Influence of water treatment residuals on dewaterability of wastewater biosolids

2013 ◽  
Vol 67 (1) ◽  
pp. 180-186 ◽  
Author(s):  
Malcolm Taylor ◽  
Herschel A. Elliott
Keyword(s):  
Water Treatment ◽  
Filter Press ◽  
Mass Ratio ◽  
Water Treatment Residuals ◽  
Capillary Suction ◽  
Processing Equipment ◽  
Polymer Addition ◽  
Hydrous Oxides ◽  
Influence Of Water ◽  
Belt Filter Press

Co-dewatering of water treatment residuals (WTR) and wastewater biosolids can potentially benefit municipalities by reducing processing equipment and costs. This study investigated dewaterability (using capillary suction time, CST) of combined alum residuals (Al-WTR) and anaerobically digested biosolids at various blending ratios (BR), defined as the mass ratio of WTR to biosolids on a dry solids basis. Without polymer addition, the CST was 160 s for a BR of 0.75 compared with 355 s for the biosolids alone. The optimum polymer dose (OPD), defined as the polymer dose yielding CST of 20 s, was reduced from 20.6 g kg−1 dry solids for the biosolids alone to 16.3 and 12.6 g kg−1 when BR was 0.75 and 1.5, respectively. Precipitated Al hydrous oxides in the WTR likely caused flocculation of the biosolids particles through heterocoagulation or charge neutralization. The solids contents of the blended materials and biosolids at their respective OPDs were not statistically different (α = 0.05) following dewatering by a belt-filter press. We conclude addition of Al-WTR improved biosolids dewaterability and reduced polymer dosage. In practice, the extent of these benefits may be limited by the quantity of WTR produced relative to the amount of wastewater solids generated by a municipality.

Cost-Effective Dewatering of Municipal Treatment Plant Sludges Using Belt Presses

1990 ◽  
Vol 22 (12) ◽  
pp. 173-182
Author(s):  
W. N. Clarke ◽  
Ed. Hodges ◽  
Robert J. Ooten
Keyword(s):  
System Performance ◽  
Selection Process ◽  
Treatment Plant ◽  
Cost Effective ◽  
Filter Press ◽  
Maintenance Costs ◽  
Capital Costs ◽  
Polymer Addition ◽  
The Past ◽  
Belt Filter Press

An evaluation was conducted at the County Sanitation Districts of Orange County (CSDOC) which led to the purchase and installation of the belt filter presses currently in use. A selection process was made including pre-qualification of bidders after an exhaustive nationwide search and study of all known existing belt filter press facilities. Subsequent methods were employed for purchasing belt filter presses of the same make and manufacturer. Operating experiences and maintenance costs as well as minor modifications which were found to be desirable were documented. The paper will discuss in some detail the design criteria, capacity, polymer addition system, performance at CSDOC Plant No. 1 and Plant No. 2, sludge characteristics and the effect of chemical conditioning. Discussion regarding operation and maintenance criteria, such as staffing, operating and maintenance modes, operational checks, belt life and belt specification, safety ventilation required for the removal of odorous materials and hydrogen sulfide, data recording, and polymer dosing is included. Cost considerations, including capital costs, as well as operating and maintenance costs for the past five years are covered.

scholarly journals STUDI PENGOLAHAN LUMPUR INSTALASI PENGOLAHAN AIR MINUM TAMAN KOTA - JAKARTA BARAT

2015 ◽  
Vol 7 (2) ◽  
pp. 75
Author(s):  
Dedi Alfa Julian ◽  
Muhammad Lindu ◽  
Winarni .
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Filter Press ◽  
Belt Filter Press

<p>Instalasi pengolahan air minum (IPA) Taman Kota, Jakarta Barat, memiliki kapasitas disain 200 liter/detik, dan air baku berasal dari Cengkareng Drain dan terdapat unit prasedimentasi sebelum air baku masuk ke IPA. Digunakan IPA konvensional yang dilengkapi dengan unit bio filter untuk mengabsorbsi zat organik di air baku. Lumpur berasal dari unit sedimentasi yang dibuang secara rutin setiap 10 menit dengan volume lumpur rerata 144,93 m3/hari dan pada kondisi maksimum 628,30 m3/hari, unit biofilter yang dibuang secara berkala saat dilakukan pengurasan bak yaitu 150,10 m3/hari, serta unit saringan pasir cepat yang membuang air bekas backwash filter secara berkala dan dalam waktu yang singkat sebesar 468,86 m3/hari. Mempertimbangkan perbedaan karakteristik lumpur yang dihasilkan, direncanakan 2 unit tanki penampung (ekualisasi) terpisah yaitu tanki pertama menerima lumpur sedimentasi serta tanki kedua menerima lumpur pengurasan bio filter dan air bekas backwash filter. Memperhatikan luas lahan yang tersedia, maka lumpur sedimentasi yang terkumpul di tanki penampung dipompa menuju ke unit thickener dan selanjutnya ke unit dewatering mekanik. Studi perbandingan dilakukan terhadap 3 opsi peralatan dewatering mekanik dengan mempertimbangkan volume lumpur yang dapat direduksi, biaya investasi, serta biaya operasional dan energi.   Peralatan dewatering mekanik terpilih adalah belt filter press yang mereduksi lumpur sedimentasi menjadi 4,20 m3/hari, dan pada kondisi maksimum menjadi 18,20 m3/hari. </p><p>Keywords: water treatment plant, sludges, backwashed water, dewatering</p>

