scholarly journals The Use of Phosphate Washing Sludge to Recover by Composting the Leachate from the Controlled Landfill

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1735
Author(s):  
Meriem Mobaligh ◽  
Abdelilah Meddich ◽  
Boujamaa Imziln ◽  
Khalid Fares
Keyword(s):  
Soil Surface ◽  
Alkaline Treatment ◽  
Household Waste ◽  
Agricultural Field ◽  
Runoff Water ◽  
Dump Site ◽  
Green Waste ◽  
Composting Process ◽  
Humification Parameters ◽  
Lime Sludge

The percolation of rainwater and runoff water through household waste in the dumpsite generally leads to an overabundance of leachate in Moroccan landfills, which is a source of soil, surface water and groundwater contamination. In order to ecologically solve the problem posed by the leachate in the dump site, to safeguard the environment and to contribute to sustainable development, we have carried out this study which aims to study the possibility of composting leachate with green waste and phosphate washing sludge. Various combinations with five substrates (leachate, green waste, sugar lime sludge, phosphate washing sludge and olive mill wastewater) in different proportions were used to build five windrows. A 24 h contact between the phosphate sludge or sugar lime sludge and the leachate took place prior to the addition of the green waste for the construction of the different windrows. This contact time ensured the absorption of a significant portion of the leachate and the disappearance of bad odor. A significant reduction was obtained with streptococci and mesophilic flora after 24 h of contact. The monitoring of the physicochemical parameters throughout the composting process showed that the temperature of the different windrows followed a good pace presenting all composting phases. Moisture, pH, C/N ratio and the percentage of degradation of the organic matter conformed to the quality standards of the compost. The combinations of the alkaline treatment and the composting process allowed a significant hygienization of the leachate. The results of the humification parameters and the E4/E6 ratio suggest that the composts obtained with phosphate sludge were the most stable and mature and can be used in the agricultural field or green space.

Dissolved Phosphorus Losses in Tile Drainage under Subirrigation

2006 ◽  
Vol 41 (1) ◽  
pp. 63-71 ◽  
Author(s):  
Nicolas Stämpfli ◽  
Chandra A. Madramootoo
Keyword(s):  
Water Table ◽  
Residual Effect ◽  
Surface Water Quality ◽  
Soil Surface ◽  
Quality Standard ◽  
Tile Drainage ◽  
Agricultural Field ◽  
Shallow Water Table ◽  
Dissolved Phosphorus ◽  
Water Table Control

Abstract Recent studies have shown subirrigation (SI) to be effective in reducing nitrate losses from agricultural tile drainage systems. A field study was conducted from 2001 to 2002 in southwestern Québec to evaluate the effect of SI on total dissolved phosphorus (TDP) losses in tile drainage. In an agricultural field with drains installed at a 1-m depth, a SI system with a design water table depth (WTD) of 0.6 m below the soil surface was compared with conventional free drainage (FD). Subirrigation increased drainage outflow volumes in the autumn, when drains were opened and water table control was interrupted for the winter in the SI plots. Outflows were otherwise similar for both treatments. Throughout the study, the TDP concentrations in tile drainage were significantly higher with SI than with FD for seven out of 17 of the sampling dates for which data could be analyzed statistically, and they were never found to be lower for plots under SI than for plots under FD. Of the seven dates for which the increase was significant, six fell in the period during which water table control was not implemented (27 September 2001 to 24 June 2002). Hence, it appears that SI tended to increase TDP concentrations compared with FD, and that it also had a residual effect between growing seasons. Almost one-third of all samples from the plots under SI exceeded Québec's surface water quality standard (0.03 mg TDP L-1), whereas concentrations in plots under FD were all below the standard. Possible causes of the increase in TDP concentrations in tile drainage with SI are high TDP concentrations found in the well water used for SI and a higher P solubility caused by the shallow water table.

