scholarly journals Identification of Industrial Sewage Sludge based on Heavy Metal Profiles: A Case Study of Printing and Dyeing Industry

2021 ◽  
Author(s):  
Xufeng Zhang ◽  
Shuyu Chen ◽  
Fangting Ai ◽  
Limin Jin ◽  
Ningzheng Zhu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Eastern China ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Accuracy Rate ◽  
Metal Composition ◽  
Industrial Sewage ◽  
Industrial Sewage Sludge

Abstract The illegal disposal of industrial sewage sludge has caused serious environmental pollution. To develop identification techniques of industrial sewage sludge based on the characteristic fingerprints carried by sewage sludge itself is a promising method that is helpful to clarify the responsibility of illegal enterprises. In this study, heavy metal composition and speciation of sewage sludge from industries (including printing and dyeing industry and other industries) and municipal sewage treatment plant located in eastern China were determined and their performance of classification was evaluated by principal component analysis (PCA) and linear discrimination analysis (LDA). Results showed that heavy metal composition and speciation can be an effective tool for distinguishing sewage sludge between printing and dyeing industry and other industries, with an accuracy rate of 82.9% and 100%, respectively. Antimony (Sb) and zinc (Zn) are two characteristic heavy metals, which can be used to identity sewage sludge in printing and dyeing sub-industries with an accuracy rate of 90%. The combination of these three methods may be a precise and promising tool for identification of sewage sludge between industries and sub-industries. This study developed a potential method for tracing the industrial sources of sewage sludge and establishing the identification database of industrial sewage sludge, and provided technical support for the government to supervise the illegal dumping and disposal of industrial sewage sludge.

Distribution of Heavy Metal Fractions in Sewage Sludge from a Selected Municipal Sewage Treatment Plant

2021 ◽  
Vol 23 ◽  
pp. 369-383
Author(s):  
Ada Wojciula ◽  
Dariusz Boruszko ◽  
Amadeusz Kacprzak
Keyword(s):  
Heavy Metal ◽  
Sewage Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Chemical Form ◽  
Municipal Sewage ◽  
Fractional Analysis ◽  
Or In Agriculture ◽  
Municipal Sewage Treatment Plant

Sewage sludge used for reclamation of egraded areas or in agriculture must have a certain total heavy metal content, as required by law. In practice, however, it is important to carry out a fractional analysis of the elements contained in the sludge. This activity allows to determine the chemical form of a given metal, thanks to which it is possible to assess the assimilability of elements by plants. The study proved that the fraction of certain metals in sewage sludge can vary depending on the period studied. The combination of elements with other compounds in sludge from one treatment plant can vary from month to month. Once analysis has been carried out, it should not be the basis for assessing the bioavailability of metals if sludge from a given treatment plant were to be sampled several times a year.

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 Ecotoxicity Assessment of Stabilized Sewage Sludge from Municipal Sewage Treatment Plant

2016 ◽  
Vol 22 (3) ◽  
pp. 157-166 ◽  
Author(s):  
Elżbieta Włodarczyk ◽  
Marta Próba ◽  
Lidia Wolny
Keyword(s):  
Sewage Sludge ◽  
Sewage Treatment ◽  
Daphnia Pulex ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Water Extract ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Test Results ◽  
Municipal Sewage Treatment Plant

Abstract Aim of this study was to evaluate the ecotoxicity of municipal sewage sludge conditioned with polyelectrolytes, taken from selected sewage treatment plant. Using the bioindication analysis overall toxicity was assessed, which allows to know the total toxicity of all the harmful substances contained in sewage sludge, in many cases acting synergistically. To prepare a sample of sludge for the basic test, all analyses were performed with a ratio of liquid to solid of 10:1 (water extract). Daphnia pulex biological screening test was used. A dilution series of an water extract of sludge were prepared to include within its scope the lowest concentration that causes 100% effect and the highest producing less than 10% of the effect within a specified range of the assay. The results of the test were read after 24 and 48 hours. Based on the research and analysis of test results it proved that the sewage sludge conditioned with polyelectrolytes exhibit the characteristics of eco-toxic.

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 Technical, Energetic and Economic Optimization Analysis of Selection of Heat Source for Municipal Sewage Sludge Dryer

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 316
Author(s):  
Mariusz Tańczuk ◽  
Wojciech Kostowski
Keyword(s):  
Sewage Sludge ◽  
Heat Source ◽  
Thermal Power ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sensitivity Analyses ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Optimal Size ◽  
Promising Alternative

The treatment of growing production of municipal sewage sludge has become a significant global problem. Drying of digested sewage sludge is a promising alternative to sludge disposal at dumping sites. The research objective of this study was to find the optimal heat source for a sludge drying plant in a large municipal sewage treatment plant (people equivalent: 250,000). Two boundary heat supply cases were analyzed in the paper: cogeneration of heat and power (CHP) units, internal combustion (IC) engines fired with natural gas, and plant supplied with a gas boiler. The aim of the research was to find the optimal size of the cogeneration unit cooperating with the gas boiler as heat sources for a given drying plant case with the maximum net present (NPV) value as the objective function. The results of the conducted optimization show higher profitability of cases with larger cogeneration unit. For the basic assumptions, the maximum NPV is obtained for the largest analyzed CHP unit: 1300 kW of thermal power output. Sensitivity analyses show that the varying gas and electricity prices can relocate the NPV maximum towards smaller CHP sizes. A supplementary energy analysis shows that implementing larger CHP units yields a higher energy efficiency of the system, up to 0.52.

scholarly journals Sewage Sludge Management in a Sewage Treatment Plant

2019 ◽  
Vol 29 (3) ◽  
pp. 209-217
Author(s):  
Dariusz Królik ◽  
Przemysław Wypych ◽  
Jakub Kostecki
Keyword(s):  
Sewage Sludge ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Sludge Management ◽  
Methane Fermentation ◽  
Sewage Treatment Plants ◽  
Sewage Sludge Management

