scholarly journals Improving sewage sludge compost process and quality by carbon sources addition

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Liqiang Meng ◽  
Weiguang Li ◽  
Shumei Zhang ◽  
Xiancheng Zhang ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Carbon Source ◽  
Carbon Sources ◽  
Ammonia Assimilation ◽  
Organic Matter Degradation ◽  
Compost Process ◽  
Compost Maturity ◽  
Sludge Compost ◽  
Nitrogen Conversion

AbstractIn present study, the effects of carbon sources on compost process and quality were evaluated in the lab-scale sewage sludge (SS) composting. The composting experiments were performed for 32 days in 5 L reactors. The results showed that carbon sources could change the nitrogen conversion and improve the compost quality. Especially, the readily degradable carbon source could promote organic matter degradation, improve nitrogen conversion process and accelerate compost maturation. The addition of glucose and sucrose could increase dissolved organic carbon, CO2 emission, dehydrogenase activity, nitrification and germination index during the SS composting. That's because glucose and sucrose could be quickly used by microbes as energy and carbon source substance to increase activity of microbes and ammonia assimilation. What's more, the NH3 emission was reduced by 26.9% and 32.1% in glucose and sucrose treatments, respectively. Therefore, the addition of readily degradable carbon source could reduce NH3 emission and improve compost maturity in the SS composting.

scholarly journals Fertility Impact of Separate and Combined Treatments with Biochar, Sewage Sludge Compost and Bacterial Inocula on Acidic Sandy Soil

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1612 ◽  
Author(s):  
Nikolett Uzinger ◽  
Tünde Takács ◽  
Tibor Szili-Kovács ◽  
László Radimszky ◽  
Anna Füzy ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Microbial Activity ◽  
Sandy Soil ◽  
Combined Treatments ◽  
Short Term ◽  
Root Colonisation ◽  
Sludge Compost ◽  
Sewage Sludge Compost ◽  
Combined Application

The short-term effects of processed waste materials: sewage sludge compost (up to 0.5%), biochar made of paper sludge and grain husk (BC) (up to 2%) combined with plant growth-promoting rhizobacterial (PGPR) inoculum, on the fertility of acidic sandy soil at 65% of field capacity were tested in a pot experiment in separate and combined treatments. The soil pH, organic matter content, total and plant-available nutrients, substrate-induced respiration, arbuscular mycorrhizal fungal (AMF) root colonisation parameters and maize (Zea mays L.) biomass were investigated in experiments lasting two months. The positive priming (21% organic matter loss) induced by BC alone was not observed after combined application. The combination of compost and PGPR with 1.5% BC resulted in 35% higher P and K availability due to greater microbial activity compared to BC alone. Only compost applied alone at 0.5% gave a 2.7 times increase in maize biomass. The highest microbial activity and lowest AMF colonisation were found in combined treatments. In the short term the combined application of BC, compost and PGPR did not result in higher fertility on the investigated soil. Further research is needed with a wider range of combined treatments on acidic sandy soil for better understanding of the process.

Comparison of dissolved organic matter from sewage sludge and sludge compost as electron shuttles for enhancing Fe(III) bioreduction

2009 ◽  
Vol 10 (4) ◽  
pp. 722-729 ◽  
Author(s):  
De-Yin Huang ◽  
Li Zhuang ◽  
Wei-Dong Cao ◽  
Wei Xu ◽  
Shun-Gui Zhou ◽  
...  
Keyword(s):  
Organic Matter ◽  
Sewage Sludge ◽  
Dissolved Organic Matter ◽  
Sludge Compost ◽  
Electron Shuttles

Additives aided composting of green waste: Effects on organic matter degradation, compost maturity, and quality of the finished compost

2012 ◽  
Vol 114 ◽  
pp. 382-388 ◽  
Author(s):  
Jagdish Gabhane ◽  
SPM. Prince William ◽  
Rajnikant Bidyadhar ◽  
Priya Bhilawe ◽  
Duraisamy Anand ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Matter Degradation ◽  
Compost Maturity ◽  
Green Waste

Changes in soil nutrient content, biological activity and CO2 emission rate as a result of low-dose municipal sewage sludge compost application

2020 ◽  
Author(s):  
Andrea Prof. Dr. Farsang ◽  
Katalin Dr. Perei ◽  
Attila Bodor ◽  
Zsuzsanna Dr. Ladányi ◽  
Katalin Csányi ◽  
...  
Keyword(s):  
Organic Matter ◽  
Enzyme Activity ◽  
Biological Activity ◽  
Sewage Sludge ◽  
Low Dose ◽  
Nutrient Content ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Sludge Compost ◽  
Sewage Sludge Compost

<p>Land application of sewage sludge is an increasingly popular means of the reuse of sewage sludge as it allows for recycling of valuable components, such as organic matter, N, P and other nutrients. Indeed, sewage sludge amendment to the soil modifies the soil’s physico-chemical properties, such as plant-available macro/micro nutrient contents, organic matter content. Additionally, sewage sludge applications can significantly increase the amount of microbial biomass in the soil and can also increase the soil enzyme activities. The aim of the present study is to investigate the impact of low-dose municipal sewage sludge compost amendment on the nutrient status and the biological activity in Chernozem soils. </p><p>The study area, located near Újkígyós (SE Hungary), is a 5.6 ha arable land, where 2.5 m<sup>3</sup>/ha/year municipal sewage compost has been regularly disposed since 2013. The pH (in H<sub>2</sub>O) and humus content of soils were measured according to standard procedures. The macronutrients P<sub>2</sub>O<sub>5</sub> and K<sub>2</sub>O were extracted using ammonium-lactate, while the nitrogen forms (NO<sub>2</sub><sup>-</sup> + NO<sub>3</sub><sup>-</sup> -N) were extracted with KCl-solution. The nutrient content was then determined by a flow injection analysis photometer. In order to determine the bacterial composition and enzyme activity of the soil samples, the number of living cells (CFUs), the catalase enzyme activity (CAT) and the dehydrogenase activity (DHA) were determined. The CO<sub>2</sub> emission was measured by an EGM-5 Portable High Precision CO<sub>2</sub> Meter in the field.  </p><p>The sewage sludge compost applied to Chernozem soils improved soil properties by adding slowly decomposing organic matter, abundant in plant macronutrients (N, K, P). The anaerobic microorganisms and the DHA enzyme activity in the anaerobic soil layers did not increase in the compost-amended soils. The aerobic microorganisms (CFUs) and CAT activity tended to be higher in treated soils compared to the non-amended (control) site, however not significantly. These results suggest that the soil biological activity is only moderately affected by the low-dose municipal sewage sludge compost applications. According to our field CO<sub>2</sub> emission measurements, the yearly application of the sewage sludge compost in a low-dose seemingly did not affect the soil respiration rates, compared to a local control site.</p><p>The research was funded by the ‘Thematic Network for the Sustainable Use of Re-sources – RING2017’ project (program code: EFOP-3.6.2-16-201700010).</p>

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