8、城市污水处理出水的再生利用

　　在我国，花费大量投资建设了城市污水处理厂，但经过处理后的再生水并没有得到充分利用，有的地区甚至还将处理后的再生水与未经处理的污水混入一起同流合污，有的地区没有将再生水合理再用却直接排入大海造成淡水资源的浪费。因此，在城市污水处理决策中应充分考虑污水的再生利用。城市污水处理厂出水可用作农业用水、市政杂用水、工业冷却用水、工业生产用水、地下水补充等；另一方面，城市污水处理厂出水也可看作是水文循环的组成部分，将合乎质量要求的出水排放到河流水体中，使河流水体能维持或变成供下游使用的原水源，不仅经济可行，而且可减少风险并发挥河流自净能力。

　　在我国的城市污水处理技术政策中，提倡各类规模的污水处理设施按照经济合理和卫生安全的原则，实行污水再生利用。发展再生水在农业灌溉、绿地浇灌、城市杂用、生态恢复和工业冷却等方面的利用。城市污水再生利用，应根据用户需求和用途，合理确定用水的水量和水质。污水再生利用，可选用混凝、过滤、消毒或自然净化等深度处理技术。因此，缺水城市和水环境污染严重的地区，在规划建设远距离调水之前应积极实施城市污水再生利用工程，同时做好非投资性或低投资性的节水减污工作。

　　城市污水再生利用规划建设要依照客观需要和实际可能的原则，按照远期规划确定最终规模，以现状水量及用水需求为主要依据确定实施规模。城市污水再生利用技术选择与工程实施要考虑国情、实际条件和用户需求，城市污水再生利用规模、处理程度、处理流程、输水方式、再生水质、使用用途的选择上，既要满足要求，又要经济合理。目前城市污水再生利用应着重于农业灌溉、市政杂用、景观水体、生活杂用、工业冷却、生态环境和补充地表水。

　　城市污水再生处理工艺应根据处理规模、水质特性、再生水用途及当地的实际情况和要求，经全面技术经济比较后优选确定。工艺选择的主要技术经济指标包括：再生处理单位水量投资、再生处理单位水量电耗和成本、占地面积、运行性能可靠性、管理维护难易程度、总体经济与社会效益等。

　　城市污水再生利用的工程设计，应对再生水水源的现状水质特性、污染物构成进行详细调查或测定，做出合理的分析预测；应切合实际地并安全可靠地确定再生水水源水质和再生处理水质要求，采用不同的单元工艺组合，优化工艺设计参数。  

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Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等。

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6：ABB：工业机器人备件DSQC系列、Bailey INFI 90等。

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8：Motorola（摩托罗拉）：MVME 162、MVME 167、MVME1772、MVME177等系列。

9：XYCOM：I/O 、VME板和处理器等。

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14:工业机器人系统备件。

ACCURAY 61552-002 MPR MODULE GOOD TAKEOUT

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NICE LOT OF 15 ACCURAY Control Interface Boards (2175)

ACCURAY 2-067441-002 SCANNER PRINTED CIRCUIT BOARD MODULE CARD PCB 55216

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ACCURAY 60155750-001 SCANNER CIRCUIT BOARD PCB MODULE CARD HEDP-G BD40DM 55217

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ACCURAY 064860-003 PC CIRCUIT BOARD MODULE CAD FDI PLC CARD 54543

ACCURAY 085156-001 REV. DC PC BOARD 085156001 

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ACCURAY 2-085155-001 PC PCB CONTROL PRINTED CIRCUIT BOARD MODULE CARD 58690

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ACCURAY BPNL150A-003 KB150X CONTROL DISPLAY PANEL CONTROLLER MODULE 58676

ABB ACCURAY 8-061594-003 SSI PCB CIRCUIT BOARD MODULE CARD 56993

ACCURAY 773863004 5-053789-001 1.5IN LED DEDICATED PROCESS DISPLAY MODULE 58622

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ACCURAY 5-053788-001 1.5IN LED DEDICATED PROCESS DISPLAY MODULE 58671

ACCURAY 2-064810-002 OPERATOR INTERFACE LAMP DRIVER MODULE CARD BOARD 58343

ACCURAY 2-064810-002 OPERATOR INTERFACE LAMP DRIVER MODULE CIRCUIT BOARD 58675

ACCURAY 062798-003 NSFP 062798003

ACCURAY 60132860 BPNL1508-001 SECURITY CONTROL DISPLAY PANEL MODULE 58807

AccuRay 9-085159-001 Rev. BB PPC Board 

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AccuRay 9-064856-001 Power Failsafe 

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HONEYWELL ACCURAY BCMM044B 60144916-001 SCANNER PCB CONTROL CIRCUIT BOARD 58629

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ACCURAY 082132-001 082133-001 SCANNER CONTROL BOARD MODULE CARD 59053

ABB / ACCURAY 083898-010 ELECTROMETER RELAY 11PIN R600M OHM TC=12MS 58685

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ACCURAY 086175-001 INPUT MODULE MOTHERBOARD ELECTRICAL CIRCUIT BOARD CARD 58013

ACCURAY MICROSCAN CALIPER CALIBRATION BLOCKS NA-B-8-082537-001-A L13

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Accuray 64844-001 64844001 Process Interface Board 

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ACCURAY AIC8 086155-001 SCANNER VME CONTROL BOARD CARD 86155 51642

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ACCURAY 086158-004 SIO6 A SCANNER CONTROL CIRCUIT BOARD MODULE CARD PC PCB 58615

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INDUSTRIAL NUCLEONICS ACCURAY AD-9-055109-30269 727622008 55169-30269 PCB CIRCUI

INDUSTRIAL NUCLEONICS ACCURAY 1780-52 89-69-0458 PCB CIRCUIT BOARD / CARD / MODU

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