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sewage; sewage treatment, etc ; Ottowia; denitrification; nitrogen; redox potential; sludge; China; Show all 8 Subjects
Abstract:
... To achieve advanced nitrogen removal from actual municipal sewage, a novel multistage anoxic/aerobic process with sludge regeneration zone (R-MAO) was developed. The reactor was used to treat actual domestic sewage and the nitrogen removal capacity of the sludge regeneration zone (R zone) was investigated during the long-term operation. The best performance was obtained at the R zone's Oxidation-R ...
sewage sludge, etc ; clay; research; slaughterhouses; soil; tillage; Show all 6 Subjects
Abstract:
... This manuscript describes the natural soil amendments used in agriculture, which are divided into three groups: organic, organic-mineral, and mineral amendments. It also describes less popular agents, such as clay minerals, sewage sludge, and amendments based on slaughterhouse wastes. A specific group of organic amendments are algae-base amendments which are becoming more and more popular. The soi ...
... Oily sewage discharged from indiscriminate industrial and frequent oil spills have become a serious global problem. There is an urgent need to separate stable oil/water emulsions by efficient and environmentally friendly methods. Membrane separation technology has the advantages of low energy consumption and low cost, thus is an effective solution to the problems of oily wastewater. However, the m ...
... Biogenic hydrogen sulfide is an odorous, toxic and corrosive gas released from sewage in sewers. To control sulfide generation and emission, nitrate is extensively applied in sewer systems for decades. However, the unexpected sulfide rebound after nitrate addition is being questioned in recent studies. Possible reasons for the sulfide rebounds have been studied, but the mechanism is still unclear, ...
... A typical anthropogenically disturbed urban river polluted by a combination of conventional pollutants (nitrogen and phosphorus pollution) and heavy metals was investigated along a 238 km stretch. Changes in the bacterial community were evaluated using high-throughput sequencing, and the relationships between bacteria, heavy metals, and conventional pollutants were investigated. There was large sp ...
... A novel strain, Nitratireductor sp. GZWM139 capable of efficient removal of SMX was isolated from mariculture sewage, and Nitratireductor was reported to conduct the removal of antibiotics for the first time. Strain GZWM139 exhibited desirable adaptations to environmental factors with SMX removal efficiencies more than 90 % at temperatures of 28–38 °C, pH values of 4.5–8.5, salinities of 20–30 ‰, ...
sewage sludge, etc ; carbon dioxide; electricity; energy; environmental impact; gasification; mathematical models; power plants; renewable energy sources; temperature; thermodynamics; Show all 11 Subjects
Abstract:
... One of the primary objectives of the negative carbon dioxide gas power plant (nCO₂PP) is to develop an innovative technology confirming the possibility of the use of sewage sludge to produce electricity while having a positive impact on the environment. In this paper, a mathematical model is presented to estimate thermodynamic parameters of the system in relation to the gasification process and ch ...
sewage sludge, etc ; air pollution; air pollution control; aluminum silicates; chlorides; compression strength; glass; heavy metals; incinerators; liquids; shrinkage; slags; sulfates; Show all 13 Subjects
Abstract:
... The air pollution control (APC) residues from the sewage sludge incinerators are harmful to the environment due to their relatively rich soluble salts and heavy metal content. In this paper, the APC residues were pre-treated by water washing at the different liquid to solid ratios (L/S), and a ternary contour diagram was introduced to optimize the composition of slag, waste glass powders and APC r ...
sewage sludge, etc ; Fourier transform infrared spectroscopy; Methanobacterium; Methanosarcina; anaerobic digestion; community structure; methane; methane production; methanogens; microalgae; microbial communities; thermogravimetry; China; Show all 13 Subjects
Abstract:
... To improve methane production from sewage sludge (SS), co-digestion of SS and microalgae (MA) was studied and the application of thermo-alkaline pretreatment to MA was evaluated. The results showed that thermo-alkaline pretreatment at 90°C for 120 min on MA was the optimum pretreatment condition. Furthermore, when the volatile solids (VS) ratio of SS and MA was 1:2, the methane yield reached maxim ...
sewage sludge, etc ; Paenibacillus; bacteria; enzyme activity; enzymes; experimental design; heat tolerance; kinetics; odors; oxidation; pH; quinones; specific growth rate; sulfates; sulfides; sulfites; sulfur; China; Show all 18 Subjects
Abstract:
... The sulfur-containing odor emitted from sludge composting could be controlled by sulfide oxidizing bacteria, yet mesophilic strains show inactivation during the thermophilic stage of composting. Aimed to investigate and characterize the thermotolerant bacterium that could oxidize sulfide into sulfate, a heterotrophic strain was isolated from sewage sludge composting and identified as Paenibacillus ...
