The ammonia concentrations in 1.25 and 2.3 metre deep waste stabilization ponds at Extrabes N.B. Brazil receiving domestic sewage were largely independent of the surface organic loadings on least above loading rates 200 kg BOD5 ha−1 d−1, but varied with time between 14 29 mg L−1 (NH3-N). During daylight, pH values reached about 9.0 (or sometimes higher) water layers as a result algal photosynthesis. Laboratory growth studies showed that pond isolate Chlorella was more tolerant to than...

Aiming at yield increase through plant type improvement, pest and disease tolerance, wide adaptability, the locally developed high-yielding rice variety At362 was hybridized with Milyang23, a Korean variety. From resulting cross, line, Ld8-13-4, selected based on better agronomic characters crossed again IR79200-65-2-2, bacterial leaf blight-resistant line proven phenotypic acceptability. The study conducted Rice Research Station, Labuduwa, Sri Lanka, from 2009–2015. Generation advancements...

How can one identify trading market cycles? Patience, when combined with technical analysis, offers valuable insights into cycles, providing investors an effective framework for decision- making. Understanding the current phase of a cycle is essential identifying optimal opportunities to enter or exit specific asset. While it nearly impossible perfectly predict bottoms peaks, feasible regions that approximate these critical points. The development and implementation systems leverage...

The removal of excreted bacteria (faecal coliforms, faecal streptococci, Clostridium perfringens, total and sorbitol-fermenting bifidobacteria, salmonellae thermophilic campylobacters) viruses (enterovirus rotavirus) in a series deep anaerobic, facultative maturation ponds (depth range: 2.8 - 3.4 m), with an overall retention time 21 days mean mid-depth temperature 27°C, was studied. Thermophilic campylobacters, bifidobacteria were not detected after 11, 16 days' respectively. Faecal...

Nitrogen removal in its various chemical forms was evaluated a complex of waste stabilisation ponds comprising different depths and geometries. TKN ammonia reached 78.5% >90%, respectively, the 5-pond systems with overall retention times only 19 days. Removals were highest maturation ponds, shallow most efficient. In terms optimum pond geometry, high nitrogen compatible optimal BOD5 faecal coliform die-off. these could be modelled using conventional first-order equations.

Ammonia removal was monitored in a waste stabilisation pond complex comprising ponds of different geometries and depths under two operational regimes. It found that high degree ammonia commenced the secondary maturation ponds, with highest removals occurring shallowest as consequence improved aerobic conditions. The tertiary produced effluents mean concentrations < 5 mg N/l, maximum permitted recommended by Brazilian environmental legislation for discharge wastewater treatment plants into...

Diurnal series of samples the effluent and total in-pond water column facultative maturation ponds were analysed for COD, suspended solids, faecal coliforms, chlorophyll ammonia with a view to finding most efficient way obtaining reliable mean daily quality data. The results show that individual representative entire depth pond taken at any time day provided reasonably accurate values all parameters measured when compared calculated from grab collected throughout day. same could not be said...

The adequate water supply and nitrogen in the soil is essential for growth development of plants.Sunflower target several studies such factors due to economic importance needs expand semi-arid regions Brazil.This work aimed evaluate variables, measured at 80 days after sowing (DAS), biomass obtained 100 DAS Helio 253 sunflower hybrid under effect levels.The experiment was conducted a greenhouse city Campina Grande-PB, split-plot completely randomized design with four moisture levels (50, 75,...

The performance was studied of a series 2.2 m deep anaerobic, facultative and maturation ponds, which had an overall retention time 25 days, mean mid-depth temperature 25°C. percentage removals BOD, COD, suspended solids faecal coliforms were 88, 69, 83 99.97 respectively; there only 4 percent reduction ammonia 6 total phosphorus. results are compared with those previously reported for similar 1 – 1.2 ponds at the same site.

RESUMOA água é um recurso natural que, nos últimos anos, tem sido alvo de inúmeras discussões quanto ao seu uso e disponibilidade. No setor agrícola o volume necessário à irrigação calculado com base nas perdas ocorridas por evaporação transpiração motivo que este trabalho teve, como objetivo, determinar a evapotranspiração máxima real da cana-de-açúcar irrigada gotejamento. Os dados para esta pesquisa foram obtidos em experimento conduzido na região Rio Largo, AL, sete tratamentos (0; 25;...

Sulphur and phosphorous transformations were studied in two pilot-scale wastewater storage treatment reservoirs on the basis of four experiments carried out at EXTRABES northeast Brazil. The fed with effluent from an anaerobic pond after filling they allowed to rest until faecal coliform numbers dropped below 100 cfu/100 ml (10 times WHO guideline for unrestricted irrigation). During periods sulphate was reduced sulphide which reached high values by beginning period, decreasing thereafter...

This paper describes faecal coliform (FC) removal in pilot-scale Wastewater Storage and Treatment Reservoirs (WSTR) northeast Brazil. FC decay during the filling phase of WSTR was very reduced, suggesting that these reactors should be filled as quickly possible, subjected to highest organic loading will not cause odour emissions. The employed this study 659 kgBOD5/ha.d, causing no nuisance conditions. During resting phase, rate decreased exponentially Chick's law modified. time into for...

Nitrogen removal in its various chemical forms was evaluated a complex of waste stabilisation ponds comprising different depths and geometries. TKN ammonia reached 78.5% &amp;gt;90%, respectively, the 5-pond systems with overall retention times only 19 days. Removals were highest maturation ponds, shallow most efficient. In terms optimum pond geometry, high nitrogen compatible optimal BOD5 faecal coliform die-off. these could be modelled using conventional first-order equations.

