A new evaluation framework for the assessment of wastewater heat recovery potential coupled with wastewater reuse.

The integration of wastewater heat recovery (WWHR) and wastewater reuse offers a numerous advantage, making its application possible in various sectors. Nevertheless, this concept faced challenges to the identification of appropriate location. Existing research lacks comprehensive evaluation methods that encompass a various factor for effective decision-making.

An integrated AHP-PROMETHEE II ranking method to evaluate the resilience of sewer networks considering urban flood and ground collapse risks.

The aim of this study is to present criteria to evaluate the resilience of sewer networks related to ground collapse and urban flooding likely to occur in a specific region and then to determine the ranks of the sewer networks resilience of the selected regions to show the applicability of the analytic hierarchy process (AHP) and the Preference Ranking Organization Method for Enriching Evaluations (PROMETHEE II) method. Fourteen evaluation criteria representing resistance, reliability, redundancy, and response and recovery are presented and their weights are estimated by the AHP by asking questionnaires to 10 sewer experts, leading to the result that the sub-criteria of reliability showed the highest importance, followed by the length ratio of good pipelines (under resistance) and adequacy of the flow capacity of the bypass pipelines (under redundancy). Four separate small blocks of drainage areas (total area of 3.

Sustainability assessment of retrofitting alternatives for large and old wastewater treatment plants in Seoul.

Old wastewater treatment plants (WWTPs) must be upgraded to alleviate the problems associated with aging and reduce their total environmental impacts. To enhance the environmental sustainability in retrofitting large and old WWTPs, the decision-making process for selecting the most appropriate alternative is complicated. In this study, evaluation criteria were proposed to select the most sustainable alternatives for mid- to long-term retrofitting plans for a large WWTP with the treatment capacity of 1.

Prediction model of sparse autoencoder-based bidirectional LSTM for wastewater flow rate.

Sanitary sewer overflows caused by excessive rainfall derived infiltration and inflow is the major challenge currently faced by municipal administrations, and therefore, the ability to correctly predict the wastewater state of the sanitary sewage system in advance is especially significant. In this paper, we present the design of the Sparse Autoencoder-based Bidirectional long short-term memory (SAE-BLSTM) network model, a model built on Sparse Autoencoder (SAE) and Bidirectional long short-term memory (BLSTM) networks to predict the wastewater flow rate in a sanitary sewer system. This network model consists of a data preprocessing segment, the SAE network segment, and the BLSTM network segment.

Evaluation of sewer network resilience index under the perspective of ground collapse prevention.

Generally, when evaluating the resilience of infrastructure, the four properties of resilience (robustness, rapidity, resources, and redundancy, 4Rs) are widely considered. However, there is little research on the resilience assessment of sewer networks. Therefore, to establish a framework to evaluate sewer network resilience under the perspective of urban ground collapse prevention, this study considers the 13 second-level detailed indicators corresponding to the four first-level indicators (4Rs) based on literature reviews and experts' opinions.

Photocatalytic degradation of dissolved organic matter under ZnO-catalyzed artificial sunlight irradiation system.

This study investigates the photocatalytic degradation of dissolved organic matter (DOM) under ZnO-assisted artificial sunlight system at various conditions (ZnO dosage, pH, and the presence of Cl, SO, and HCO). The results show that the degradation of DOM follows a pseudo-first-order kinetics. Fluorescence excitation-emission matrices coupled with parallel factor (EEM-PARAFAC) analysis decomposes DOM into two fluorophores (C1 and C2).

gen. nov., sp. nov., isolated from a sea tidal flat and proposal of fam. nov.

A Gram-negative, moderately halophilic and facultatively aerobic bacterium, designated strain GTF13, was isolated from a sea tidal flat. Cells were curved rods and motile by a single polar flagellum showing catalase and oxidase activities. Growth was observed at 20-37 °C, pH 5.

Tungsten Trioxide (WO)-assisted Photocatalytic Degradation of Amoxicillin by Simulated Solar Irradiation.

This study investigates the photocatalytic degradation of amoxicillin (AMO) by simulated solar irradiation using WO as a catalyst. A three-factor-three-level Box-Behnken design (BBD) consisting of 30 experimental runs is employed with three independent variables: initial AMO concentration, catalyst dosage, and pH. The experimental results are analyzed in terms of AMO degradation and mineralization, the latter of which is measured using dissolved organic carbon (DOC).

Cupriavidus lacunae sp. nov., isolated from pond-side soil.

A Gram-stain negative, strictly aerobic, mesophilic bacterial strain, designated strain S23, was isolated from pond-side soil of an artificial pond in South Korea. Cells were observed to be peritrichously flagellated short rods showing positive oxidase and catalase activities. Growth of strain S23 was observed at 15-37 °C (optimum, 30 °C), pH 5.

Removal of humic and tannic acids by adsorption-coagulation combined systems with activated biochar.

