Abstract：
:Flocculation can remove large amounts of nitrogen and phosphorus from wastewater, and the resulting nitrogen- and phosphorus-rich floc can be used to produce organic fertilizer. For biogas slurries containing high levels of nitrogen and phosphorus, ordinary flocculants can no longer meet the flocculation requirements. In this study, to fully utilize the advantages of the two flocculants and achieve efficient removal rates of nitrogen and phosphorus from a biogas slurry, chitosan (CTS) and polyaluminum chloride (PAC) were used as a composite flocculation agent to flocculate pig biogas slurries. The response surface method was used to study the effect of PAC added (PACadded) to the composite flocculant (CF), composite flocculant added (CFadded) to the biogas slurry and the pH on flocculation performance, and optimize these three parameters. In the tests, when the PACadded was 6.79 g·100 mL-1CF, the CFadded was 20.05 mL·L-1 biogas slurry and the pH was 7.50, the flocculation performance was the best, with an absorbance of 0.132 at a wavelength of 420 nm. The total phosphorus (TP) concentration was reduced from 214.10 mg·L-1 to 1.38 mg·L-1 for a removal rate of 99.4%. The total ammonia nitrogen (TAN) concentration was reduced from 1568.25 mg·L-1 to 150.27 mg·L-1 for a removal rate of 90.4%. The results showed that the CF could form larger flocs, and had greater adsorption capacity and more stable flocculation performance than ordinary flocculants. Furthermore, the CF could exhibit better chelation, electrical neutralization and bridge adsorption.
journal_name
Int J Environ Res Public Healthauthors
Li Y,Li L,Yasser Farouk R,Wang Ydoi
10.3390/ijerph16060996subject
Has Abstractpub_date
2019-03-19 00:00:00issue
6eissn
1661-7827issn
1660-4601pii
ijerph16060996journal_volume
16pub_type
杂志文章abstract：BACKGROUND:Sexually transmitted diseases (STDs) remain one of the most important health challenges in not only developing countries but also developed countries. Discussing STDs in the Saudi society is considered taboo, as social factors and ethics give rise to many obstacles. This study evaluates the knowledge of STDs...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17061872
更新日期：2020-03-13 00:00:00
abstract：:Acrylamide (ACR) is a water-soluble chemical used in different industrial and laboratory processes. ACR monomer is neurotoxic in humans and laboratory animals. Subchronic exposure to this chemical causes neuropathies, hands and feet numbness, gait abnormalities, muscle weakness, ataxia, skin and in some cases, cerebel...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章,评审
doi：10.3390/ijerph10093843
更新日期：2013-08-27 00:00:00
abstract：:In this study Yan'an City, a typical hilly valley city, was considered as the study area in order to explain the relationships between the surface urban heat island (SUHI) and land use/land cover (LULC) types, the landscape pattern metrics of LULC types and land surface temperature (LST) and remote sensing indexes wer...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph14080840
更新日期：2017-07-26 00:00:00
abstract：:(1) BACKGROUND: In 2011, new chronic disease guidelines were introduced across Mongolia. No formal advice was provided regarding role delineation. This study aimed to analyse the roles that different primary care providers adopted, and the variations in these, in the implementation of the guidelines in urban Mongolia;...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph13040407
更新日期：2016-04-07 00:00:00
abstract：:In recent years, international environmental and public health research has become a hot topic, and battery recycling, which is often mentioned separately from waste disposal, has likewise become an academic topic. Battery recycling research is beneficial not only for controlling toxic and harmful substances, but also...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17218204
更新日期：2020-11-06 00:00:00
abstract：:Background: The prevalence of non-communicable diseases is rising in low and middle-income countries (LMICs) such as Zimbabwe, yet, the risk factors associated with overweight and obesity among women in the country have not been explored. This study investigated the trends in prevalence and demographic, socioeconomic ...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph16152758
更新日期：2019-08-02 00:00:00
abstract：:Loss of property value is a major concern in communities faced with the toxic byproducts of industrial practices. Even after site remediation, stigma may persist and negatively affect market values of residential properties. To study the effects of contamination and of remediation on property values in Midland, Michig...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph16203900
更新日期：2019-10-15 00:00:00
