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Spanish to English: a novel approach to biological wastewater treatment
Source text - Spanish TAYA: A Novel Approach to Biological Wastewater Treatment Saving Millions of USD in
CAPEX & OPEX
A Competitive Feasibility Study of TAYA Technology
This article is an overview of a feasibility study carried out by Dr. Menahem Libhaber for a
treatment plant in a city in Latin America. Dr. Libhaber conducted an economic and financial
comparison of a TAYA treatment plant and a Trickling Filters plant with nitrificationdenitrification (Trickling Filters N-DN). Both studies took place under the conditions of a
greenfield in Bolivia. Each plant has the capacity to treat 54,000 m3
/d of raw municipal wastewater
with a BOD concentration of 290 mg/l and a total nitrogen concentration of 67 mg/l. Each plant
will serve a population of approximately 400,000 people and will also treat commercial
wastewater.
The TAYA ECO wastewater plant consists of a preliminary treatment unit, three parallel anaerobic
lagoons and 18 pairs of TAYA reactors. Sludge drying beds are also a part of the plant’s treatment
system. The trickling filter wastewater treatment plant removes BOD as well as nitrogen.
The cost of the trickling filters plant was estimated by the consulting firm that designed the plant
(a feasibility design level), and 15% was added to cover contingencies, design and supervision
expenses. Later on, the consulting firm increased the estimated investment cost – CAPEX, by
27.5% to account for contingencies, design and supervision expenses. To generate the final report,
the team used the increased cost of the trickling filter alternative.
The same estimate of 15% was given for the TAYA plant’s contingencies, design and supervision
expenses. The estimated cost for the TAYA components was made by TRIPLE-T and was
regarded as accurate. To derive the cost of the other plant’s components (preliminary treatment,
anaerobic lagoons and drying beds), the team used reliable data from another plant in the area.
Economic Analysis
Table 1: Results of the economic comparison of TAYA and Trickling Filters N-DN treatment
plants each treating 54,000 m3
/d of municipal wastewater in Bolivia
Process Investment Cost
US$
O&M Cost
US$/year
Present Value (PV)
of investment for 20
years at 6% interest
US$
TAYA 50,146,865 848,017 65,127,793
Trickling Filters
with N-DN
52,664,750 2,374,949 96,044,633
The investment in the trickling filter plant is a bit higher than the investment in the TAYA plant.
TRIPLE-T SEO ARTICLE TAYA TECHNOLOGY COMPARISON
2
The economic analysis shows that financially (considering the present value of total investments
plus annual expenses), the TAYA alternative is a preferred alternative because its O&M costs are
much lower.
Financial Analysis
The financial analysis refers to the comparison of the annual cost that the regional water and
sanitation company will have to pay for each of the two alternatives. The analysis assumes that the
company obtains a concessional loan from one of the international financing agencies (i.e. the
World Bank, IDB, CAF, KfW or JICA) but has to pay the O&M costs from its internal budget
generation since the international financing agencies do not finance O&M costs.
Hence the annual cost of each alternative will be the Annual Loan Repayment amount plus the
Annual O&M cost. In this arrangement, OPEX savings are crucial.
Assuming all the mentioned international financing agencies provide loans at similar lending
terms, the team used World Bank’s current lending terms for a loan in US$ to Bolivia as specified
below:
Interest rate: 1.3%
Grace period: 10 years
Maturity: 40 years
The significance:
Year 1 to 10: repayment of interest only
Year 11 to 40: repayment of the loan and the interest
Table 2: Comparison of Annual costs of the Full TAYA Alternative and the Trickling Filters NDN Alternative
Treatment
Alternative
Year Range Loan Repayment
Cost ($)
O&M Cost ($) Total Annual
Expense ($)
Full Taya 1-10 651,909 848,017 1,499,926
Full Taya 11-40 2,863,579 848,017 3,711,596
Trickling Filter
N-DN
1-10 888,787 2,374,949 3,263,736
Trickling Filter
N-DN
11-40 3,007,360 2,374,949 5,382,309
* All costs are per year and pertain to the treatment plant in Bolivia
TRIPLE-T SEO ARTICLE TAYA TECHNOLOGY COMPARISON
3
The financial analysis shows that the TAYA outshines the alternative since its total annual cost for
the water and sanitation company is significantly lower.
Summary
TAYA ECO Plant Saves Millions of Dollars in CAPEX and OPEX
Overall, the TAYA ECO plant demonstrated a clear economic value, saving $2.5M in CAPEX and
$1.5M in OPEX per year. Coupled with the simplified, easy operation, a TAYA plant is a preferred choice.
Translation - English Un novedoso enfoque al tratamiento biológico de aguas residuales que ahorra millones de USD en CAPEX y OPEX
Un estudio de factibilidad acerca de la competitividad de la tecnología TAYA.