Neste trabalho objetivou-se manter a qualidade e aumentar o tempo de prateleira durante pós-colheita bananas 'Prata-Anã' se avaliou eficiência do armazenamento refrigerado (AR) da atmosfera modificada (AM) pelo uso embalagens plásticas polietileno baixa densidade (PEBD), vácuo utilização sachê adsorvedor etileno. Os tratamentos foram: T1: Controle (sem embalagem, sistema adsorção etileno sem vácuo); T2: Embalagem (PEBD); T3: PEBD + etileno; T4: T5: vácuo. As análises foram realizadas em...

Ammonia removal was monitored in a waste stabilisation pond complex comprising ponds of different geometries and depths under two operational regimes. It found that high degree ammonia commenced the secondary maturation ponds, with highest removals occurring shallowest as consequence improved aerobic conditions. The tertiary produced effluents mean concentrations &amp;lt; 5 mg N/l, maximum permitted recommended by Brazilian environmental legislation for discharge wastewater treatment plants...

In this study on the experimental pond complex at Federal University of Paraiba in NE Brazil organic loadings were more than doubled to investigate effect performance. The results emphasise tolerance system high without odour production or significant loss efficiency terms BOD removal and bacterial pathogen removal, although nutrient by maturation ponds was reduced. At baffled efficient faecal coliform (FC). A minimum 3 series are required ensure maximum removal. Shallow also FC depth...

A irrigação na agricultura permite dar condições para que o material genético expresse em campo todo seu potencial de produção, mas são necessários estudos científicos otimizar uso da água regiões difícil acesso à mesma, como é caso das semiáridas. Diante disso, presente trabalho teve por objetivo determinar a lâmina econômica cultura do feijão caupi região Sertão Alagoano. Foi utilizada uma variedade crioula tipo fradinho comumente cultivada pelos agricultores região, qual foi submetida...

ECONOMIC DEPTH OF DRIP IRRIGATION ON SUGARCANE SAMUEL SILVA1; JOSÉ DANTAS NETO2; IÊDO TEODORO3; SILVANETE SEVERINO DA RONALDO DO NASCIMENTO2 E GERALDO VERÍSSIMO DE SOUZA BARBOSA4 1Agronomy Engineer, Doctoral in Agricultural Engineering, Center for Technology and Natural Resources, Federal University of Campina Grande, Grande PB Brazil, E-mails: {sam_capela, silvanete.h} @hotmail.com2Agronomy Titular Professor, {zedantas1955, ronaldon453} @gmail.com3Agronomy Adjunct Sciences, Alagoas, Rio...

High quality effluents suitable for crop irrigation can be produced by lime and Clarifloc treatment of raw domestic wastewater: in laboratory jar-test experiments the average percentage removals were 99.999 faecal coliforms, 99 – 99.9 salmonellae, 100 total parasites percent rotavirus. The COD suspended solids 79 87 97 respectively. was marginally better than that achieved lime.

PARÂMETROS PRODUTIVOS DO MILHO SOB DÉFICIT HÍDRICO EM DIFERENTES FASES FENOLÓGICAS NO SEMIÁRIDO BRASILEIRO SAMUEL SILVA1, AMANDA CIBELE DA PAZ SOUSA2, CARLA SABRINA SILVA3, EDMAÍRIS RODRIGUES ARAÚJO4, MARCELO AUGUSTO SILVA SOARES5, IÊDO TEODORO6 1Professor do Instituto Federal de Alagoas (IFAL), Campus Piranhas, Av. Sergipe, 1477, 57460-000, Alagoas, Brasil, samuel.silva@ifal.edu.br 2 Graduanda em Engenharia Agronômica, 8° período. E-mail: amandacibele-21@hotmail.com 3 5°...

Objetivou-se, com este trabalho, determinar a dose econômica de adubação nitrogenada para o milho em quatro épocas cultivo. O experimento foi conduzido delineamento blocos casualizados, esquema parcelas subdividas, repetições. As foram constituídas por plantio (E1: 28/05, E2: 11/06, E3: 25/06 e E4: 22/07) nas subparcelas aleatorizadas doses N (0, 75, 150 225 kg ha-1). A cultivar AG7088, sendo produtividade medida na fase grão farináceo. agrícola 8,0; 7,5; 5,9 6,3 t ha-1 E1, E2, E3 E4,...

The low availability of water in the soil is one precursors stress plant, responsible for decrease growth and losses crop productivity, by hindering maintenance essential metabolic processes. Many experimental results have demonstrated effect silicon (Si) as an attenuator environmental stresses plants. Thus, objective this research was to evaluate corn subjected application semi-arid region Alagoas. design used strips with four replications, schematized subdivided plots. culture a...

O presente trabalho objetivou avaliar o efeito do estresse hídrico sobre índice de clorofila milho e determinar a lâmina econômica irrigação para cultura na região Sertão Alagoano. Para tal, híbrido AG7088 foi submetido cinco lâminas (40, 80, 120, 160 200% da ETc) em experimento conduzido no Instituto Federal Alagoas/Campus Piranhas, com delineamento experimental esquema faixas quatro repetições. A colheita realizada aos 98 dias após semeadura (DAS), que produtividade grãos 12% umidade...