abstract：:Lead service lines (LSLs)-lead pipes connecting the water main under the street to a building's plumbing-contribute an estimated 50% to 75% of lead in tap water when they are present. Although Congress banned lead in plumbing materials in 1986, over 6 million LSLs remain in homes across the United States today. This p...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph16060963
更新日期：2019-03-18 00:00:00
abstract：OBJECTIVE:We aimed to assess the cost-effectiveness of hepatitis C virus (HCV) screening strategies among recently arrived migrants in the Netherlands. METHODS:A Markov model was used to estimate the health effects and costs of HCV screening from the healthcare perspective. A cohort of 50,000 recently arrived migrants...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17176091
更新日期：2020-08-21 00:00:00
abstract：:This study investigated the prevalence and severity of depression, anxiety, and stress and determined the association between various factors, social support, and depression, anxiety, and stress among university healthcare workers in Malaysia after the government lifted the movement control order (MCO) put in place to...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17249155
更新日期：2020-12-08 00:00:00
abstract：:Recent meta-analyses of positive organizational psychology interventions (POPIs) suggest that interventions that target and improve hope, efficacy, resilience, and optimism (HERO) can be highly effective at improving well-being and positive functioning at work. However, many studies to date have been conducted with sa...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17249432
更新日期：2020-12-16 00:00:00
abstract：:Cambodia is prone to extreme weather events, especially floods, droughts and typhoons. Climate change is predicted to increase the frequency and intensity of such events. The Cambodian population is highly vulnerable to the impacts of these events due to poverty; malnutrition; agricultural dependence; settlements in f...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph120100191
更新日期：2014-12-23 00:00:00
abstract：:Waste source separation is the fundamental premise to ensure effective waste recycling. Whether the entire waste recycling and reduction process can be effectively carried out depends on the waste source separation. Clarifying the driving mechanism of waste separation behavior plays an important role in effectively gu...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph16101859
更新日期：2019-05-27 00:00:00
abstract：:Stress can impact multiple psychological and physiological human domains. In order to better understand the effect of stress on cognitive performance, and whether this effect is related to an autonomic response to stress, the Trier Social Stress Test (TSST) was used as a testing platform along with a 2-Choice Reaction...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph15061080
更新日期：2018-05-26 00:00:00
abstract：:Indoor pollutants can have short- and long-term health effects, especially if exposure occurs during prenatal life or early childhood. This study describe the perceptions, knowledge, and practices of adults concerning indoor environmental pollution. Adults of 18 to 45 years of age were recruited in the department of I...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17207669
更新日期：2020-10-21 00:00:00
abstract：:Background: We aimed to review published studies to obtain the best estimate of the risk of depression and anxiety among colorectal cancer (CRC) patients. Methods: We searched the PubMed/Medline database, Web of Science, and Google Scholar on the prevalence of depression or anxiety in CRC patients. A review of 15 stud...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章,评审
doi：10.3390/ijerph16030411
更新日期：2019-01-31 00:00:00
abstract：:The aim of this study was to analyze the distribution and effectiveness of the different types of smash in professional padel according to the area and direction of the strokes and the gender. Through systematic observation, 1.015 smashes from eight finals (four men's and four women's) of the professional matches were...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17197027
更新日期：2020-09-25 00:00:00
abstract：:This study aimed to examine the mediating effects of self-stigma and depression on the public stigma and nurses' attitudes toward psychiatric help. A cross-sectional study with 184 nurses at one general hospital in South Korea was conducted employing a self-administered survey, using the Attitudes toward Seeking Psych...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17145073
更新日期：2020-07-14 00:00:00
abstract：:Climate change-related extreme events such as floods have and will continue to present a great challenge to disaster risk management. There is a pressing need to develop a robust management strategy via enhancing the resiliency of the community, particularly in the context of complex urban environments, like Jakarta. ...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph16203993