Sediment content and chemical properties of water runoff on biocrusts in drylands

Biologia ◽  
2014 ◽  
Vol 69 (11) ◽  
Author(s):  
Roberto Lázaro ◽  
Juan Mora
Keyword(s):  
Dry Matter ◽  
Chemical Properties ◽  
Soil Surface ◽  
Water Erosion ◽  
Rainfall Simulation ◽  
Water Runoff ◽  
Protective Capacity ◽  
Runoff Water ◽  
Wide Range ◽  
The Impact

AbstractIn drylands, water erosion can be a process with important economic and ecological implications, and is very dependent on the soil surface cover. There is broad agreement that biocrusts protect the soil from erosion in a wide range of circumstances. However, there is little information available on the effect of rain and biocrust types on this protective capacity and there is particularly very little knowledge on the erosive effects of runoff on biocrusts, which are expected to be larger in larger drainage areas, on the resistance of biocrusts to the combined effect of raindrops plus runoff flow and on the solute mobilisation by runoff in biocrusts. To answer these questions, we performed 96 rainfall-simulation in situ factorial experiments, including two biocrust types (cyanobacteria and lichens), three rain types (42, 63 and 77 mm h−1, always 20 min rain), four plot lengths (1, 2, 3 and 4 m long) and four replicates. In each experiment, runoff volume was measured and a runoff sample was taken to determine (i) the amount of dry matter in runoff, (ii) the amount of organic matter among the dry matter, (iii) the electrical conductivity, pH and alkalinity in runoff water. The main findings were: biocrusts strongly protected soil against water erosion, even under the most erosive conditions, and the protection increased with the successional development. Biocrusts were very resistant to the impact of raindrops and also to runoff flow, although an emergent hypothesis arose: under the most erosive conditions, a threshold of erodibility could be reached at the cyanobacterial biocrust. The lichen crust also protected the soil against the removal of soil soluble substances. The development of a biocrust could change the chemical composition of the solutes in runoff.

Plot-scale wash-off of Cesium-137 and Strontium-90 after three decades since the Chernobyl accident

2020 ◽  
Author(s):  
Yoshifumi Wakiyama ◽  
Yasunori Igarashi ◽  
Yuichi Onda ◽  
Dmitry Samoilov ◽  
Hlib Lisovy ◽  
...  
Keyword(s):  
Surface Runoff ◽  
Soil Surface ◽  
Water Repellency ◽  
Sediment Discharge ◽  
Exclusion Zone ◽  
Runoff Water ◽  
Wild Fire ◽  
Strontium 90 ◽  
Cesium 137 ◽  
Level Sensor

<p>Long-term behaviors of Cesium-137 (<sup>137</sup>Cs) and Strontium-90 (<sup>90</sup>Sr) have been of great interest in Chernobyl and its downstream area. This study presents plot-scale observations of <sup>137</sup>Cs and <sup>90</sup>Sr wash-off in the Chernobyl exclusion zone since 2018 to date. Runoff plots were established on a pine forest in the Kopachi area (PF-KP), an abandoned farmland in the Korogod area (AF-KR) and a post wild fire territory in the Red Forest (WF-RF) in December 2017. Each runoff plot consists of eroding surface of 22.13 m length and 5 m width, a 30° V-notch weir with water level sensor for monitoring surface runoff and tanks for collecting runoff water and sediments. Since February 2018, runoff water and sediment samples trapped in the weir and tanks have been collected after rainfall events and analyzed for particulate <sup>137</sup>Cs concentration, dissolved <sup>137</sup>Cs concentration, and dissolved <sup>90</sup>Sr concentration. Analyses of samples in 2, 4, and 3 wash-off events were completed for PF-KP, AF-KR, and WF-RF, respectively. The ash/litter on soil surface, soil of 0-1 cm depth, soil of 1-2 cm depth, and soil of 2-3 cm depth were sampled with a scraper plate and subject to measurements of <sup>137</sup>Cs and <sup>90</sup>Sr concentrations.  Total volume of surface runoff from PF-KP, AF-KR, and WF-RF were 0.97, 0.73, and 3.2 mm, respectively. Total sediment discharge from PF-KP, AF-KR, and WF-RF were 0.29, 0.015, 1.7 g m<sup>-2</sup>, respectively. The runoff and sediment discharge from PF-KP and WF-RF were mainly observed in summer and attributed to severe water repellency of the surface soils. Total particulate <sup>137</sup>Cs wash-off from PF-KP, AF-KR, and WF-RF were 51, 0.082, 270 Bq m<sup>-2</sup>, respectively. Total dissolved <sup>137</sup>Cs wash-off from PF-KP, AF-KR, and WF-RF were 7.4, 0.024, 9.8 Bq m<sup>-2</sup>, respectively. Total dissolved <sup>90</sup>Sr wash-off from PF-KP, AF-KR, and WF-RF were 55, 0.31, 230 Bq m<sup>-2</sup>, respectively.  These results indicate that wild fire enhances surface runoff and sediment yield and result in greater wash-off of <sup>137</sup>Cs and <sup>90</sup>Sr. In comparisons between PF-KP and WF-RF, apparent Kd value for <sup>137</sup>Cs at WF-RF was higher than at PF-KP. Ratio of dissolved <sup>137</sup>Cs and <sup>90</sup>Sr concentration to those in ash/litter layer at PF-KP was lower than those of WF-RF. The dissolution of these radionuclides into runoff water appeared to be restrained in the post wild-fire site.</p>

scholarly journals Ozone aeration impact on the maturation phase in the process of green waste composting