Esta articulo es un resumen del estudio de factibilidad que llevo a cabo el Dr.Menahem Libhaber (Ingeniero Consultor del Banco Mundial)correspondiente a un PTAR a construirse en una ciudad de Bolivia.
El Dr.Libhaber llevo a cabo un estudio técnico/económico comparando el sistema TAYA ECO a un sistema de Filtros Percolados con N-DN. Para ambos estudios se tomaron en cuenta condiciones similares a las de una prueba piloto a llevarse a cabo en territorio boliviano.
Cada sistema tiene la capacidad de tratar 54000m3/hr de aguas residuales con una concentración bBO de 290mg/l y un valor de TN de 67mg/l. Cada planta se supone serviría a una población de 400.000 personas y además trataría agua residual de origen comercial.
La PTAR TAYA ECO consiste en un sistema de tratamiento preliminar (eliminación partículas y /u objetos de más de 6mm), 3 piscinas anaeróbicas paralelas mas 18 pares de reactores TAYA y 3 camas de secado de lodos. Estos últimos son parte de la PTAR. La planta de Filtros Percolados remueve tanto el DBO como el nitrógeno.
El costo de la PTAR de Filtros Percolados fue estimado por la firma consultora quien diseño la planta (a nivel de factibilidad) y a este numero se le agrego un 15% para cubrir las posibles contingencias. Luego la empresa consultora aumento este porcentaje del 15% al 27.5%. Este ultimo es el valor con que se hizo el informe final.
ANALISIS ECONOMICO
Tabla 1: Resultado de la comparación económica entre ambas tecnologías
PROCESO COSTO DE INVERSION (USD) OPEX (USD/AÑO) VALOR ACTUAL DE LA INVERSIO a 20 años y una tasa de interés del 6% (USD)
TAYA ECO
50,146,865 848,017 65,127,793
FILTRO PERCOLADOR 52,664,750 2,374,949 96,044,633
La inversión en la Planta de filtros percolados es un poco mas alta. El análisis económico nos muestra que financieramente la alternativa TAYA es la preferida porque su OPEX es mucho más baja.
ANALISIS FINANCIERO
El análisis financiero compara el costo anual que la empresa sanitaria pagar por cada una de las alternativas. El análisis asume que la empresa sanitaria obtiene un préstamo concesional de una agencia financiera internacional pero que tiene que pagar el OPEX de su presupuesto interno. Por lo tanto, el costo anual de cada alternativa sería el Repago Anual del Préstamo + OPEX anual. En este tipo de arreglo el ahorro en OPEX es crucial.
Asumiendo que todas las agencias de financiamiento internacional dan préstamos a términos similares se tomaron las condiciones del Banco Mundial para un préstamo en Bolivia en USD.
Tasa de interés: 1.3%
Periodo de gracia: 10 años
Vencimiento: 40 años
Año 1 a 10 repago de intereses solamente
Año 11 a 40 repago del préstamo + intereses
Tabla 2: Comparación de Costos Anuales entre las dos alternativas
Tipo de Tratamiento Rango en Años Costo Repago del Préstamo (USD) Costo OPEX Costo Total Anual (USD)
TAYA ECO 1-10 651,909 848,017 1,499,926
TAYA ECO 11-40 2,863,579 848,017 3,711,596
FILTROS PERCOLADOS N-DN 1-10 888,787 2,374,949 3,263,736
FILTROS PERCOLADOS N-DN 11-40 3,007,360 2,374,949 5,382,309
El análisis financiero muestra que el sistema TAYA eclipsa la alternativa, ya que su costo anual es mucho más bajo.
RESUMEN
El sistema TAYA ECO demuestra una ventaja económica muy clara, ahorrando 2.5MUS$ en CAPEX y 1.5MUS$ por año en OPEX. Este factor junto con su sencillez de operación hace que la tecnología TAYA ECO sea la preferida.
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Experience
Years of experience: 16. Registered at ProZ.com: Dec 2022.
CafeTran Espresso, Google Translator Toolkit, Microsoft Office Pro, Microsoft Word, Powerpoint
Bio
FOR MANY YEARS KNOW I HAVE BEEN WORKING IN THE PLASTIC PIPE INDUSTRY AND ITS APPLICATION TO SANITARY AND MINNING INDUSTRIES. SINCE THE PRODUCTS WERE AIMED TO THE LATINAMERICAN MARKET I HAD TO MAKE QUITE A FEW TRANSLATIONS (ENGLISH TO SPANISH AND/OR HEBREW TO SPANISH) OF TECHNICAL BROCHURES , CASE STUDIES, CONTRACTS, AND MORE.
IN THE LAST THREE YEARS I HAVE ADDED ANOTHER EXPERIENCE IN THE WASTEWATER INDUSTRY WHERE I HAD TO TRANSLATE TECHNICAL BROCHURES, PAPERS, CASE STUDIES, CONTRACTS AND MORE.
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