sewage, etc ; agricultural soils; corn; data collection; food safety; human health; irrigation; models; pollution; prediction; risk; risk assessment; soil pH; toxicity; wheat; China; Yellow River; Show all 17 Subjects
Abstract:
... Cadmium (Cd) pollution of agricultural soil is of public concern due to its high potential toxicity and mobility. This study aimed to reveal the risk of Cd accumulation in soil and wheat/maize systems, with a specific focus on the source-specific ecological risk, human health risk and Cd enrichment model. For this we investigated more than 6100 paired soil and grain samples with 216 datasets inclu ...
sewage treatment, etc ; environment; evolution; fertilizer application; food consumption; greywater; humans; livestock; nitrogen; nutrient use efficiency; river deltas; water footprint; water pollution; water quality; Yangtze River; Show all 15 Subjects
Abstract:
... Anthropogenic reactive nitrogen (Nr) emissions from agricultural production and food consumption in city clusters have caused water quality degradation and scarcity. In this study, anthropogenic Nr emissions to the water environment were quantitatively evaluated in the Yangtze River Delta city cluster from 2011 to 2020 using coupling nitrogen (N) flow analysis and the grey water footprint (GWF) me ...
... Synthetic fibers released from sewage sludge and tire particles released from traffic are among the most common types of microplastics in soil. In soil, microplastics may interact with chemicals, such as plant protection products used in agriculture. Most studies on the interactions of microplastics and chemicals focused on aquatic environments and only few addressed soil arthropods. To increase t ...
sewage sludge, etc ; Actinobacteria; Proteobacteria; bacterial communities; biochar; community structure; dissolved organic matter; fluorescence; fungal communities; heavy metals; hydrochars; hydrolysis; hydrothermal carbonization; soil; soil amendments; soil microorganisms; temperature; total dissolved nitrogen; Show all 18 Subjects
Abstract:
... Sewage sludge contains a large number of nutrients and dangerous substances, when sludge was processed into sludge hydrochar that was added to the soil, which not only solve the problem of sludge disposal, but also amend the soil and fix pollutants in the soil. However, it was lack of report on the effect of the sludge hydrochar on soil compositions and soil microorganism community structures unti ...
sewage; sewage systems; sewage treatment, etc ; Japan; cold; rain; snow; water quantity; water treatment; winter; Show all 10 Subjects
Abstract:
... In this study, the precipitation effects because of the weather variations and receiving water volumes collected by the sewage treatment plants were examined to obtain the knowledge required for improving the construction of the ideal sewage plants located in cool climates. The weather and water quantity data were acquired from the Meteorological Society of Japan and the Mombetsu Aqua Center, resp ...
sewage; sewage sludge; sewage treatment, etc ; aluminum; chemical analysis; data collection; environment; phosphorus fertilizers; prediction; regression analysis; Show all 10 Subjects
Abstract:
... Prediction of the relative phosphorus (P) fertiliser value of bio-based fertiliser products is agronomically important, but previous attempts to develop prediction models have often failed due to the high chemical complexity of bio-based fertilisers and the limited number of products included in analyses. In this study, regression models for prediction were developed using independently produced d ...
sewage; sewage sludge, etc ; biogas; cellulose; methane; pH; paper; temperature; Show all 8 Subjects
Abstract:
... Technologies with resource recovery alternatives are suggested in metropolitan settings. Anaerobic digesters (AD) are the most common. The use of microcrystalline cellulose and a variety of grocery products as control feed increases the cost of bio methane potential analysis (BMP). This limits its replication, especially in developing countries. As a result, this study looks into the use of milled ...
sewage; sewage sludge, etc ; ash content; biochar; carbon; mineralization; oxidation; pyrolysis; Show all 8 Subjects
Abstract:
... The aim of this study was to determine the effect of abiotic aging of sewage sludge (SSL)-derived biochars on their physicochemical properties and in consequence on their stability. Biochars produced at 500 or 700 °C from SSLs with a different composition and properties were incubated at different temperatures (−20, 4, 20, 60, and 90 °C) for 6 and 12 months. Pristine and aged biochars were charact ...
sewage; sewage sludge; sewage treatment, etc ; bioavailability; heavy metals; land application; organic matter; plant growth; pollution; research; risk; soil; toxicity; Algeria; Show all 14 Subjects
Abstract:
... The agricultural spreading of dehydrated sewage sludge from urban sewage treatment plants is economically profitable provided that the soil agronomic quality and the absence of contamination, in particular of heavy metals, are maintained. We evaluated the variability of sludge between five treatment plants in northern Algeria. We determined parameters that account for their agronomic quality and t ...
sewage; sewage treatment, etc ; infiltration rate; statistics; stormwater; sustainable development; water quality; China; Show all 8 Subjects
Abstract:
... Urban clean water is an important component of water resources management and is essential for achieving the United Nations Sustainable Development Goal. The Chinese government has attached great importance to urban sewage treatment and clean water resources. Unfortunately, the urban water quality has not shown a corresponding improvement with the increasing investment in the construction of urban ...