Sep 15, 2023 · Therefore, the types of microplastics in sewage sludge also differ. In terms of shape, fragments and fibers are the dominant microplastic shapes in most sewage sludge (Lares et al., 2018). In SS, other shapes of microplastics accounted for a high proportion. In terms of color, the color of microplastics in sewage sludge varies greatly.
Because of the complicated interaction of the sludge compost components, it makes the compost maturity degree judging system appear the non-linearity and uncertainty. According to the physical circumstances of sludge compost, a compost maturity degree modeling method based on wavelet neural network is presented.
Feb 2, 2018 · The objective of this study was to examine the feasibility of sewage sludge composting using a simple aeration method. Two consecutive composting trials (run A and run B) using Japanese sludge and woodchips (1:1, v/v) were conducted in cubic boxes (0.45 × 0.45 × 0.45 m3) made by plywood at Okayama University. Air was forced up through small holes perforated on two open-ended parallel PVC
Feb 1, 2022 · This study aimed to verify the potential of hyperthermophilic pretreatment composting (HPC) with HP at 120 °C for 30 min to improve sludge stabilization and to explore the key mechanism for enhancing sludge humification and improving organic nitrogen (N) retention.
Dec 22, 2020 · Conventional fertilization practices in agroecosystems concern the supply of bioavailable nutrients, such as mineral fertilizers. A consolidated alternative to restoring the long-term fertility of agricultural soils is their amendment with organic fertilizers. Soil amendment with biowaste compost or sewage sludge represents a sustainable strategy to avoid the landfilling of organic matter
Mar 1, 2014 · The properties of MSS were referred to MSS I (87.98% water content, 43.56% organic matter, and 4.26% total nitrogen), and the MSS reduction was 85% for the comprehensive recycling and 63% was
Apr 1, 2023 · One of the most pressing environmental problems worldwide is sewage sludge (SS) management. Every year, wastewater volume increases and thus, the amount of SS produced increases as well. The disposal of SS in landfills, as practiced in many countries, is not a sustainable solution. Instead, SS, rich in organic matter and other nutrients, can be used as an alternative soil additive or
AbfKlärV), only sewage sludge from mu-nicipal sewage treatment plants is usually suitable. Under the said ordinance, sewage sludge compost and mixtures also qualify as sewage sludge. Sewage sludge mixtures are mixtures of sewage sludge and other conformant substances, in accordance with Appendix 2 tables 11 and 12 of the Fertilizer
Oct 19, 2023 · Sewage sludge treatment and disposal remains a challenging problem. Composting of sewage sludges is gaining increasing attention due to its cost-effectiveness, operation convenience, advantages in lifecycle management, and low greenhouse gas emissions. Disadvantages, such as long reaction time, significant land area occupation requirement, potential risks of residual heavy metals, and emerging
Those results suggested that HM bioavailability in high-N addition soil was lower than that in low-N addition soil when applied with SSC. Overall, this study found that increasing soil N content can inhibit the bioavailability of HMs when applying SSC, providing suggestions for optimizing the trialability and risk assessment of SSC application.
Jul 24, 2020 · The objective of the study was to characterise co-composting dynamics and maturity of the end products of sewage sludge/ green waste mixtures. We analysed all initial substrates and co-composts, sampled at different composting times for studying (1) physicochemical parameters and (2) organic matter biodegradation and biotransformation using pyrolysis coupled to gas chromatography and mass
Oct 1, 2008 · Abstract. To analyze metabolically active thermophilic bacteria, a high-temperature direct viable count (HT-DVC) method was developed and applied to sewage sludge compost made by a hyperthermal
Jan 14, 2021 · 28 Citations. Metrics. In 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
Apr 6, 2024 · Sustainable management of sewage sludge is a challenge to the world. With a high content of organic material and essential nutrients, sewage sludge has been viewed as a cost-effective option for improving soil quality [1,2]. Its high concentration of organic matter and nutrients makes it logical to utilize sewage sludge as a fertilizer . Due to
Oct 1, 2023 · Pteris vittata L. (PV), an arsenic (As) hyperaccumulator, has a potential to extract As from As-polluted soils. Since available As in soils can be taken up by PV, As fraction variation associated rhizosphere environmental characteristics caused by municipal sewage sludge compost (MSSC) could provide possible to strengthen As phytoextraction by PV.