2018 ◽  
Vol 10 ◽  
pp. 01005 ◽  
Author(s):  
Maciej Gliniak ◽  
Łukasz Grabowski ◽  
Daria Polek
Keyword(s):  
Organic Matter ◽  
Organic Matter Content ◽  
Matter Content ◽  
Maturation Time ◽  
Green Waste ◽  
Maturation Phase ◽  
Composting Process ◽  
Stabilization Phase

The paper presents work results on optimization of stabilization phase in the biomass composting process. In these studies, it was examined the influence of two doses of ozone (10 and 20 mgO3·dm-3) in the air used for aeration of stabilization. The results showed the ability to reduce compost maturation time by more than 50%. Application of these ozone doses resulted in a reduction of organic matter content in the stabilizer by 30 to 60%, while reduction of moisture in the material by 20%.

scholarly journals The effects of Insects on the Physicochemical Characteristics During Composting

2019 ◽  
pp. 2426-2432
Author(s):  
Sayran Yousif Jalal ◽  
Nihal Suhail Hanna ◽  
Yahya Ahmed Shekha
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Solid Waste ◽  
Organic Waste ◽  
Organic Fertilizer ◽  
Organic Matter Content ◽  
Physicochemical Characteristics ◽  
Household Waste ◽  
Organic Carbon Content ◽  
Composting Process

     Insects have a vital role in solid waste composting process. Insects are detritus feeders that enhance changing the physical and chemical properties of decomposed materials during composting processes. This behavior makes insects excellent organisms in recycling of organic matter. The present study assesses the success of insects’ population in relation with the degradation of solid waste.  The study was carried out in the glass house facility of the College of Science, Salahaddin University in Erbil City, Kurdistan region of Iraq, using household organic waste. During composting process, three stages of lifecycle of insects were observed and recorded. The total number of insects reached to 1268 individuals, belonging to the orders Coleoptera and Diptera, class Insects. Diptera individuals were the most abundant insects with 95.4% of the total belonged to four families (Muscidae, Calliphoridae, Ulidiidae and Milichiidae). Coleoptera individuals represented 4.6% of the total number, belonging to three families (Promecheilidae, Staphylinidae and Salpingidae). The measured physicochemical characteristics of the compost included: pH, EC, moisture, total organic carbon, total nitrogen, total phosphorous and organic matter. The pH value of the composts ranged from 7.79 to 7.97. Organic carbon content and organic matter content ranged from 20.16 to 26.99 % and 34.67 to 46.23 %, respectively. It can concluded that household waste compost is not just a waste but has the potential to be transformed into a good quality organic fertilizer through composting. Composting can convert solid organic waste into a valuable added material.

POTENSI KOMPOSTING SAMPAH SKALA RUMAH TANGGA UNTUK MEREDUKSI TIMBULAN SAMPAH (Pilot Proyek di Perumahan Puspiptek Serpong) = Potential Scale of Household Waste Composting to Reduce Waste Generation (Pilot Project in Puspiptek Serpong Residence)

2016 ◽  
Vol 14 (1) ◽  
pp. 17
Author(s):  
Firman L. Sahawan
Keyword(s):  
Organic Waste ◽  
Pilot Project ◽  
Household Waste ◽  
Waste Generation ◽  
Composting Process ◽  
Potential Scale ◽  
Mature Compost ◽  
Aerobic Decomposition ◽  
One Year