Despite recent interest in transforming biomass into bio-oil and syngas, there is inadequate information on the compatibility of byproducts (e.g., biochar) with agriculture and water purification infrastructures.

Removal of acetaminophen and naproxen by combined coagulation and adsorption using biochar: influence of combined sewer overflow components.

The combined coagulation and adsorption of targeted acetaminophen and naproxen using activated biochar and aluminum sulfate were studied under various synthetic "combined sewer overflow" (CSO) conditions. The biochar demonstrated better adsorption performance for both acetaminophen and naproxen (removal, 94.1 and 97.

Determination of micropollutants in combined sewer overflows and their removal in a wastewater treatment plant (Seoul, South Korea).

The present study investigated the occurrence of 29 selected micropollutants such as endocrine disrupting compounds (EDCs) and pharmaceuticals and personal care products (PPCPs) in surface waters and wastewaters in Seoul (South Korea) during both dry and wet weather conditions. The study area was selected based on the lack of available information regarding the suspected contamination of rivers/creeks by EDCs and PPCPs in the Seoul region and the presence of a wastewater treatment plant (WWTP), which serves approximately 4.1 million inhabitants and has a design capacity of 1,297 × 10(3) m(3)/day.

Adsorption of selected endocrine disrupting compounds and pharmaceuticals on activated biochars.

Chemically activated biochar produced under oxygenated (O-biochar) and oxygen-free (N-biochar) conditions were characterized and the adsorption of endocrine disrupting compounds (EDCs): bisphenol A (BPA), atrazine (ATR), 17 α-ethinylestradiol (EE2), and pharmaceutical active compounds (PhACs); sulfamethoxazole (SMX), carbamazepine (CBM), diclofenac (DCF), ibuprofen (IBP) on both biochars and commercialized powdered activated carbon (PAC) were investigated. Characteristic analysis of adsorbents by solid-state nuclear magnetic resonance (NMR) was conducted to determine better understanding about the EDCs/PhACs adsorption. N-biochar consisted of higher polarity moieties with more alkyl (0-45 ppm), methoxyl (45-63 ppm), O-alkyl (63-108 ppm), and carboxyl carbon (165-187 ppm) content than other adsorbents, while aromaticity of O-biochar was higher than that of N-biochar.

Synergistic effect of hydrogen peroxide production and sonochemiluminescence under dual frequency ultrasound irradiation.

The synergistic effect of H(2)O(2) production and sonochemiluminescence (SCL) was studied under both orthogonal and opposite dual irradiation at the frequencies of 28, 584 and 970 kHz and at various acoustic powers. The largest reduction in H(2)O(2) production was observed under opposite dual irradiation at a 28/28 kHz frequency without considering the acoustic power levels. The largest enhancement was observed under dual irradiation at a frequency of 28/970 kHz.

Biological reduction of nitrate and perchlorate in brine water using up-flow packed bed reactors.

Denitrifying up-flow packed bed bioreactors (UPBRs) were evaluated for their capacity to simultaneously remove nitrate and perchlorate from ion exchange regenerant brines. A continuous-flow UPBR, which was inoculated with denitrifying bacteria obtained from a municipal wastewater plant, completely removed perchlorate as well as nitrate in conditions of up to 10% salinity. When nitrate and perchlorate were added to the UPBR, they were removed immediately.

Occurrence of endocrine disrupting compounds, pharmaceuticals, and personal care products in the Han River (Seoul, South Korea).

The occurrence of 31 selected endocrine disrupting compounds (EDCs) and pharmaceuticals and personal care products (PPCPs) in Korean surface waters was investigated. The area was selected since there is a lack of information in the Seoul area on the suspected contamination of rivers by micropollutants, although over 99% of drinking water is produced from surface waters in this area that has a population of approximately 15 million inhabitants. Samples were collected from upstream/downstream and effluent-dominated creeks along the Han River, Seoul (South Korea) and analyzed by liquid chromatography with tandem mass spectrometry (LC-MS/MS) with electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI).

Sonolysis of trichloroethylene and carbon tetrachloride in aqueous solution.

Herein, the ultrasonic degradation of trichloroethylene (TCE) and carbon tetrachloride (CT) are reported. The degradation rate for TCE increased by 27% with a decrease in the initial concentration of TCE from 10 to 1 mg L(-1), while the degradation rate of CT was not influenced significantly (<3%) at varying initial concentrations. The addition of t-BuOH, a hydroxyl radical scavenger, decreased the degradation rate of TCE to 22-33%.

Characterization of a microbial community capable of reducing perchlorate and nitrate in high salinity.

Denitrifying up-flow packed-bed bioreactors fed with perchlorate and nitrate allowed for the examination of the impact of a variety of salt conditions (up to 10% w/v NaCl) on the complete perchlorate and nitrate removal capacity of the reactor using activated sludge taken from a municipal wastewater treatment plant. Based on the evaluation of the microbial community in the bioreactor by cloning analysis, Clostridium sp. and a Rhodocyclaceae bacteria were identified as the dominant clones.