Influence of Water Treatment Residuals on Phosphorus Solubility and Leaching

2002 ◽  
Vol 31 (4) ◽  
pp. 1362-1369 ◽  
Author(s):  
H.A. Elliott ◽  
G.A. O'Connor ◽  
P. Lu ◽  
S. Brinton
Keyword(s):  
Water Treatment ◽  
Water Treatment Residuals ◽  
Influence Of Water ◽  
Phosphorus Solubility

scholarly journals QUALITY TEST AND PLANNING OF SLUDGE TREATMENT INSTALLATION OF WATER TREATMENT PDAM

Konversi ◽  
2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Indah Listiowati ◽  
Abdul Hakim ◽  
Shinfi Wazna Auvaria
Keyword(s):  
Water Treatment ◽  
Total Suspended Solid ◽  
Total Solid ◽  
Suspended Solid ◽  
Filter Press ◽  
Quality Test ◽  
Grab Sampling ◽  
Sludge Treatment ◽  
Gravity Thickening ◽  
Belt Filter Press

Tujuan pada penilitian ini, untuk mengetahui kualitas dan perencanaan pengolahan lumpur instalasi pengolahan air PDAM. Metode yang digunakan mengenai tahapan pengampilan sampel yaitu dengan grab sampling, dan pengambilan dilakukan selama 8 hari. Pengambilan sampel lumpur dilkakukan pada pipa yang didiamkan mengalir selama 30 detik agar didapatkan debit konstan. Analisa untuk uji kualitas lumpur IPA PDAM dilakukan di laboratorium. Hasil dari penelitian mengenai uji kualitas  pada pipa pembuangan lumpur pada unit sedimentasi. Data yang dibutuhkan meliputi data primer, dan sekunder. Hasil dari penelitian ini mengenai uji kualitas lumpur dari instalasi pengolahan air PDAM, memiliki nilai rata-rata pH 7,7, suhu 27°C, kekeruhan >1000 NTU hal ini dikarenakan kualitas air baku yang memiliki kandungana koloid tinggi. Total solid memiliki nilai rata-rata 281.772 mg/L, total suspended solid dengan nilai rata-rata 52.134 mg/L, COD memiliki nilai rata-rata 3.100 mg/L, dan BOD 3,96 mg/L dengan nilai ratarata . Debit rata-rata harian lumpur yang dihasilkan dari instalasi pengolahan air sebesar 145,773 m3/hari. Unit yang direncanakan sesuai dengan kualitas, dan volume yang diketahui maka direncanakan unit pengolahan lumpur meliputi bak pengumpul, gravity thickening, belt filter press, dan bak pengumpul dry cake. Anggaran biaya yang direncanakan untuk perencanaan pengolahan lumpur instalasi pengolahan air sesuai dengan unit yang diperlukan membutuhkan anggaran dana sebesar Rp. 1.037.900.00,00.

Phosphorus partitioning in co-dewatering biosolids and water treatment residuals

2014 ◽  
Vol 70 (3) ◽  
pp. 422-429 ◽  
Author(s):  
Herschel A. Elliott ◽  
Malcolm Taylor
Keyword(s):  
Water Treatment ◽  
Dry Mass ◽  
Cationic Polyelectrolyte ◽  
Land Application ◽  
Water Treatment Residuals ◽  
Polymer Addition ◽  
Reject Water ◽  
Extractable P ◽  
The Impact ◽  
Total P

Stabilization and dewatering methods for wastewater solids determine the concentration and nature of phosphorus (P) in biosolids and in-plant sidestreams recycled to the liquid treatment facility. Because water treatment residuals (WTR) exhibit strong immobilization of soluble P, this study evaluated the impact of co-dewatering WTR and biosolids on the P partitioning during dewatering and the environmental lability of biosolids-P measured by water-extractable P (WEP). Overall, P progressively partitioned into the water-insoluble particulate-bound form in dewatered cake with increasing blending ratio (BR) – defined as the dry mass ratio of WTR to biosolids. The reject water total P (TP) content from dewatering biosolids alone (250 mg L−1) was reduced to 60 mg L−1 for a BR = 1.5. Polymer addition resulted in statistically (α = 0.05) lower reject liquid TP, suggesting the cationic polyelectrolyte contributed to P binding. The WEP of the dewatered cake (∼20% solids) dropped from 2.36 g kg−1 (biosolids only) to ∼0.14 g kg−1 for BR = 1.5, meaning the P in land-applied co-processed cake is less susceptible to solubilization by surface runoff compared to unamended biosolids. Co-dewatering can reduce P in return flows and fix P in the dewatered solids in a form less prone to off-site migration following land application.

BELT FILTER PRESS ENHANCEMENTS INCREASE THROUGHPUT AT THE SAN ANTONIO RIVER AUTHORITY

2006 ◽  
Vol 2006 (2) ◽  
pp. 435-444
Author(s):  
Lynne Moss ◽  
Jeff Peters ◽  
Randy Wauters ◽  
Steve Mergele
Keyword(s):  
San Antonio ◽  
Filter Press ◽  
Belt Filter Press
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