The position of composting household waste in terms of waste management at the macro level is very important, because household acts as a source of waste. When organic waste at household can be composted, then the waste transported to landfill will be reduced, so that the transportation costs of transporting waste involved is reduced, beside can extend the life of the landfill. To determine the effectiveness of household-scale composting process using aerobic composter, its potential in reducing household waste generation, as well as the quality of the resulting compost, we conducted this study. The results showed that: the composting process using "composter" aerobics can be run well and fairly effective, as well as describing the process of aerobic decomposition. It is heavily influenced by the composting process of assistance given to environment volunteers. Potential production of compost that can be generated by each family in one year as much as 43 kg, for families who have 1 (one) composter and 86 kg for a family that has 2 (two) composters. While the potential to reduce household waste generation by 21%, to which has 1 composter, and 42% to which has 2 composters. The compost production has good quality because it is free from microbial contaminants (pathogens), meet the requirements of mature compost and generally meet the parameters required by Permentan No 70 of 2011 or SNI compost of 2004. Keywords: composting, household waste, composter and reduction of waste generationAbstrakPosisi pengomposan sampah rumah tangga dalam kerangka pengelolaan sampah secara makro sangat penting, karena rumah tangga berperan sebagai sumber sampah. Apabila sampah organik di rumah tanggga dapat dikomposkan, maka sampah yang diangkut ke TPA menjadi berkurang, sehingga biaya transportasi pengangkutan sampah ikut berkurang, selain dapat memperpanjang umur TPA. Untuk mengetahui efektifitas proses komposting skala rumah tangga menggunakan komposter aerobik, potensinya dalam mereduksi timbulan sampah rumah tangga, serta kualitas kompos yang dihasilkan, maka dilakukanlah penelitian ini. Hasil penelitian menunjukkan bahwa: proses pengomposan menggunakan ”komposter” aerobik dapat berjalan dengan baik dan cukup efektif, serta menggambarkan proses dekomposisi secara aerobik. Hal tersebut sangat dipengaruhi oleh proses pendampingan pembuatan kompos yang tetap diberikan kepada kader lingkungan. Potensi produksi kompos yang dapat dihasilkan oleh masing-masing keluarga dalam 1 tahun sebanyak 43 kg, untuk keluarga yang memiliki 1 buah komposter dan 86 kg untuk keluarga yang memiliki 2 buah komposter. Sedangkan potensinya untuk mereduksi timbulan sampah rumah tangga sebesar 21%, untuk yang memiliki 1 komposter, dan 42% untuk yang memiliki 2 komposter. Produk kompos yang dihasilkan berkualitas baik karena bebas dari mikroba kontaminan (patogen),memenuhi persyaratan kompos matang dan secara umum memenuhi parameter-parameter yang dipersyaratkan oleh Permentan No. 70 Tahun 2011 atau SNI kompos Tahun 2004.Kata kunci: Komposting, sampah rumah tangga, komposter dan reduksi timbulan sampah

scholarly journals Diurnal fluxes of HONO above a crop rotation

2017 ◽  
Vol 17 (11) ◽  
pp. 6907-6923 ◽  
Author(s):  
Sebastian Laufs ◽  
Mathieu Cazaunau ◽  
Patrick Stella ◽  
Ralf Kurtenbach ◽  
Pierre Cellier ◽  
...  
Keyword(s):  
Soil Temperature ◽  
Uv Light ◽  
Soil Surface ◽  
Bare Soil ◽  
Agricultural Field ◽  
Long Wavelength ◽  
Photolysis Frequency ◽  
Different Seasons ◽  
Additional Influence ◽  
Absorption Photometer

Abstract. Nitrous acid (HONO) fluxes were measured above an agricultural field site near Paris during different seasons. Above bare soil, different crops were measured using the aerodynamic gradient (AG) method. Two LOPAPs (LOng Path Absorption Photometer) were used to determine the HONO gradients between two heights. During daytime mainly positive HONO fluxes were observed, which showed strong correlation with the product of the NO2 concentration and the long wavelength UV light intensity, expressed by the photolysis frequency J(NO2). These results are consistent with HONO formation by photosensitized heterogeneous conversion of NO2 on soil surfaces as observed in recent laboratory studies. An additional influence of the soil temperature on the HONO flux can be explained by the temperature-dependent HONO adsorption on the soil surface. A parameterization of the HONO flux at this location with NO2 concentration, J(NO2), soil temperature and humidity fits reasonably well all flux observations at this location.

Effect of Extractable Soil Surface Phosphorus on Runoff Water Quality

1993 ◽  
Vol 36 (4) ◽  
pp. 1079-1085 ◽  
Author(s):  
T. C. Daniel ◽  
D. R. Edwards ◽  
A. N. Sharpley
Keyword(s):  
Water Quality ◽  
Soil Surface ◽  
Runoff Water ◽  
Extractable Soil
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