Abstract Sewage sludge produced in municipal sewage treatment plants, because of its physicochemical and sanitary properties, is a serious threat to the environment. In order to neutralize it, various methods of processing are used, which directly affect the quantity and quality of produced sewage sludge, which in the final stage can be used naturally. Properly managed sludge management is presented on the example of a sewage treatment plant, conducting the methane fermentation process with the production of biogas.

scholarly journals Effect of two-stage thermal disintegration on particle size distribution in sewage sludge

2013 ◽  
Vol 15 (3) ◽  
pp. 69-73 ◽  
Author(s):  
Anna M. Karczmarek ◽  
Jerzy Gaca
Keyword(s):  
Particle Size ◽  
Sewage Sludge ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Diffraction Method ◽  
Municipal Sewage ◽  
Two Stage ◽  
Second Stage

Abstract The effect of two-stage thermal disintegration of sewage sludge on the particle size distribution using laser diffraction method has been studied. The sludge was sampled from municipal sewage treatment plant after each stage of disintegration. The first stage of disintegration known as homogenization proceeds at temperature of 70-90°C and pressure of 3 bar, the second stage called thermal hydrolysis was performed at temperature of 160-170°C and pressure of 6 bar. It was found that the first stage of disintegration has the strongest impact on the reduction of the sludge particle size and changes in chemical properties. The maximum size of the particles from raw sewage before disintegration was 310 μm. After first stage of the process average size of the particles was 250 μm, and during the second stage it was reduced to 226 μm. Sludge disintegration degree (DDCOD) of 59% confirms high effectiveness of the process. We established that the redox potential (Eh) of sludge effluents was changed after each step of the studied process. Furthermore, chemical oxygen demand (COD) increases which leads to the conclusion that resizing of floccules is accompanied by hydrolysis.

INVESTIGATION INTO EMISSIONS OF GASEOUS POLLUTANTS DURING SEWAGE SLUDGE COMPOSTING WITH WOOD WASTE

2010 ◽  
Vol 18 (2) ◽  
pp. 128-136 ◽  
Author(s):  
Aušra Zigmontienė ◽  
Eglė Zuokaitė
Keyword(s):  
Sewage Sludge ◽  
Environmental Problem ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Deciduous Tree ◽  
Municipal Sewage ◽  
Composting Process ◽  
Ch4 And N2o ◽  
Sludge Composting

The main environmental problem of sewage sludge treatment and storing processes is unpleasant smell caused by emitted gases, such as NH3, H2S etc.; which are released during organic matter decomposition process. The second environmental problem is that during sewage sludge composting process global warming gases, such as CO2, CH4, and N2O are emitted, the emissions of these gases can be reduced by creating optimal composting conditions (C:N, aeration, pH and humidity) and by adding some additives (wood cuttings, shavings, zeolites, peat etc.) into sewage sludge. In our study we analyse the experimental results on CH4, NH3, H2S and VOC emissions during sewage sludge composting process. For this experiment, centrifuge‐dried sewage sludge from Vilnius City Municipal Sewage Treatment Plant were used. Used Ashen bark, oaken cuttings, aspen shavings, shredded deciduous tree branches. The composting process was performed in a compost site‐simulating facilities. Santrauka Nuoteku valymas, nuoteku dumblo apdorojimas ir saugojimas neišvengiamai kelia išsiskiriančiu duju, nemaloniu kvapu problema. Yrant organinems medžiagoms išsiskiria nemalonaus kvapo dujos (NH3, H2S ir kt.) ir šiltnamio efekta sukeliančios dujos (CO2, CH4, N2O). Biodegradacijos procesai vyksta gamtoje ir natūraliai, ir dirbtinai ‐ kompostuojant. Sudarant optimalias kompostavimo salygas (C:N, aeravimas, pH ir dregnis) bei naudojant priedus (medžio pjuvenas, drožles, ceolita, durpes ir kt.) galima mažinti dujiniu teršalu emisijas i aplinka. Nagrinejami nuoteku dumblo kompostavimo eksperimentu rezultatai tiriant CH4, NH3, H2S ir LOJ emisijas. Eksperimentui naudotas perteklinis Vilniaus komunaliniu nuoteku valymo irenginiu nuoteku dumblas, nusausintas centrifugomis. Kaip papildomos medžiagos ‐ uosio žieve, ažuolo pjuvenos, drebules drožles, smulkios lapuočiu medžiu šakos. Kompostuota kompostavimo aikštele imituojančiuose “irenginiuose”. Резюме Oчисткa сточных вод, а также дальнейшая обработка накапливаемого осадка связаны с выбросами газов с неприятным запахом. Газы, образующиеся в процессе деградации органических веществ, не только обладают специфическим запахом (NH3, H2S и др.), но и вызывают парниковый эффект (CO2, CH4, NOx). Известно, что процесс биодеградации может происходить как в естественных, так и в искусственных условиях, например, при компостировании. Используя примеси (опилки, щепки, цеолит, торф и др.), а также подбирая оптимальные условия для компостирования – C:N, аэрация, рН, влага, можно снизить выбросы газов в окружающую среду. В статье проанализированы результаты газовых выбросов – CH4, NH3, H2S, ЛОС – при компостировании осадков сточных вод. В эксперименте был использован избыточный осадок из очистных сооружений города Вильнюса после обработки на центрифугах. В качестве дополнительного материала (примесей) в процессе компостирования были использованы кора, опилки дуба, стружка осины, небольшие измельченные веточки. Процесс компостирования был имитирован в лабораторных условиях.

Sign in / Sign up

Export Citation Format

Share Document