Greenhouse gas emission from wastewater irrigated soils

Thangarajan, Ramya; Kunhikrishnan, Anitha; Seshadri, Balaji; Bolan, Nanthi; Naidu, Ravi

doi:10.2495/si120191

Cited by 10 publications

(2 citation statements)

References 23 publications

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“…Senyawa yang ada pada limbah cair tersebut berperan dalam pembentukan gas karbon dioksida dan metan di lingkungan. Hasil dari penelitian lain mendukung bahwa limbah cair berkontribusi terhadap terbentuknya gas rumah kaca (Thangarajan et al, 2012;USEPA, 2014;Campos et al, 2016 Gambar 2 menunjukkan bahwa emisi dari setiap tahapan proses penyamakan kulit menghasilkan emisi yang berbeda-beda. Pada Gambar 2 dapat dilihat bahwa emisi karbon terbesar dari penggunaan listrik dari setiap tahapan memiliki jumlah yang berbeda-beda.…”

Section: Hasil Dan Pembahasan Identifikasi Proses Penyamakan Kulitunclassified

Analisis Potensi Jejak Karbon Limbah Cair dan Listrik Pada Proses Penyamakan Kulit

2020

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Leather is a product obtained from the conversion process of raw skin/hide into leather. The process generate a number of wastes with a high pollutant content, especially waste water. The waste contributes to the formation of carbon emission. Awareness on environmental sustainability also requires the industry to improve its production system to make it more eco-friendly. Improvements will increase production and the industry reputation. Before making improvements to the production system, it is necessary to carry out an analysis related to the carbon emissions produced in producing a product. The objectives of this study were to calculate carbon emission (carbon footprint) that generates in the leather tannery process and to give alternative strategy for the environmental improvement. The research used primary data and secondary data. This research was carried out with the processes identification, carbon emission sources identification, an analysis of the carbon emission potential amount, and a study of strategies to minimize carbon formation in the tannery. The results of the analysis showed that electricity and wastewater were sources of carbon in the production process of leather. The total of carbon emission formed in the leather tanning process was 1,692.17 kg CO2 eq per batch, where wastewater contributed more than electricity. Further analysis showed that 1 m 2 of leather produced 8.08 kg CO2 eq of carbon. The strategies that can be taken to reduce carbon emissions are engineering processes, material substitution, and using eco-friendly materials.

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Section: Hasil Dan Pembahasan Identifikasi Proses Penyamakan Kulitunclassified

Analisis Potensi Jejak Karbon Limbah Cair dan Listrik Pada Proses Penyamakan Kulit

2020

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“…Wastewater reuse in agriculture is a common practice in developing countries (Thangarajan et al, 2012). Irrigation of sewage effluent to the agricultural land, yielded more crops, because sewage also supplied nitrogen, phosphorus, potassium and organic carbon to the soil.…”

Section: Phthalate Ester Occurrencementioning

confidence: 99%

Phthalate ester biodegradation in agricultural soil using exogenous bacterial consortium under fertilizer addition

Putri

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Phthalate esters (PAEs) have been classified as a priority contaminant due to their endocrine-disrupting properties and abundance in the environment. Previously, several PAE-degrading consortia were enriched from landfill soil. This study aimed to initially select a consortium with efficient degradation activity, to characterize based on degradation kinetics and community dynamics, and to evaluate bioaugmentation feasibility while maintaining activity through continuous transfer. It was obtained based on enriched consortium selection that LF-NK-DEHP could simultaneously degrade 92.9% 100 mg l-1 DBP and 63.4% 100 mg l-1 DEHP within seven days. Kinetic degradation revealed DBP degradation by LF-NK-DEHP to fit the modified Gompertz model (R2 = 0.92,� t1/2 =1.49 days, 500 mg l-1 DBP). On the other hand, DEHP degradation kinetics fit a zero-order kinetic model (R2 = 0.94, t1/2 =7.23 days, 500 mg l-1 DEHP). Community dynamics study revealed a significant correlation between the genus Microbacterium to DBP degradation and the genus Rhodococcus to DEHP degradation. Genus Pigmentiphaga was reported to correlate with both PAEs. In addition, continuous transfer of LF-NK-DEHP could maintain PAE degradation activity. Bioaugmentation of enriched consortium LF-NK-DEHP revealed insignificant degradation rate compared to natural attenuation. However, fertilizer addition was observed to improve the bioaugmentation performance. Bioaugmentation added with fertilizer could degrade 200 mg kg-1 DEHP up to 75.87% within 25 days while removing 200 mg kg-1 DBP altogether within three days. This was further confirmed through alleviation of PAE intermediates phytotoxicity. Upon completion of this research, new information was acquired, including methods to maintain enriched consortia degradation activity, potential novel PAE-degraders, and feasibility of bioaugmentation with exogenous enriched consortium for PAE bioremediation.

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Modeling the effect of wastewater irrigation on soil salinity using a SALT‐DNDC model

et al. 2021

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Wastewater has been widely reclaimed to irrigate crops where freshwater resources are scarce. Therefore, predicting the impacts of wastewater irrigation on soil moisture and soil salinity is critical for sustainable wastewater irrigation management. In this study, the denitrification-decomposition (DNDC) model was modified to couple wastewater irrigation with a water balance equation (SALT-DNDC). Secondly, the SALT-DNDC model was verified against the measured soil moisture, temperature, and nitrous oxide emission during the barley-growing season at Lethbridge, Alberta, Canada. Third, the SALT-DNDC model was used to predict the effects of one-time and split wastewater irrigation with varying quantity and quality on transpiration and soil salinity. The results showed that split irrigation of wastewater with an electrical conductivity of 6 dS m À1 reduced the peak soil salinity from 52-55 dS m À1 to a range of 8-20 dS m À1 , compared to one-time irrigation. Therefore, the split irrigation of wastewater could substantially reduce peak soil salinity. In this regard, optimal split wastewater irrigation with elevated salt concentration can limit soil salinity to acceptable salt tolerance levels for crop growth. The SALT-DNDC model can simulate dynamics of split irrigation wastewater and offers a new tool for assessing the effects of wastewater reuse on soil salinity.

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Greenhouse gas emission from wastewater irrigated soils

Cited by 10 publications

References 23 publications

Analisis Potensi Jejak Karbon Limbah Cair dan Listrik Pada Proses Penyamakan Kulit

Analisis Potensi Jejak Karbon Limbah Cair dan Listrik Pada Proses Penyamakan Kulit

Phthalate ester biodegradation in agricultural soil using exogenous bacterial consortium under fertilizer addition

Modeling the effect of wastewater irrigation on soil salinity using a SALT‐DNDC model

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