils. The induced growth at 10 g/kg SS was accompanied by a substantial increase in metal content in roots, stems, leaves, and fruits; however, all levels remained within safe limits. Consequently, the data presented in this study suggest that SS could be used as a sustainable organic fertilizer, also serving as an ecofriendly method of SS recycling.

CH4 Decomposition over Pyrolysis Residue of Sewage Sludge under Microwave Heating

2014 ◽  
Vol 953-954 ◽  
pp. 935-938
Author(s):  
Wen Yi Deng ◽  
Shu Gang Liu ◽  
Ya Xin Su
Keyword(s):  
Sewage Sludge ◽  
Microwave Heating ◽  
Low Cost ◽  
Methane Decomposition ◽  
Initial Activity ◽  
Microwave Assisted ◽  
Microwave Reactor ◽  
Pyrolysis Residue

The microwave-assisted CH4decomposition over a pyrolysis residue of sewage sludge (PRSS), which acted as a microwave receptor and a low-cost catalyst without further activation, was investigated in a multimode microwave reactor. The results indicated that the microwave heating of PRSS is heavily influenced by atmosphere. The PRSS temperature in CH4, N2and H2atmosphere follow the sequence ofTCH4<TH2<TN2. PRSS shows excellent initial activity for methane decomposition, but it deactivated very quickly. It was inferred that the fast deactivation of PRSS was mainly caused by temperature falling in CH4atmosphere.

Sign in / Sign up

Export Citation Format

Share Document