更新日期：2019-10-18 00:00:00
abstract：:Endocrine disrupting chemicals (EDC) are compounds that alter the normal functioning of the endocrine system of both wildlife and humans. A huge number of chemicals have been identified as endocrine disruptors, among them several pesticides. Pesticides are used to kill unwanted organisms in crops, public areas, homes ...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章,评审
doi：10.3390/ijerph8062265
更新日期：2011-06-01 00:00:00
abstract：:Family rules, routines, and resources shape children's creativity. However, little is known about how parents' creative self-concepts and creative activity are related to the lifestyle adults create in their families. Family lifestyle might be operationalized as referring to domain-general dimensions of family social ...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17249558
更新日期：2020-12-21 00:00:00
abstract：:By 15 April 2020, more than 1.5 billion students worldwide experienced school closures in an effort to slow the spread of a novel coronavirus, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), during the worldwide coronavirus disease 2019 (COVID-19) pandemic. These interruptions in formal in-person educati...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17176371
更新日期：2020-09-01 00:00:00
abstract：:Despite improvements in chemical safety management systems, incidents involving the release of hazardous chemicals continue to happen. In some cases, they result in the evacuation of residents. For hazardous chemical release accidents, an evacuation plan needs to be selective enough to consider both the indoor and out...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph16111948
更新日期：2019-06-01 00:00:00
abstract：:Since Anderson's now classic, Code of the Street: Decency, Violence, and the Moral Life of the Inner City, an increasing number of researchers have found a significant association between the code of the street and antisocial behavior. Less researched, however, is the relationship between the code of the street and co...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17072432
更新日期：2020-04-03 00:00:00
abstract：:The HIV epidemic has dramatically changed over the past 30 years; there are now fewer newly infected people (especially children), fewer AIDS-related deaths, and more people with HIV (PWH) receiving treatment. However, the HIV epidemic is far from over. Despite the tremendous advances in anti-retroviral therapies (ART...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17134704
更新日期：2020-06-30 00:00:00
abstract：:Objective and subjective health generally have a positive relationship, although their association may be moderated by factors such as gender and personality. We aimed to analyze the association between personality and objective (metabolic syndrome (MetS)) and subjective-physical health in older men and women. For thi...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17238809
更新日期：2020-11-27 00:00:00
abstract：:HPV (human papillomavirus) vaccinations have been introduced into the population of many countries through vaccination programs, although their acceptance varies from country to country, largely dependent on the state of knowledge about diseases caused by genital HPV types as well as cultural, social, and religious fa...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph18020551
更新日期：2021-01-11 00:00:00
abstract：:In the latest literature search, the technology based on graphite oxide (GO) nanomaterials exhibits a great potential in many aspects of wastewater treatment involving adsorption, photocatalysis, disinfection and membrane process. In this study experimental data involving the carbon element in different forms such as ...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17165862
更新日期：2020-08-13 00:00:00
abstract：:Stress and mental health at work are the leading causes of long-term sickness absence in the UK, with chronically poor working conditions impacting employee physiological and psychological health. Social workers play a significant part in the fabric of UK society, but have one of the most stressful occupations in the ...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17238730
更新日期：2020-11-24 00:00:00
abstract：:Although bruxism is a common issue with a high prevalence, there has been a lack of epidemiological data about bruxism in Vietnam. This cross-sectional study aimed to determine the prevalence and associated factors of bruxism and its impact on oral health-related quality of life among Vietnamese medical students. Brux...
journal_title：International journal of environmental research and public health
pub_type： 杂志文章
doi：10.3390/ijerph17207408
更新日期：2020-10-12 00:00:00
