scholarly journals Teor de umidade inicial e sua influência no processo de biossecagem de lodo

2021 ◽  
Vol 14 (34) ◽  
Author(s):  
Luiza Pinatti Astolphi ◽  
Juliana da Silva Oliveira ◽  
Cali Laguna Achon
Keyword(s):  
Bulking Agents

As estações de tratamento de esgoto têm grande impacto na saúde pública, pois tratam o esgoto doméstico com o objetivo de devolvê-lo aos corpos d'água como efluente líquido limpo ou para reaproveitamento. Esse tipo de processo produz uma grande quantidade de lodo, que é classificado como resíduo sólido e, portanto, deve ser recuperado, reaproveitado ou reciclado, sendo o aterro o último recurso. O tratamento do lodo é dividido em cinco etapas, sendo estas: adensamento, digestão, desaguamento, secagem e aproveitamento (ou destinação final), de forma a obter uma massa com volume reduzido devido à retirada de água. Uma das opções de processo de secagem é a biossecagem ou biodrying, a qual, utiliza o calor gerado pela fermentação aeróbia de microrganismos para remover a água combinada com o lodo. A vantagem desse procedimento é que ele retém o poder calorífico da massa final, permitindo sua queima e aproveitamento energético. Algumas condições afetarão o processo de biossecagem, entre as quais podemos citar: o teor de umidade inicial, a taxa de aeração, a proporção de mistura dos materiais estruturantes, o revolvimento da massa e a adição de componentes biológicos auxiliares (bulking agents). Este artigo tem como objetivo avaliar, a partir da literatura, a importância e o impacto da alteração do teor de umidade inicial do lodo no processo de biossecagem.

scholarly journals Assessment of content and chemical forms of arsenic, copper, lead, and chromium in sewage sludge compost as affected by various bulking agents

2020 ◽  
Vol 43 (1) ◽  
pp. 56-66
Author(s):  
Mahboub Saffari ◽  
Vahid Reza Saffari ◽  
Hojatollah Khabazzadeh ◽  
Hormazd Naghavi
Keyword(s):  
Sewage Sludge ◽  
Total Concentration ◽  
Bulking Agents ◽  
Chemical Forms ◽  
Organic Fraction ◽  
Specific Kind ◽  
Composting Process ◽  
Mobility Factor ◽  
Arsenic Copper ◽  
Different Levels

AbstractIn current study, the effect of various organic substances as bulking agents (BAs) including wheat straw, pistachio hull wastes, and tree leaves at different levels (10, 25, 45% v/v) were investigated on total concentration and chemical forms of Cu, Pb, Cr, and As in sewage sludge (SS) compost prepared by windrow method. According to the results, the composting process (with/without BAs), due to losses of SS mass and volume, increased the total concentration of heavy metals (HMs) compared to the un-composted SS sample (RSS). Evaluation of HMs chemical forms in prepared compost sample without BAs application (CSS) showed that the composting process reduced the mobility factor of As (from 28% to 20%), Pb (from 11.6% to 9.3%), and Cr (from 14.5% to 9.2%) compared to the RSS. Application of three BAs considerably decreased the mobility factor of As (17.5-18.8%), Pb (4.8-7.9%), and Cr (1.4-6.8%) compared to CSS and RSS. Changes of Cu mobility in prepared compost samples showed an unclear trend, however in some treatments, due to transferred organic fraction into exchangeable and carbonate fractions, increasing of this factor was obvious. Generally, the composting appeared to reduce As, Pb, and Cr availability by stabilizing the three metals and making them more stable and less mobile. In addition, the BAs application effect on HMs behavior of SS compost samples were so different and no specific kind of BAs can be recommended as a superior BAs in SS composting process.

Characterization of compost produced from separated pig manure and a variety of bulking agents at low initial C/N ratios

2011 ◽  
Vol 102 (14) ◽  
pp. 7131-7138 ◽  
Author(s):  
Tereza Nolan ◽  
Shane M. Troy ◽  
Mark G. Healy ◽  
Witold Kwapinski ◽  
James J. Leahy ◽  
...  
Keyword(s):  
Pig Manure ◽  
Bulking Agents

Current Status of Bulking Agents for Urinary Incontinence

2013 ◽  
Vol 9 (1) ◽  
pp. 13-17
Author(s):  
Lara S. MacLachlan ◽  
Eric S. Rovner
Keyword(s):  
Urinary Incontinence ◽  
Current Status ◽  
Bulking Agents

Imaging of Urethral Bulking Agents

2017 ◽  
pp. 229-241
Author(s):  
Aparna Hegde ◽  
G. Willy Davila ◽  
S. Abbas Shobeiri
Keyword(s):  
Bulking Agents ◽  
Urethral Bulking Agents ◽  
Urethral Bulking

Bulking Agents

2006 ◽  
pp. 121-126
Author(s):  
Raymond R. Rackley ◽  
Ahmed Elazab
Keyword(s):  
Bulking Agents

scholarly journals Effects of Different Agro-Based Materials on Composting of Pulp/Paper-Mill Sludge

2014 ◽  
Vol 40 (1) ◽  
pp. 33-40
Author(s):  
Nurdan Aycan ◽  
Nurdan Gamze Turan
Keyword(s):  
Rice Husk ◽  
Paper Mill ◽  
Bulking Agents ◽  
Paper Mill Sludge ◽  
Total N ◽  
Compost Maturity ◽  
Pulp Paper ◽  
Composting Systems ◽  
Maturity Parameters

Abstract The effects of different volumetric ratios of bulking agents to pulp/paper-mill sludge on composting were studied. Rice husk and corncob were used as bulking agents. Volumetric ratios of bulking agents to pulp/paper-mill sludge were used as 10:100 and 25:100. To monitor the evolution of the composting systems, routine parameters such as temperature, moisture, pH, total N, NH4 +-N, NO3 --N, total C, and C/N ratio were analyzed. The results indicated that the agro-based materials significantly affected compost maturity parameters. Moreover, the quality of the product obtained in the composting process treated with the agro-based materials achieved satisfactory stabilization and sanitation for application to land.

scholarly journals INDICATIONS FOR INJECTION OF BULKING AGENTS FOR THE TREATMENT OF ANAL INCONTINENCE

2017 ◽  
pp. 43-48
Author(s):  
A. I. Nedozymovany ◽  
E. A. Dementeva ◽  
D. E. Popov ◽  
S. V. Vasiliev
Keyword(s):  
Comparative Analysis ◽  
Anal Canal ◽  
Anal Incontinence ◽  
Bulking Agents ◽  
Study Objective ◽  
Relevant Today ◽  
Surgical Methods ◽  
The Mean ◽  
Methods Of Treatment

Despite of lots conservative and surgical methods of treatment, the problem of anal incontinence is relevant today and remains unresolved. Since the beginning of the 1990s attempts ofimplantation of bulking agents in order to increase the basal pressure in the anal canal were begun. Domestic product “ДАМ+” used in the study. OBJECTIVE. To determine the indications for injection of bulking agents for the treatment of anal incontinence. Research the possibility of using the drug “ДАМ+,” with assessment of treatment outcomes. During a period of 2014 to 2016 there were 30 patients with anal incontinence of various etiologies involved in research. The mean age was 47,5 ± 6,5 years. Injection of bulking agent “ДАМ+” were performed by the punction of submucosa of the anal canal in 3 points, andfollowed by a comparative analysis of the survey after treatment. Average follow-up was 12,1 ± 0,97 months. The study we have identified indications for the implementation of bulking agents for correction of anal incontinence, and the estimation results.

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